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    <link:label id="lab_us-gaap_CashSurrenderValueFairValueDisclosure_9f04da56-532e-45f6-b51d-1082e499ebda_terseLabel_en-US" xlink:label="lab_us-gaap_CashSurrenderValueFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash surrender value of life insurance</link:label>
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    <link:label id="lab_mnk_PayablesDueToProfessionalAdvisorSuccessFees_documentation_en-US" xlink:label="lab_mnk_PayablesDueToProfessionalAdvisorSuccessFees" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payables due to Professional Advisor Success Fees</link:label>
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    <link:label id="lab_us-gaap_ReorganizationChapter11LineItems_dc76503d-ff67-442b-853d-8ef39462222d_terseLabel_en-US" xlink:label="lab_us-gaap_ReorganizationChapter11LineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization, Chapter 11 [Line Items]</link:label>
    <link:label id="lab_us-gaap_ReorganizationChapter11LineItems_label_en-US" xlink:label="lab_us-gaap_ReorganizationChapter11LineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization, Chapter 11 [Line Items]</link:label>
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    <link:label id="lab_dei_EntityIncorporationStateCountryCode_17dbaabf-eb24-4d30-93a9-60622118456f_terseLabel_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_label_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
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    <link:label id="lab_mnk_SpecialtyGenericsMember_13277561-73d8-4c96-8ba2-31f6a201fdca_terseLabel_en-US" xlink:label="lab_mnk_SpecialtyGenericsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Specialty Generics</link:label>
    <link:label id="lab_mnk_SpecialtyGenericsMember_label_en-US" xlink:label="lab_mnk_SpecialtyGenericsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Specialty Generics [Member]</link:label>
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    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerAbstract_2d964284-ba29-41d4-9b84-23bd4a4bc0cc_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue from Contract with Customer [Abstract]</link:label>
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerAbstract_label_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue from Contract with Customer [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerAbstract"/>
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    <link:label id="lab_us-gaap_AdditionalPaidInCapitalCommonStock_58071e30-ebcf-4b3c-8ce1-f8abc8cde730_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additional Paid in Capital, Common Stock</link:label>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalCommonStock_label_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additional Paid in Capital, Common Stock</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
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    <link:label id="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_fa8ecbd4-61d1-447a-a992-e7472a7a7e97_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Benefit plans, net of tax</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent"/>
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    <link:label id="lab_us-gaap_RestructuringCostAndReserveAxis_ac5a1e74-14b9-492e-ad25-a756fc43771d_terseLabel_en-US" xlink:label="lab_us-gaap_RestructuringCostAndReserveAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring Type [Axis]</link:label>
    <link:label id="lab_us-gaap_RestructuringCostAndReserveAxis_label_en-US" xlink:label="lab_us-gaap_RestructuringCostAndReserveAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis" xlink:to="lab_us-gaap_RestructuringCostAndReserveAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ActharGelRelatedSettlementPaymentYearSixAndSeven_1a1fd4d5-dcf4-47e5-b50c-0887c6dd4541_terseLabel_en-US" xlink:label="lab_mnk_ActharGelRelatedSettlementPaymentYearSixAndSeven" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel-Related Settlement, Payment Year Six and Seven</link:label>
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    <link:label id="lab_mnk_ActharGelRelatedSettlementPaymentYearSixAndSeven_documentation_en-US" xlink:label="lab_mnk_ActharGelRelatedSettlementPaymentYearSixAndSeven" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel-Related Settlement, Payment Year Six and Seven</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_ActharGelRelatedSettlementPaymentYearSixAndSeven" xlink:to="lab_mnk_ActharGelRelatedSettlementPaymentYearSixAndSeven" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_IndemnificationReceivableCurrentMember_b16798ab-a22a-4ec5-b950-0702c46852bb_terseLabel_en-US" xlink:label="lab_mnk_IndemnificationReceivableCurrentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Indemnification Receivable, Current</link:label>
    <link:label id="lab_mnk_IndemnificationReceivableCurrentMember_label_en-US" xlink:label="lab_mnk_IndemnificationReceivableCurrentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Indemnification Receivable, Current [Member]</link:label>
    <link:label id="lab_mnk_IndemnificationReceivableCurrentMember_documentation_en-US" xlink:label="lab_mnk_IndemnificationReceivableCurrentMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Indemnification Receivable, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_IndemnificationReceivableCurrentMember" xlink:href="mnk-20220701.xsd#mnk_IndemnificationReceivableCurrentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_IndemnificationReceivableCurrentMember" xlink:to="lab_mnk_IndemnificationReceivableCurrentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_EightPercentDebentureMember_676e8395-dcf3-4519-9e31-ab1f137778d4_terseLabel_en-US" xlink:label="lab_mnk_EightPercentDebentureMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">8.00% Debenture</link:label>
    <link:label id="lab_mnk_EightPercentDebentureMember_label_en-US" xlink:label="lab_mnk_EightPercentDebentureMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Eight Percent Debenture [Member]</link:label>
    <link:label id="lab_mnk_EightPercentDebentureMember_documentation_en-US" xlink:label="lab_mnk_EightPercentDebentureMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Eight Percent Debenture [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_EightPercentDebentureMember" xlink:href="mnk-20220701.xsd#mnk_EightPercentDebentureMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_EightPercentDebentureMember" xlink:to="lab_mnk_EightPercentDebentureMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherAssetsNoncurrent_47cd18d7-9603-494e-afb5-3ebbfb896875_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other assets</link:label>
    <link:label id="lab_us-gaap_OtherAssetsNoncurrent_label_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Assets, Noncurrent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssetsNoncurrent" xlink:to="lab_us-gaap_OtherAssetsNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_RestructuringAndRelatedCostsNonCashChargesIncludingAcceleratedDepreciation_25bbf095-bca4-4272-8fc1-10b18612df1e_terseLabel_en-US" xlink:label="lab_mnk_RestructuringAndRelatedCostsNonCashChargesIncludingAcceleratedDepreciation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring and Related Costs, Non-cash Charges, Including Accelerated Depreciation</link:label>
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    <link:label id="lab_mnk_RestructuringAndRelatedCostsNonCashChargesIncludingAcceleratedDepreciation_documentation_en-US" xlink:label="lab_mnk_RestructuringAndRelatedCostsNonCashChargesIncludingAcceleratedDepreciation" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring and Related Costs, Non-cash Charges, Including Accelerated Depreciation</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_RestructuringAndRelatedCostsNonCashChargesIncludingAcceleratedDepreciation" xlink:to="lab_mnk_RestructuringAndRelatedCostsNonCashChargesIncludingAcceleratedDepreciation" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressCountry_50854a6a-6dbc-4bac-951d-9e05b76b93e5_terseLabel_en-US" xlink:label="lab_dei_EntityAddressCountry" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Country</link:label>
    <link:label id="lab_dei_EntityAddressCountry_label_en-US" xlink:label="lab_dei_EntityAddressCountry" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Country</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCountry" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressCountry"/>
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    <link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_6170673e-e901-42f6-9754-cf756e4f05dd_terseLabel_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segments [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_label_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segments [Axis]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis" xlink:to="lab_us-gaap_StatementBusinessSegmentsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ReorganizationValue_cce9fd9e-0a2b-4d02-bacc-b25a000bad52_terseLabel_en-US" xlink:label="lab_us-gaap_ReorganizationValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Value</link:label>
    <link:label id="lab_us-gaap_ReorganizationValue_label_en-US" xlink:label="lab_us-gaap_ReorganizationValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReorganizationValue" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReorganizationValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReorganizationValue" xlink:to="lab_us-gaap_ReorganizationValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_91d8e511-1815-48f6-9eb0-11d5f88b9541_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Compensation Liability, Fair Value</link:label>
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    <link:label id="lab_dei_EntityFileNumber_b81d2eb3-f92b-4e20-9c61-45934042e157_terseLabel_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity File Number</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPricePercentage_13ac4aec-7422-4de9-8536-ba482511201c_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPricePercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Instrument, Redemption Price, Percentage</link:label>
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    <link:label id="lab_mnk_MallinckrodtMember_43f6233d-45e5-4575-a7ed-175cdb0a3d7f_terseLabel_en-US" xlink:label="lab_mnk_MallinckrodtMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mallinckrodt</link:label>
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    <link:label id="lab_us-gaap_PreferredStockValueOutstanding_2f9ad480-23fd-4fd8-9810-b458218b6b10_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockValueOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred shares</link:label>
    <link:label id="lab_us-gaap_PreferredStockValueOutstanding_label_en-US" xlink:label="lab_us-gaap_PreferredStockValueOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred Stock, Value, Outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValueOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockValueOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockValueOutstanding" xlink:to="lab_us-gaap_PreferredStockValueOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_TermLoandue2024Member_13c509aa-3995-4912-a533-c808094ba848_terseLabel_en-US" xlink:label="lab_mnk_TermLoandue2024Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term Loan due 2024</link:label>
    <link:label id="lab_mnk_TermLoandue2024Member_label_en-US" xlink:label="lab_mnk_TermLoandue2024Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term Loan due 2024 [Member]</link:label>
    <link:label id="lab_mnk_TermLoandue2024Member_documentation_en-US" xlink:label="lab_mnk_TermLoandue2024Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term Loan due 2024 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_TermLoandue2024Member" xlink:href="mnk-20220701.xsd#mnk_TermLoandue2024Member"/>
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    <link:label id="lab_us-gaap_PaymentsOfFinancingCosts_8172313d-230c-426d-bab3-358d06c7c541_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfFinancingCosts" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt financing costs</link:label>
    <link:label id="lab_us-gaap_PaymentsOfFinancingCosts_label_en-US" xlink:label="lab_us-gaap_PaymentsOfFinancingCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments of Financing Costs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfFinancingCosts" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsOfFinancingCosts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfFinancingCosts" xlink:to="lab_us-gaap_PaymentsOfFinancingCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_FreshStartAdjustmentsAOCIIncomeTaxEffects_6c9df595-1916-44b8-9b8c-0af76b072085_terseLabel_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsAOCIIncomeTaxEffects" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, AOCI, Income Tax Effects</link:label>
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    <link:label id="lab_mnk_FreshStartAdjustmentsAOCIIncomeTaxEffects_documentation_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsAOCIIncomeTaxEffects" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, AOCI, Income Tax Effects</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_FreshStartAdjustmentsAOCIIncomeTaxEffects" xlink:href="mnk-20220701.xsd#mnk_FreshStartAdjustmentsAOCIIncomeTaxEffects"/>
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    <link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations_1e5a329e-8a4b-46c9-ad36-4a5dc6160e42_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term debt</link:label>
    <link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations_label_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt and Lease Obligation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:to="lab_us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DeferredTaxAssetsLiabilitiesNet_7b0a6a0f-9d2b-498d-9846-44d2f4dd0bce_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Tax Assets, Net</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsLiabilitiesNet_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Tax Assets, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:to="lab_us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_b66f757a-7bbe-4892-8698-cbc6c9da9c67_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Inventories</link:label>
    <link:label id="lab_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Inventory, Current [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfInventoryCurrentTableTextBlock"/>
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    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_5ebee79f-6432-4fc6-b2b7-610656b42892_terseLabel_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
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    <link:label id="lab_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_677c72b9-d68f-49c6-857f-e46d73d00ec1_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Lease, Weighted Average Discount Rate, Percent</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent"/>
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    <link:label id="lab_mnk_ReorganizationAdjustmentsCashedUsed_fe19dcd5-1c8a-4749-87f6-6d163e0114f2_terseLabel_en-US" xlink:label="lab_mnk_ReorganizationAdjustmentsCashedUsed" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Adjustments, Cashed Used</link:label>
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    <link:label id="lab_mnk_ReorganizationAdjustmentsCashedUsed_documentation_en-US" xlink:label="lab_mnk_ReorganizationAdjustmentsCashedUsed" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Adjustments, Cashed Used</link:label>
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    <link:label id="lab_mnk_RestructuringChargesCash_30cdca21-a4d7-4cfd-a65e-76f680154d37_netLabel_en-US" xlink:label="lab_mnk_RestructuringChargesCash" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Charges</link:label>
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    <link:label id="lab_mnk_RestructuringChargesCash_documentation_en-US" xlink:label="lab_mnk_RestructuringChargesCash" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash Restructuring Charges</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_RestructuringChargesCash" xlink:href="mnk-20220701.xsd#mnk_RestructuringChargesCash"/>
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    <link:label id="lab_mnk_ContingentLiabilitiesFairValueDisclosure_52546685-9470-4470-9de0-a9809a433d53_terseLabel_en-US" xlink:label="lab_mnk_ContingentLiabilitiesFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contingent consideration and acquired contingent liabilities</link:label>
    <link:label id="lab_mnk_ContingentLiabilitiesFairValueDisclosure_label_en-US" xlink:label="lab_mnk_ContingentLiabilitiesFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contingent Liabilities, Fair Value Disclosure</link:label>
    <link:label id="lab_mnk_ContingentLiabilitiesFairValueDisclosure_documentation_en-US" xlink:label="lab_mnk_ContingentLiabilitiesFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contingent Liabilities, Fair Value Disclosure</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ContingentLiabilitiesFairValueDisclosure" xlink:href="mnk-20220701.xsd#mnk_ContingentLiabilitiesFairValueDisclosure"/>
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    <link:label id="lab_mnk_CuraScriptIncMember_f159e2e3-142f-468c-8011-9614476d89c6_terseLabel_en-US" xlink:label="lab_mnk_CuraScriptIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CuraScript, Inc</link:label>
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    <link:label id="lab_mnk_CuraScriptIncMember_documentation_en-US" xlink:label="lab_mnk_CuraScriptIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CuraScript, Inc [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_CuraScriptIncMember" xlink:href="mnk-20220701.xsd#mnk_CuraScriptIncMember"/>
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    <link:label id="lab_mnk_OfirmevMember_accd2929-508e-46c4-84d8-5136a69a7e53_terseLabel_en-US" xlink:label="lab_mnk_OfirmevMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ofirmev</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_mnk_OfirmevMember" xlink:href="mnk-20220701.xsd#mnk_OfirmevMember"/>
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    <link:label id="lab_mnk_SalesReservesRollforwardTableTextBlock_be958a4b-974a-4299-9f51-dfd11624863c_terseLabel_en-US" xlink:label="lab_mnk_SalesReservesRollforwardTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sales Reserves Rollforward</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_mnk_SalesReservesRollforwardTableTextBlock" xlink:href="mnk-20220701.xsd#mnk_SalesReservesRollforwardTableTextBlock"/>
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    <link:label id="lab_us-gaap_BusinessAcquisitionAxis_48ae42a1-4d00-469f-a32f-35635193f38d_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Acquisition [Axis]</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionAxis_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Acquisition [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionAxis" xlink:to="lab_us-gaap_BusinessAcquisitionAxis" xlink:type="arc" order="1"/>
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    <link:label id="lab_mnk_OtherAPIMember_label_en-US" xlink:label="lab_mnk_OtherAPIMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other API [Member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_OtherAPIMember" xlink:to="lab_mnk_OtherAPIMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInInterestPayableNet_9620753a-9f6f-48a5-b3d9-ff3a260ddb44_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInInterestPayableNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Interest Payable, Net</link:label>
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    <link:label id="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_201bed8f-bbdd-4684-bdd0-659e3a968632_terseLabel_en-US" xlink:label="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pension and postretirement benefits</link:label>
    <link:label id="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_label_en-US" xlink:label="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liability, Defined Benefit Plan, Noncurrent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:to="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_OpioidRelatedLitigationSettlementLiabilityNonCurrent_2e0ed46a-1463-4e33-8e8b-bb46edd80afb_terseLabel_en-US" xlink:label="lab_mnk_OpioidRelatedLitigationSettlementLiabilityNonCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid-Related Litigation Settlement liability</link:label>
    <link:label id="lab_mnk_OpioidRelatedLitigationSettlementLiabilityNonCurrent_label_en-US" xlink:label="lab_mnk_OpioidRelatedLitigationSettlementLiabilityNonCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid-Related Litigation Settlement liability, Non-current</link:label>
    <link:label id="lab_mnk_OpioidRelatedLitigationSettlementLiabilityNonCurrent_documentation_en-US" xlink:label="lab_mnk_OpioidRelatedLitigationSettlementLiabilityNonCurrent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid-Related Litigation Settlement liability, Non-current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_OpioidRelatedLitigationSettlementLiabilityNonCurrent" xlink:href="mnk-20220701.xsd#mnk_OpioidRelatedLitigationSettlementLiabilityNonCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_OpioidRelatedLitigationSettlementLiabilityNonCurrent" xlink:to="lab_mnk_OpioidRelatedLitigationSettlementLiabilityNonCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_GenericsMember_cc918dc4-9245-4cb3-a51b-5ad1e949cfb0_terseLabel_en-US" xlink:label="lab_mnk_GenericsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Generics</link:label>
    <link:label id="lab_mnk_GenericsMember_label_en-US" xlink:label="lab_mnk_GenericsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Generics [Member]</link:label>
    <link:label id="lab_mnk_GenericsMember_documentation_en-US" xlink:label="lab_mnk_GenericsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Generics</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_GenericsMember" xlink:href="mnk-20220701.xsd#mnk_GenericsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_GenericsMember" xlink:to="lab_mnk_GenericsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_IncreaseDecreaseIncomeTaxExpenseBenefitSeparationCostsReorganizationItemsAndRestructuringCharges_c18f4443-1b95-4867-b26a-14252728877f_terseLabel_en-US" xlink:label="lab_mnk_IncreaseDecreaseIncomeTaxExpenseBenefitSeparationCostsReorganizationItemsAndRestructuringCharges" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease), Income Tax Expense (Benefit), Separation Costs, Reorganization Items, and Restructuring Charges</link:label>
    <link:label id="lab_mnk_IncreaseDecreaseIncomeTaxExpenseBenefitSeparationCostsReorganizationItemsAndRestructuringCharges_label_en-US" xlink:label="lab_mnk_IncreaseDecreaseIncomeTaxExpenseBenefitSeparationCostsReorganizationItemsAndRestructuringCharges" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease), Income Tax Expense (Benefit), Separation Costs, Reorganization Items, and Restructuring Charges</link:label>
    <link:label id="lab_mnk_IncreaseDecreaseIncomeTaxExpenseBenefitSeparationCostsReorganizationItemsAndRestructuringCharges_documentation_en-US" xlink:label="lab_mnk_IncreaseDecreaseIncomeTaxExpenseBenefitSeparationCostsReorganizationItemsAndRestructuringCharges" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease), Income Tax Expense (Benefit), Separation Costs, Reorganization Items, and Restructuring Charges</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_IncreaseDecreaseIncomeTaxExpenseBenefitSeparationCostsReorganizationItemsAndRestructuringCharges" xlink:href="mnk-20220701.xsd#mnk_IncreaseDecreaseIncomeTaxExpenseBenefitSeparationCostsReorganizationItemsAndRestructuringCharges"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_IncreaseDecreaseIncomeTaxExpenseBenefitSeparationCostsReorganizationItemsAndRestructuringCharges" xlink:to="lab_mnk_IncreaseDecreaseIncomeTaxExpenseBenefitSeparationCostsReorganizationItemsAndRestructuringCharges" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_LiabilitiesReinstated_6ad532d0-04f9-4c80-b038-bda4b6fecac9_terseLabel_en-US" xlink:label="lab_mnk_LiabilitiesReinstated" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities, Reinstated</link:label>
    <link:label id="lab_mnk_LiabilitiesReinstated_label_en-US" xlink:label="lab_mnk_LiabilitiesReinstated" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities, Reinstated</link:label>
    <link:label id="lab_mnk_LiabilitiesReinstated_documentation_en-US" xlink:label="lab_mnk_LiabilitiesReinstated" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities, Reinstated</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_LiabilitiesReinstated" xlink:href="mnk-20220701.xsd#mnk_LiabilitiesReinstated"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_LiabilitiesReinstated" xlink:to="lab_mnk_LiabilitiesReinstated" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_LocalPhoneNumber_14155040-da92-48c0-b23c-2279976147c9_terseLabel_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Local Phone Number</link:label>
    <link:label id="lab_dei_LocalPhoneNumber_label_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Local Phone Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LocalPhoneNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LocalPhoneNumber" xlink:to="lab_dei_LocalPhoneNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GuaranteeObligationsCurrentCarryingValue_7deb9f21-db0a-4277-aa80-9990ff374186_terseLabel_en-US" xlink:label="lab_us-gaap_GuaranteeObligationsCurrentCarryingValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Guarantors obligation</link:label>
    <link:label id="lab_us-gaap_GuaranteeObligationsCurrentCarryingValue_label_en-US" xlink:label="lab_us-gaap_GuaranteeObligationsCurrentCarryingValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Guarantor Obligations, Current Carrying Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GuaranteeObligationsCurrentCarryingValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue" xlink:to="lab_us-gaap_GuaranteeObligationsCurrentCarryingValue" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ActharGelRelatedSettlementPaymentYearOne_5807e26c-679d-4c20-a502-3988ca1341b5_terseLabel_en-US" xlink:label="lab_mnk_ActharGelRelatedSettlementPaymentYearOne" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel-Related Settlement, Payment Year One</link:label>
    <link:label id="lab_mnk_ActharGelRelatedSettlementPaymentYearOne_label_en-US" xlink:label="lab_mnk_ActharGelRelatedSettlementPaymentYearOne" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel-Related Settlement, Payment Year One</link:label>
    <link:label id="lab_mnk_ActharGelRelatedSettlementPaymentYearOne_documentation_en-US" xlink:label="lab_mnk_ActharGelRelatedSettlementPaymentYearOne" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel-Related Settlement, Payment Year One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ActharGelRelatedSettlementPaymentYearOne" xlink:href="mnk-20220701.xsd#mnk_ActharGelRelatedSettlementPaymentYearOne"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_ActharGelRelatedSettlementPaymentYearOne" xlink:to="lab_mnk_ActharGelRelatedSettlementPaymentYearOne" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AssetsAbstract_71920361-f1e7-4c93-a9ca-664467ceab92_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets</link:label>
    <link:label id="lab_us-gaap_AssetsAbstract_label_en-US" xlink:label="lab_us-gaap_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets [Abstract]</link:label>
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    <link:label id="lab_mnk_ReorganizationItemsNonCash_42d51dcd-d018-4e07-a23f-5d5403c06ea9_terseLabel_en-US" xlink:label="lab_mnk_ReorganizationItemsNonCash" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Items, non-cash</link:label>
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    <link:label id="lab_mnk_ReorganizationItemsNonCash_documentation_en-US" xlink:label="lab_mnk_ReorganizationItemsNonCash" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Items, non-cash</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ReorganizationItemsNonCash" xlink:href="mnk-20220701.xsd#mnk_ReorganizationItemsNonCash"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_ReorganizationItemsNonCash" xlink:to="lab_mnk_ReorganizationItemsNonCash" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherLiabilitiesMember_2d06f72d-fc83-450f-b7d7-52d3658e9e84_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other current and non-current liabilities</link:label>
    <link:label id="lab_us-gaap_OtherLiabilitiesMember_label_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Liabilities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherLiabilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilitiesMember" xlink:to="lab_us-gaap_OtherLiabilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_IncreaseDecreaseTaxExpenseBenefitCancellationOfDebtIncome_1d2794aa-f15d-4fd1-9be2-8efe3cce2bee_terseLabel_en-US" xlink:label="lab_mnk_IncreaseDecreaseTaxExpenseBenefitCancellationOfDebtIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) Tax Expense (Benefit), Cancellation of Debt Income</link:label>
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    <link:label id="lab_mnk_AsbestosRelatedDefenseCostAccrual_documentation_en-US" xlink:label="lab_mnk_AsbestosRelatedDefenseCostAccrual" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asbestos-related defense cost accrual</link:label>
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    <link:label id="lab_mnk_A2017ReplacementTermLoanMember_cf909874-9b32-4dec-bd18-97377a834827_terseLabel_en-US" xlink:label="lab_mnk_A2017ReplacementTermLoanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2017 Replacement Term Loan</link:label>
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    <link:label id="lab_mnk_OtherProductsMember_documentation_en-US" xlink:label="lab_mnk_OtherProductsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Products [Member]</link:label>
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsMember_433b911c-9ec7-44de-afe4-02dd161ac061_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finite-Lived Intangible Assets</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMember" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_DeferredDebtIssuanceCostsMember_8305c88d-283a-4433-a5e1-bbf25d8c6829_terseLabel_en-US" xlink:label="lab_mnk_DeferredDebtIssuanceCostsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Debt Issuance Costs</link:label>
    <link:label id="lab_mnk_DeferredDebtIssuanceCostsMember_label_en-US" xlink:label="lab_mnk_DeferredDebtIssuanceCostsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Debt Issuance Costs [Member]</link:label>
    <link:label id="lab_mnk_DeferredDebtIssuanceCostsMember_documentation_en-US" xlink:label="lab_mnk_DeferredDebtIssuanceCostsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Debt Issuance Costs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_DeferredDebtIssuanceCostsMember" xlink:href="mnk-20220701.xsd#mnk_DeferredDebtIssuanceCostsMember"/>
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    <link:label id="lab_us-gaap_SecuredDebtMember_89b932d8-d9c3-497f-9f9a-2e86fb2770aa_terseLabel_en-US" xlink:label="lab_us-gaap_SecuredDebtMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Secured Debt</link:label>
    <link:label id="lab_us-gaap_SecuredDebtMember_label_en-US" xlink:label="lab_us-gaap_SecuredDebtMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Secured Debt [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SecuredDebtMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SecuredDebtMember" xlink:to="lab_us-gaap_SecuredDebtMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_91863dc7-c5d5-4de9-a87c-48dc299fd233_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Accounts Receivable</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:to="lab_us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ContractWithCustomerSalesChannelAxis_eebddf58-1af9-4bac-b186-5ff07bfb8d28_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerSalesChannelAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract with Customer, Sales Channel [Axis]</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerSalesChannelAxis_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerSalesChannelAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract with Customer, Sales Channel [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerSalesChannelAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelAxis" xlink:to="lab_us-gaap_ContractWithCustomerSalesChannelAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ScheduleOfBasisOfPreperationTable_b45ed8d0-6096-4122-9574-8f2aa102bc2d_terseLabel_en-US" xlink:label="lab_mnk_ScheduleOfBasisOfPreperationTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Basis of Preperation [Table]</link:label>
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    <link:label id="lab_mnk_ScheduleOfBasisOfPreperationTable_documentation_en-US" xlink:label="lab_mnk_ScheduleOfBasisOfPreperationTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Basis of Preperation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ScheduleOfBasisOfPreperationTable" xlink:href="mnk-20220701.xsd#mnk_ScheduleOfBasisOfPreperationTable"/>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentLineItems_ca1dd03b-e8c6-4044-97cd-b91394f3e39f_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentLineItems" xlink:type="arc" order="1"/>
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    <link:loc xlink:type="locator" xlink:label="loc_mnk_AdjustmentToRetainedDeficitProfessionalSuccessAndExitFees" xlink:href="mnk-20220701.xsd#mnk_AdjustmentToRetainedDeficitProfessionalSuccessAndExitFees"/>
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    <link:loc xlink:type="locator" xlink:label="loc_mnk_IndemnificationReceivableNonCurrentMember" xlink:href="mnk-20220701.xsd#mnk_IndemnificationReceivableNonCurrentMember"/>
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    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_8650dcf8-e1a2-42cf-9315-f2f058572b69_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [Table]</link:label>
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    <link:label id="lab_us-gaap_OtherNoncashIncomeExpense_df9a3be5-abea-439c-8401-227d1a4395ed_terseLabel_en-US" xlink:label="lab_us-gaap_OtherNoncashIncomeExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Noncash Income (Expense)</link:label>
    <link:label id="lab_us-gaap_OtherNoncashIncomeExpense_f23d3121-4684-489d-befd-8914488ed62a_negatedLabel_en-US" xlink:label="lab_us-gaap_OtherNoncashIncomeExpense" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other non-cash items</link:label>
    <link:label id="lab_us-gaap_OtherNoncashIncomeExpense_label_en-US" xlink:label="lab_us-gaap_OtherNoncashIncomeExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Noncash Income (Expense)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherNoncashIncomeExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherNoncashIncomeExpense" xlink:to="lab_us-gaap_OtherNoncashIncomeExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EscrowDeposit_4a997526-c69e-432a-993e-e9d29e513c7e_terseLabel_en-US" xlink:label="lab_us-gaap_EscrowDeposit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Escrow Deposit</link:label>
    <link:label id="lab_us-gaap_EscrowDeposit_label_en-US" xlink:label="lab_us-gaap_EscrowDeposit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Escrow Deposit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EscrowDeposit" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EscrowDeposit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EscrowDeposit" xlink:to="lab_us-gaap_EscrowDeposit" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_LiabilitiesSubjectToCompromiseMember_d60f03b9-11fc-4571-b414-6d88db65b26d_terseLabel_en-US" xlink:label="lab_mnk_LiabilitiesSubjectToCompromiseMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities Subject to Compromise</link:label>
    <link:label id="lab_mnk_LiabilitiesSubjectToCompromiseMember_label_en-US" xlink:label="lab_mnk_LiabilitiesSubjectToCompromiseMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities Subject to Compromise [Member]</link:label>
    <link:label id="lab_mnk_LiabilitiesSubjectToCompromiseMember_documentation_en-US" xlink:label="lab_mnk_LiabilitiesSubjectToCompromiseMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities Subject to Compromise</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_LiabilitiesSubjectToCompromiseMember" xlink:href="mnk-20220701.xsd#mnk_LiabilitiesSubjectToCompromiseMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_LiabilitiesSubjectToCompromiseMember" xlink:to="lab_mnk_LiabilitiesSubjectToCompromiseMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_FreshStartAdjustmentsDebtIssuanceCosts_f5803975-fbab-4f49-a543-1ee49f42690f_terseLabel_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsDebtIssuanceCosts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, Debt Issuance Costs</link:label>
    <link:label id="lab_mnk_FreshStartAdjustmentsDebtIssuanceCosts_label_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsDebtIssuanceCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, Debt Issuance Costs</link:label>
    <link:label id="lab_mnk_FreshStartAdjustmentsDebtIssuanceCosts_documentation_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsDebtIssuanceCosts" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, Debt Issuance Costs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_FreshStartAdjustmentsDebtIssuanceCosts" xlink:href="mnk-20220701.xsd#mnk_FreshStartAdjustmentsDebtIssuanceCosts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_FreshStartAdjustmentsDebtIssuanceCosts" xlink:to="lab_mnk_FreshStartAdjustmentsDebtIssuanceCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ScheduleOfIntangibleAssetsTableTextBlock_9813462c-b006-4591-8349-3e2560f94445_terseLabel_en-US" xlink:label="lab_mnk_ScheduleOfIntangibleAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Intangible Assets</link:label>
    <link:label id="lab_mnk_ScheduleOfIntangibleAssetsTableTextBlock_label_en-US" xlink:label="lab_mnk_ScheduleOfIntangibleAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule Of Intangible Assets [Table Text Block]</link:label>
    <link:label id="lab_mnk_ScheduleOfIntangibleAssetsTableTextBlock_documentation_en-US" xlink:label="lab_mnk_ScheduleOfIntangibleAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tabular disclosure of intangible assets.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ScheduleOfIntangibleAssetsTableTextBlock" xlink:href="mnk-20220701.xsd#mnk_ScheduleOfIntangibleAssetsTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_ScheduleOfIntangibleAssetsTableTextBlock" xlink:to="lab_mnk_ScheduleOfIntangibleAssetsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_RevenueReservePaymentsorCredits_2d9c5ab8-e684-4ab7-a539-999806d4c7bf_terseLabel_en-US" xlink:label="lab_mnk_RevenueReservePaymentsorCredits" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue Reserve Payments or Credits</link:label>
    <link:label id="lab_mnk_RevenueReservePaymentsorCredits_label_en-US" xlink:label="lab_mnk_RevenueReservePaymentsorCredits" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue Reserve Payments or Credits</link:label>
    <link:label id="lab_mnk_RevenueReservePaymentsorCredits_documentation_en-US" xlink:label="lab_mnk_RevenueReservePaymentsorCredits" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue Reserve Payments or Credits</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_RevenueReservePaymentsorCredits" xlink:href="mnk-20220701.xsd#mnk_RevenueReservePaymentsorCredits"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_RevenueReservePaymentsorCredits" xlink:to="lab_mnk_RevenueReservePaymentsorCredits" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SecuredDebt_fae53200-6f04-429e-957e-56af7f0d46bf_terseLabel_en-US" xlink:label="lab_us-gaap_SecuredDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Secured Debt</link:label>
    <link:label id="lab_us-gaap_SecuredDebt_label_en-US" xlink:label="lab_us-gaap_SecuredDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Secured Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SecuredDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SecuredDebt" xlink:to="lab_us-gaap_SecuredDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalents_934de40c-1a29-4046-b898-885b2a434871_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restricted Cash and Cash Equivalents</link:label>
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalents_label_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restricted Cash and Cash Equivalents</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalents" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalents"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalents" xlink:to="lab_us-gaap_RestrictedCashAndCashEquivalents" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EmployeeBenefitsAndShareBasedCompensation_ed5bdebb-6f2d-4b05-87e9-f42c30bdd830_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee Benefits and Share-based Compensation</link:label>
    <link:label id="lab_us-gaap_EmployeeBenefitsAndShareBasedCompensation_label_en-US" xlink:label="lab_us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee Benefits and Share-based Compensation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeBenefitsAndShareBasedCompensation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:to="lab_us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_RebatesandChargebacksMember_0590941c-51f5-4377-ae69-af8bc3836e9d_terseLabel_en-US" xlink:label="lab_mnk_RebatesandChargebacksMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rebates and Chargebacks [Member]</link:label>
    <link:label id="lab_mnk_RebatesandChargebacksMember_label_en-US" xlink:label="lab_mnk_RebatesandChargebacksMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rebates and Chargebacks [Member]</link:label>
    <link:label id="lab_mnk_RebatesandChargebacksMember_documentation_en-US" xlink:label="lab_mnk_RebatesandChargebacksMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rebates and Chargebacks [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_RebatesandChargebacksMember" xlink:href="mnk-20220701.xsd#mnk_RebatesandChargebacksMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_RebatesandChargebacksMember" xlink:to="lab_mnk_RebatesandChargebacksMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_5b4c1fe3-8b5b-462d-8b2e-006e38182405_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]</link:label>
    <link:label id="lab_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_label_en-US" xlink:label="lab_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems" xlink:to="lab_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_PredecessorReorganizationMember_37e8da38-2fe6-491c-8f22-9699c82b7cb4_terseLabel_en-US" xlink:label="lab_mnk_PredecessorReorganizationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Predecessor</link:label>
    <link:label id="lab_mnk_PredecessorReorganizationMember_label_en-US" xlink:label="lab_mnk_PredecessorReorganizationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Predecessor, Reorganization [Member]</link:label>
    <link:label id="lab_mnk_PredecessorReorganizationMember_documentation_en-US" xlink:label="lab_mnk_PredecessorReorganizationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Predecessor, Reorganization</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_PredecessorReorganizationMember" xlink:href="mnk-20220701.xsd#mnk_PredecessorReorganizationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_PredecessorReorganizationMember" xlink:to="lab_mnk_PredecessorReorganizationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_StratatechMember_fef341f8-8b96-48da-9d6e-339b21c69798_terseLabel_en-US" xlink:label="lab_mnk_StratatechMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stratatech</link:label>
    <link:label id="lab_mnk_StratatechMember_label_en-US" xlink:label="lab_mnk_StratatechMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stratatech [Member]</link:label>
    <link:label id="lab_mnk_StratatechMember_documentation_en-US" xlink:label="lab_mnk_StratatechMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stratatech [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_StratatechMember" xlink:href="mnk-20220701.xsd#mnk_StratatechMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_StratatechMember" xlink:to="lab_mnk_StratatechMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_TenPointZeroPercentSecondLienNotesNew2LNotesMember_22b70cfd-b2a9-4e23-9699-2e7553ec494a_terseLabel_en-US" xlink:label="lab_mnk_TenPointZeroPercentSecondLienNotesNew2LNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">10.00% Second Lien Senior Notes</link:label>
    <link:label id="lab_mnk_TenPointZeroPercentSecondLienNotesNew2LNotesMember_label_en-US" xlink:label="lab_mnk_TenPointZeroPercentSecondLienNotesNew2LNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ten Point Zero Percent Second Lien Notes (New 2L Notes) [Member]</link:label>
    <link:label id="lab_mnk_TenPointZeroPercentSecondLienNotesNew2LNotesMember_documentation_en-US" xlink:label="lab_mnk_TenPointZeroPercentSecondLienNotesNew2LNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ten Point Zero Percent Second Lien Notes (New 2L Notes)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_TenPointZeroPercentSecondLienNotesNew2LNotesMember" xlink:href="mnk-20220701.xsd#mnk_TenPointZeroPercentSecondLienNotesNew2LNotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_TenPointZeroPercentSecondLienNotesNew2LNotesMember" xlink:to="lab_mnk_TenPointZeroPercentSecondLienNotesNew2LNotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_2d5a4e46-5679-4cf5-84df-901be4bb1c59_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt, Gross</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount" xlink:to="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_014bb960-b2fc-4437-8255-3c008ea67892_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current maturities of long-term debt</link:label>
    <link:label id="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_label_en-US" xlink:label="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt and Lease Obligation, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:to="lab_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_AssetsFairValueDisclosureAbstract_label_en-US" xlink:label="lab_us-gaap_AssetsFairValueDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets, Fair Value Disclosure [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsFairValueDisclosureAbstract"/>
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    <link:label id="lab_us-gaap_AssetsFairValueDisclosure_label_en-US" xlink:label="lab_us-gaap_AssetsFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets, Fair Value Disclosure</link:label>
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    <link:label id="lab_mnk_ActharGelMember_6d10fe5c-71f4-4d90-9400-f85dfecd9e29_terseLabel_en-US" xlink:label="lab_mnk_ActharGelMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar</link:label>
    <link:label id="lab_mnk_ActharGelMember_label_en-US" xlink:label="lab_mnk_ActharGelMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel [Member]</link:label>
    <link:label id="lab_mnk_ActharGelMember_documentation_en-US" xlink:label="lab_mnk_ActharGelMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel</link:label>
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    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_bb01b4e4-ec03-4c08-a425-5fe714eca9af_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Level 1</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel1Member"/>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_38d77ba7-159d-422f-a5ca-1c639181b557_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash Flows From Investing Activities:</link:label>
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    <link:label id="lab_us-gaap_IncomeTaxDisclosureAbstract_23bb8849-148f-4ff4-a508-1968254623ad_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Disclosure [Abstract]</link:label>
    <link:label id="lab_us-gaap_IncomeTaxDisclosureAbstract_label_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Disclosure [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract"/>
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    <link:label id="lab_mnk_PaymentsForCureAndStandardAdministrativeAndPriorityPayments_c9a70243-1024-4725-aeb5-1fed9c8e7581_terseLabel_en-US" xlink:label="lab_mnk_PaymentsForCureAndStandardAdministrativeAndPriorityPayments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments for Cure and Standard, Administrative and Priority Payments</link:label>
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    <link:label id="lab_dei_EntitySmallBusiness_1996947d-57d9-48a3-8d0a-4deeaaf887cf_terseLabel_en-US" xlink:label="lab_dei_EntitySmallBusiness" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Small Business</link:label>
    <link:label id="lab_dei_EntitySmallBusiness_label_en-US" xlink:label="lab_dei_EntitySmallBusiness" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Small Business</link:label>
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsMember_58b6a0b4-4309-4b99-9c1d-a2cd9146e79f_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash and Cash Equivalents</link:label>
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    <link:label id="lab_us-gaap_AdditionalPaidInCapital_a3f3daa3-7725-4f59-90be-4dae74e35351_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapital" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Predecessor ordinary shares, $0.20 par value, 500,000,000 authorized; 94,296,235 issued; 84,726,590 outstanding</link:label>
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    <link:label id="lab_us-gaap_ConcentrationRiskLineItems_f6f7c7ff-67d1-44d8-afff-a9912ea59584_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk</link:label>
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    <link:label id="lab_mnk_FreshStartAdjustmentsIncomeTaxReceivables_documentation_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsIncomeTaxReceivables" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, Income Tax Receivables</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_FreshStartAdjustmentsIncomeTaxReceivables" xlink:href="mnk-20220701.xsd#mnk_FreshStartAdjustmentsIncomeTaxReceivables"/>
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    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_c814f7a6-9766-4054-96f3-41e095b4b00d_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings per Share</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Per Share [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EarningsPerShareTextBlock"/>
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    <link:label id="lab_us-gaap_TimingOfTransferOfGoodOrServiceDomain_8f6b9700-2e3d-4e40-9bc2-f2db4ebee5c9_terseLabel_en-US" xlink:label="lab_us-gaap_TimingOfTransferOfGoodOrServiceDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Timing of Transfer of Good or Service [Domain]</link:label>
    <link:label id="lab_us-gaap_TimingOfTransferOfGoodOrServiceDomain_label_en-US" xlink:label="lab_us-gaap_TimingOfTransferOfGoodOrServiceDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Timing of Transfer of Good or Service [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain" xlink:to="lab_us-gaap_TimingOfTransferOfGoodOrServiceDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_SettlementOfGeneralUnsecuredClaims_e5b1f9c7-9786-4bdc-bd61-d9e78014e6ab_terseLabel_en-US" xlink:label="lab_mnk_SettlementOfGeneralUnsecuredClaims" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring Support Agreement, Proposed Settlement of General Unsecured Claims</link:label>
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    <link:label id="lab_mnk_SettlementOfGeneralUnsecuredClaims_documentation_en-US" xlink:label="lab_mnk_SettlementOfGeneralUnsecuredClaims" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Settlement of General Unsecured Claims</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_SettlementOfGeneralUnsecuredClaims" xlink:href="mnk-20220701.xsd#mnk_SettlementOfGeneralUnsecuredClaims"/>
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    <link:label id="lab_us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities_47630f7b-9404-47ac-bf7f-cc13466cf3f0_terseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Repayment of Long-term Debt, Long-term Lease Obligation, and Capital Security</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities_167280aa-57c8-43d6-b00d-d43b363eb87b_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Repayment of external debt</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Repayment of Long-term Debt, Long-term Lease Obligation, and Capital Security</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities" xlink:to="lab_us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityInteractiveDataCurrent_aa3eaa42-17e4-4c0b-8d73-d1af1ac889c4_terseLabel_en-US" xlink:label="lab_dei_EntityInteractiveDataCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Interactive Data Current</link:label>
    <link:label id="lab_dei_EntityInteractiveDataCurrent_label_en-US" xlink:label="lab_dei_EntityInteractiveDataCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Interactive Data Current</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityInteractiveDataCurrent" xlink:to="lab_dei_EntityInteractiveDataCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_FivePointSevenFivePercentNotesMember_ca9f4665-4705-4347-9c06-72924bd66c88_terseLabel_en-US" xlink:label="lab_mnk_FivePointSevenFivePercentNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">5.75% Senior Notes</link:label>
    <link:label id="lab_mnk_FivePointSevenFivePercentNotesMember_label_en-US" xlink:label="lab_mnk_FivePointSevenFivePercentNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Five Point Seven Five Percent Notes [Member]</link:label>
    <link:label id="lab_mnk_FivePointSevenFivePercentNotesMember_documentation_en-US" xlink:label="lab_mnk_FivePointSevenFivePercentNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Five Point Seven Five Percent Notes [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_FivePointSevenFivePercentNotesMember" xlink:href="mnk-20220701.xsd#mnk_FivePointSevenFivePercentNotesMember"/>
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_fac2be04-1075-4983-951c-c9aa724d5818_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fiscal 2025</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finite-Lived Intangible Asset, Expected Amortization, Year Four</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities_label_en-US" xlink:label="lab_us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities"/>
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    <link:label id="lab_us-gaap_DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees_35a35579-f19d-41cf-89a8-48cec8169e91_terseLabel_en-US" xlink:label="lab_us-gaap_DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debtor Reorganization Items, Legal and Advisory Professional Fees</link:label>
    <link:label id="lab_us-gaap_DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees_label_en-US" xlink:label="lab_us-gaap_DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debtor Reorganization Items, Legal and Advisory Professional Fees</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees"/>
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    <link:label id="lab_srt_MinimumMember_529637d2-4dd3-4290-9131-398f8e0c3159_terseLabel_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum</link:label>
    <link:label id="lab_srt_MinimumMember_label_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
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    <link:label id="lab_mnk_SuccessorFreshStartAdjustmentsMember_ed546e7b-ef1a-4299-ac19-3560f7651287_terseLabel_en-US" xlink:label="lab_mnk_SuccessorFreshStartAdjustmentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Successor</link:label>
    <link:label id="lab_mnk_SuccessorFreshStartAdjustmentsMember_label_en-US" xlink:label="lab_mnk_SuccessorFreshStartAdjustmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Successor, Fresh-Start Adjustments [Member]</link:label>
    <link:label id="lab_mnk_SuccessorFreshStartAdjustmentsMember_documentation_en-US" xlink:label="lab_mnk_SuccessorFreshStartAdjustmentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Successor, Fresh-Start Adjustments</link:label>
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    <link:label id="lab_mnk_ReorganizationAdjustmentsDebtTableTextBlock_12220f87-ef8c-4f4c-b596-535138387f14_terseLabel_en-US" xlink:label="lab_mnk_ReorganizationAdjustmentsDebtTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Adjustments, Debt</link:label>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_2b48598b-5479-4632-9bda-fe4ff9344407_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Other Operating Assets and Liabilities, Net</link:label>
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    <link:label id="lab_mnk_EnterpriseValue_e9204352-6d94-4efa-b17c-5743142549bd_terseLabel_en-US" xlink:label="lab_mnk_EnterpriseValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Enterprise Value</link:label>
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    <link:label id="lab_mnk_EnterpriseValue_documentation_en-US" xlink:label="lab_mnk_EnterpriseValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Enterprise Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_EnterpriseValue" xlink:href="mnk-20220701.xsd#mnk_EnterpriseValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_EnterpriseValue" xlink:to="lab_mnk_EnterpriseValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GrossProfit_e2c0a657-98be-4cab-a07d-e687a72fda94_totalLabel_en-US" xlink:label="lab_us-gaap_GrossProfit" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross (loss) profit</link:label>
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    <link:label id="lab_mnk_ReorganizationAdjustmentsToRetainedDeficit_924eb052-a4ce-47d8-bc7c-138181766fe6_terseLabel_en-US" xlink:label="lab_mnk_ReorganizationAdjustmentsToRetainedDeficit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Adjustments to Retained Deficit</link:label>
    <link:label id="lab_mnk_ReorganizationAdjustmentsToRetainedDeficit_label_en-US" xlink:label="lab_mnk_ReorganizationAdjustmentsToRetainedDeficit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Adjustments to Retained Deficit</link:label>
    <link:label id="lab_mnk_ReorganizationAdjustmentsToRetainedDeficit_documentation_en-US" xlink:label="lab_mnk_ReorganizationAdjustmentsToRetainedDeficit" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Adjustments to Retained Deficit</link:label>
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    <link:label id="lab_mnk_OpioidRelatedSettlementUpfrontPayment_c5b10ecf-61e6-41e1-8d26-f8c66b421cf6_terseLabel_en-US" xlink:label="lab_mnk_OpioidRelatedSettlementUpfrontPayment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring Support Agreement Proposed Settlement, Upfront Payment</link:label>
    <link:label id="lab_mnk_OpioidRelatedSettlementUpfrontPayment_label_en-US" xlink:label="lab_mnk_OpioidRelatedSettlementUpfrontPayment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid-Related Settlement, Upfront Payment</link:label>
    <link:label id="lab_mnk_OpioidRelatedSettlementUpfrontPayment_documentation_en-US" xlink:label="lab_mnk_OpioidRelatedSettlementUpfrontPayment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid-Related Settlement, Upfront Payment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_OpioidRelatedSettlementUpfrontPayment" xlink:href="mnk-20220701.xsd#mnk_OpioidRelatedSettlementUpfrontPayment"/>
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    <link:label id="lab_mnk_ActharGelRelatedSettlementPaymentYearFourAndFive_9c30dfa4-81f8-4c3f-aad7-14da1d379e3f_terseLabel_en-US" xlink:label="lab_mnk_ActharGelRelatedSettlementPaymentYearFourAndFive" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel-Related Settlement, Payment Year Three and Four</link:label>
    <link:label id="lab_mnk_ActharGelRelatedSettlementPaymentYearFourAndFive_label_en-US" xlink:label="lab_mnk_ActharGelRelatedSettlementPaymentYearFourAndFive" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel-Related Settlement, Payment Year Four and Five</link:label>
    <link:label id="lab_mnk_ActharGelRelatedSettlementPaymentYearFourAndFive_documentation_en-US" xlink:label="lab_mnk_ActharGelRelatedSettlementPaymentYearFourAndFive" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel-Related Settlement, Payment Year Four and Five</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ActharGelRelatedSettlementPaymentYearFourAndFive" xlink:href="mnk-20220701.xsd#mnk_ActharGelRelatedSettlementPaymentYearFourAndFive"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_ActharGelRelatedSettlementPaymentYearFourAndFive" xlink:to="lab_mnk_ActharGelRelatedSettlementPaymentYearFourAndFive" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DeferredIncomeTaxAssetsNet_a3302195-6025-4048-9565-8ca282bb0343_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxAssetsNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Tax Assets, Net</link:label>
    <link:label id="lab_us-gaap_DeferredIncomeTaxAssetsNet_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxAssetsNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Income Tax Assets, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredIncomeTaxAssetsNet" xlink:to="lab_us-gaap_DeferredIncomeTaxAssetsNet" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_CancellationOfPredecessorEquity_b07cb427-2b2d-4d94-b56b-34606d73d911_terseLabel_en-US" xlink:label="lab_mnk_CancellationOfPredecessorEquity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cancellation of Predecessor equity</link:label>
    <link:label id="lab_mnk_CancellationOfPredecessorEquity_label_en-US" xlink:label="lab_mnk_CancellationOfPredecessorEquity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cancellation of Predecessor equity</link:label>
    <link:label id="lab_mnk_CancellationOfPredecessorEquity_documentation_en-US" xlink:label="lab_mnk_CancellationOfPredecessorEquity" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cancellation of Predecessor equity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_CancellationOfPredecessorEquity" xlink:href="mnk-20220701.xsd#mnk_CancellationOfPredecessorEquity"/>
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    <link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_ba489abb-df5b-461d-a329-09be4fd91599_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Liabilities:</link:label>
    <link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities, Current [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:to="lab_us-gaap_LiabilitiesCurrentAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_IncomeTaxesTable_28d762f1-d4f8-4c17-bee5-5debdefe23b7_terseLabel_en-US" xlink:label="lab_mnk_IncomeTaxesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Taxes [Table]</link:label>
    <link:label id="lab_mnk_IncomeTaxesTable_label_en-US" xlink:label="lab_mnk_IncomeTaxesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Taxes [Table]</link:label>
    <link:label id="lab_mnk_IncomeTaxesTable_documentation_en-US" xlink:label="lab_mnk_IncomeTaxesTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Taxes [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_IncomeTaxesTable" xlink:href="mnk-20220701.xsd#mnk_IncomeTaxesTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_IncomeTaxesTable" xlink:to="lab_mnk_IncomeTaxesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_OpioidRelatedSettlementYearEight_6e91fa2b-f239-4945-8754-befcd185c161_terseLabel_en-US" xlink:label="lab_mnk_OpioidRelatedSettlementYearEight" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring Support Agreement Proposed Settlement, Year Eight</link:label>
    <link:label id="lab_mnk_OpioidRelatedSettlementYearEight_label_en-US" xlink:label="lab_mnk_OpioidRelatedSettlementYearEight" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid-Related Settlement, Year Eight</link:label>
    <link:label id="lab_mnk_OpioidRelatedSettlementYearEight_documentation_en-US" xlink:label="lab_mnk_OpioidRelatedSettlementYearEight" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid-Related Settlement, Year Eight</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_OpioidRelatedSettlementYearEight" xlink:href="mnk-20220701.xsd#mnk_OpioidRelatedSettlementYearEight"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_OpioidRelatedSettlementYearEight" xlink:to="lab_mnk_OpioidRelatedSettlementYearEight" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_72ff6076-e23d-45bc-a640-7ff17c37d929_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Issued During Period, Value, New Issues</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Issued During Period, Value, New Issues</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtDisclosureTextBlock_d75a3fca-f8bd-4fce-acbf-28cff056969b_terseLabel_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Disclosure</link:label>
    <link:label id="lab_us-gaap_DebtDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtDisclosureTextBlock" xlink:to="lab_us-gaap_DebtDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RestructuringPlanDomain_056fcbf9-5f6f-415e-973e-3cbb8711fc96_terseLabel_en-US" xlink:label="lab_us-gaap_RestructuringPlanDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring Plan [Domain]</link:label>
    <link:label id="lab_us-gaap_RestructuringPlanDomain_label_en-US" xlink:label="lab_us-gaap_RestructuringPlanDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring Plan [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestructuringPlanDomain" xlink:to="lab_us-gaap_RestructuringPlanDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_CancellationOfPredecessorEquityShares_ace1a855-db8c-4d5a-a01f-2d4f5932eb30_terseLabel_en-US" xlink:label="lab_mnk_CancellationOfPredecessorEquityShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cancellation of Predecessor equity, Shares</link:label>
    <link:label id="lab_mnk_CancellationOfPredecessorEquityShares_label_en-US" xlink:label="lab_mnk_CancellationOfPredecessorEquityShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cancellation of Predecessor equity, Shares</link:label>
    <link:label id="lab_mnk_CancellationOfPredecessorEquityShares_documentation_en-US" xlink:label="lab_mnk_CancellationOfPredecessorEquityShares" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cancellation of Predecessor equity, Shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_CancellationOfPredecessorEquityShares" xlink:href="mnk-20220701.xsd#mnk_CancellationOfPredecessorEquityShares"/>
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    <link:label id="lab_us-gaap_SharesOutstanding_c039bcb7-0616-4cad-b47d-2d5868caad03_terseLabel_en-US" xlink:label="lab_us-gaap_SharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares, Outstanding</link:label>
    <link:label id="lab_us-gaap_SharesOutstanding_label_en-US" xlink:label="lab_us-gaap_SharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares, Outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharesOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharesOutstanding" xlink:to="lab_us-gaap_SharesOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EnvironmentalRemediationExpense_a8fe1a2c-5b9f-4666-b89f-25e507342c4f_terseLabel_en-US" xlink:label="lab_us-gaap_EnvironmentalRemediationExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Environmental Remediation Expense</link:label>
    <link:label id="lab_us-gaap_EnvironmentalRemediationExpense_label_en-US" xlink:label="lab_us-gaap_EnvironmentalRemediationExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Environmental Remediation Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnvironmentalRemediationExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EnvironmentalRemediationExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EnvironmentalRemediationExpense" xlink:to="lab_us-gaap_EnvironmentalRemediationExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_83bfea8b-31b3-4948-a7ea-3af4a0a71faf_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Components of Income Tax Expense (Benefit)</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromIncomeTaxRefunds_871a7fe0-0775-41d2-b3be-ebf9ca160576_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIncomeTaxRefunds" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from Income Tax Refunds</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIncomeTaxRefunds" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromIncomeTaxRefunds"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIncomeTaxRefunds" xlink:to="lab_us-gaap_ProceedsFromIncomeTaxRefunds" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_SeniorNotesMember_label_en-US" xlink:label="lab_us-gaap_SeniorNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Senior Notes [Member]</link:label>
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    <link:label id="lab_us-gaap_FairValueInputsLevel3Member_46679091-144c-4575-bf4f-b9e96a4118f0_verboseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Level 3</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel3Member"/>
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    <link:label id="lab_us-gaap_InventoryDisclosureTextBlock_ccef17b0-e8fd-4dcb-99c3-bb5ca2846d90_verboseLabel_en-US" xlink:label="lab_us-gaap_InventoryDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inventories</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InventoryDisclosureTextBlock" xlink:to="lab_us-gaap_InventoryDisclosureTextBlock" xlink:type="arc" order="1"/>
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    <link:label id="lab_mnk_PaymentOfAdministrativePriorityAndTradeClaims_label_en-US" xlink:label="lab_mnk_PaymentOfAdministrativePriorityAndTradeClaims" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment of Administrative, Priority and Trade Claims</link:label>
    <link:label id="lab_mnk_PaymentOfAdministrativePriorityAndTradeClaims_documentation_en-US" xlink:label="lab_mnk_PaymentOfAdministrativePriorityAndTradeClaims" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment of Administrative, Priority and Trade Claims</link:label>
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    <link:label id="lab_mnk_AdjustmentsToRetainedDeficitCurrentAssetHeldForSale_426c178f-5dfd-4131-be18-1ffef3dd2de2_terseLabel_en-US" xlink:label="lab_mnk_AdjustmentsToRetainedDeficitCurrentAssetHeldForSale" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments to Retained Deficit, Current Asset Held for Sale</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_mnk_AdjustmentsToRetainedDeficitCurrentAssetHeldForSale" xlink:href="mnk-20220701.xsd#mnk_AdjustmentsToRetainedDeficitCurrentAssetHeldForSale"/>
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    <link:label id="lab_mnk_PaymentOfNoteholderConsentFees_5cb3db3a-62e2-418d-8760-f28389e6e0aa_terseLabel_en-US" xlink:label="lab_mnk_PaymentOfNoteholderConsentFees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment of Noteholder Consent Fees</link:label>
    <link:label id="lab_mnk_PaymentOfNoteholderConsentFees_label_en-US" xlink:label="lab_mnk_PaymentOfNoteholderConsentFees" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment of Noteholder Consent Fees</link:label>
    <link:label id="lab_mnk_PaymentOfNoteholderConsentFees_documentation_en-US" xlink:label="lab_mnk_PaymentOfNoteholderConsentFees" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment of Noteholder Consent Fees</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_PaymentOfNoteholderConsentFees" xlink:href="mnk-20220701.xsd#mnk_PaymentOfNoteholderConsentFees"/>
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    <link:label id="lab_mnk_ScheduleOfLiabilitiesSubjectToCompromiseTable_9bed0ef2-17ff-41e9-ab9e-4e52af95de09_terseLabel_en-US" xlink:label="lab_mnk_ScheduleOfLiabilitiesSubjectToCompromiseTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Liabilities Subject to Compromise [Table]</link:label>
    <link:label id="lab_mnk_ScheduleOfLiabilitiesSubjectToCompromiseTable_label_en-US" xlink:label="lab_mnk_ScheduleOfLiabilitiesSubjectToCompromiseTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Liabilities Subject to Compromise [Table]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_mnk_ScheduleOfLiabilitiesSubjectToCompromiseTable" xlink:href="mnk-20220701.xsd#mnk_ScheduleOfLiabilitiesSubjectToCompromiseTable"/>
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    <link:label id="lab_mnk_AccruedEnvironmentalLossContingenciesMember_4d56efe5-6e21-4094-86e5-69d61f605ea9_terseLabel_en-US" xlink:label="lab_mnk_AccruedEnvironmentalLossContingenciesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued Environmental Loss Contingencies</link:label>
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    <link:label id="lab_mnk_StrataGraftPRVMember_b418aa83-00cc-40a9-ab5f-2b4f36d5de1a_terseLabel_en-US" xlink:label="lab_mnk_StrataGraftPRVMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">StrataGraft PRV</link:label>
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    <link:label id="lab_mnk_StrataGraftPRVMember_documentation_en-US" xlink:label="lab_mnk_StrataGraftPRVMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">StrataGraft PRV</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock_41a7ffbc-999c-4f42-87ff-b1d5b2d91798_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Net Sales from External Customers by Products</link:label>
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    <link:label id="lab_mnk_AdjustmentToRetainedDeficitOtherAssetsAndLiabilities_78e2cfea-90e8-4fe8-9b34-2590b57920a6_terseLabel_en-US" xlink:label="lab_mnk_AdjustmentToRetainedDeficitOtherAssetsAndLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustment to Retained Deficit, Other Assets and Liabilities</link:label>
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    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperations_00bbc110-6def-4e99-8d60-a7c0ba84cd10_totalLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loss from continuing operations</link:label>
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    <link:label id="lab_mnk_StrataGraftMember_documentation_en-US" xlink:label="lab_mnk_StrataGraftMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">StrataGraft [Member]</link:label>
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    <link:label id="lab_us-gaap_FreshStartAdjustmentsTable_9afcb86d-984e-4d95-ba91-2f559447ca49_terseLabel_en-US" xlink:label="lab_us-gaap_FreshStartAdjustmentsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization, Chapter 11 [Table]</link:label>
    <link:label id="lab_us-gaap_FreshStartAdjustmentsTable_label_en-US" xlink:label="lab_us-gaap_FreshStartAdjustmentsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization, Chapter 11 [Table]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccruedIncomeTaxesNoncurrent" xlink:to="lab_us-gaap_AccruedIncomeTaxesNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_CashPaymentsToSettleAmountsPerThePlan_9c61f3ef-3d58-47e8-82a1-c97ae736d076_terseLabel_en-US" xlink:label="lab_mnk_CashPaymentsToSettleAmountsPerThePlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash payments to settle amounts per the Plan</link:label>
    <link:label id="lab_mnk_CashPaymentsToSettleAmountsPerThePlan_label_en-US" xlink:label="lab_mnk_CashPaymentsToSettleAmountsPerThePlan" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash payments to settle amounts per the Plan</link:label>
    <link:label id="lab_mnk_CashPaymentsToSettleAmountsPerThePlan_documentation_en-US" xlink:label="lab_mnk_CashPaymentsToSettleAmountsPerThePlan" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash payments to settle amounts per the Plan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_CashPaymentsToSettleAmountsPerThePlan" xlink:href="mnk-20220701.xsd#mnk_CashPaymentsToSettleAmountsPerThePlan"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_CashPaymentsToSettleAmountsPerThePlan" xlink:to="lab_mnk_CashPaymentsToSettleAmountsPerThePlan" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_CashPaidReorganizationItems_ba2a3db9-f78c-42d4-920e-7bd0bbad9306_terseLabel_en-US" xlink:label="lab_mnk_CashPaidReorganizationItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash Paid, Reorganization items</link:label>
    <link:label id="lab_mnk_CashPaidReorganizationItems_label_en-US" xlink:label="lab_mnk_CashPaidReorganizationItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash Paid, Reorganization items</link:label>
    <link:label id="lab_mnk_CashPaidReorganizationItems_documentation_en-US" xlink:label="lab_mnk_CashPaidReorganizationItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash Paid, Reorganization items</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_CashPaidReorganizationItems" xlink:href="mnk-20220701.xsd#mnk_CashPaidReorganizationItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_CashPaidReorganizationItems" xlink:to="lab_mnk_CashPaidReorganizationItems" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_AccruedAndOtherCurrentLiabilitiesReorganizationAdjustment_f4d64ca4-7bcc-4af2-be41-a3ea612ab13a_terseLabel_en-US" xlink:label="lab_mnk_AccruedAndOtherCurrentLiabilitiesReorganizationAdjustment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued and Other Current Liabilities, Reorganization Adjustment</link:label>
    <link:label id="lab_mnk_AccruedAndOtherCurrentLiabilitiesReorganizationAdjustment_label_en-US" xlink:label="lab_mnk_AccruedAndOtherCurrentLiabilitiesReorganizationAdjustment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued and Other Current Liabilities, Reorganization Adjustment</link:label>
    <link:label id="lab_mnk_AccruedAndOtherCurrentLiabilitiesReorganizationAdjustment_documentation_en-US" xlink:label="lab_mnk_AccruedAndOtherCurrentLiabilitiesReorganizationAdjustment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued and Other Current Liabilities, Reorganization Adjustment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_AccruedAndOtherCurrentLiabilitiesReorganizationAdjustment" xlink:href="mnk-20220701.xsd#mnk_AccruedAndOtherCurrentLiabilitiesReorganizationAdjustment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_AccruedAndOtherCurrentLiabilitiesReorganizationAdjustment" xlink:to="lab_mnk_AccruedAndOtherCurrentLiabilitiesReorganizationAdjustment" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsOfDebtIssuanceCosts_ff8f4a06-a7ef-4f7b-b842-72a6b28132d3_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtIssuanceCosts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments of Debt Issuance Costs</link:label>
    <link:label id="lab_us-gaap_PaymentsOfDebtIssuanceCosts_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtIssuanceCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments of Debt Issuance Costs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDebtIssuanceCosts" xlink:to="lab_us-gaap_PaymentsOfDebtIssuanceCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_NonOperatingAssetsNetMember_c79a8572-fd98-4a57-8f03-c766bcd36465_terseLabel_en-US" xlink:label="lab_mnk_NonOperatingAssetsNetMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-operating assets, net</link:label>
    <link:label id="lab_mnk_NonOperatingAssetsNetMember_label_en-US" xlink:label="lab_mnk_NonOperatingAssetsNetMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-operating assets, net [Member]</link:label>
    <link:label id="lab_mnk_NonOperatingAssetsNetMember_documentation_en-US" xlink:label="lab_mnk_NonOperatingAssetsNetMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-operating assets, net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_NonOperatingAssetsNetMember" xlink:href="mnk-20220701.xsd#mnk_NonOperatingAssetsNetMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_NonOperatingAssetsNetMember" xlink:to="lab_mnk_NonOperatingAssetsNetMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_FreshStartAdjustmentSpareParts_d20251ab-31a3-4af7-977a-8c3aed13a4e1_terseLabel_en-US" xlink:label="lab_mnk_FreshStartAdjustmentSpareParts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustment, Spare Parts</link:label>
    <link:label id="lab_mnk_FreshStartAdjustmentSpareParts_label_en-US" xlink:label="lab_mnk_FreshStartAdjustmentSpareParts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustment, Spare Parts</link:label>
    <link:label id="lab_mnk_FreshStartAdjustmentSpareParts_documentation_en-US" xlink:label="lab_mnk_FreshStartAdjustmentSpareParts" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustment, Spare Parts</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_FreshStartAdjustmentSpareParts" xlink:href="mnk-20220701.xsd#mnk_FreshStartAdjustmentSpareParts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_FreshStartAdjustmentSpareParts" xlink:to="lab_mnk_FreshStartAdjustmentSpareParts" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProductConcentrationRiskMember_96375bb1-47a5-4324-9565-0e636de12be0_terseLabel_en-US" xlink:label="lab_us-gaap_ProductConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Product Concentration Risk</link:label>
    <link:label id="lab_us-gaap_ProductConcentrationRiskMember_label_en-US" xlink:label="lab_us-gaap_ProductConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Product Concentration Risk [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductConcentrationRiskMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProductConcentrationRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProductConcentrationRiskMember" xlink:to="lab_us-gaap_ProductConcentrationRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfDebt_22bc3eca-05e5-4d9b-949f-3f9abc13d57e_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of external debt</link:label>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfDebt_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from Issuance of Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromIssuanceOfDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceOfDebt" xlink:to="lab_us-gaap_ProceedsFromIssuanceOfDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_IncreaseDecreaseInMedicaidLawsuit_4c0a3b6f-111f-4747-8f5f-ca22ca1fa0e3_terseLabel_en-US" xlink:label="lab_mnk_IncreaseDecreaseInMedicaidLawsuit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel-Related Settlement</link:label>
    <link:label id="lab_mnk_IncreaseDecreaseInMedicaidLawsuit_label_en-US" xlink:label="lab_mnk_IncreaseDecreaseInMedicaidLawsuit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Medicaid lawsuit</link:label>
    <link:label id="lab_mnk_IncreaseDecreaseInMedicaidLawsuit_documentation_en-US" xlink:label="lab_mnk_IncreaseDecreaseInMedicaidLawsuit" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Medicaid lawsuit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_IncreaseDecreaseInMedicaidLawsuit" xlink:href="mnk-20220701.xsd#mnk_IncreaseDecreaseInMedicaidLawsuit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_IncreaseDecreaseInMedicaidLawsuit" xlink:to="lab_mnk_IncreaseDecreaseInMedicaidLawsuit" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_MedianMember_3c176c12-6e36-4746-b881-54b5813050f2_terseLabel_en-US" xlink:label="lab_srt_MedianMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Median</link:label>
    <link:label id="lab_srt_MedianMember_label_en-US" xlink:label="lab_srt_MedianMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Median [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MedianMember" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MedianMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MedianMember" xlink:to="lab_srt_MedianMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_OwnershipAxis_77d2179b-a418-41af-9c69-00e8ffdab689_terseLabel_en-US" xlink:label="lab_srt_OwnershipAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ownership [Axis]</link:label>
    <link:label id="lab_srt_OwnershipAxis_label_en-US" xlink:label="lab_srt_OwnershipAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ownership [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_OwnershipAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_OwnershipAxis" xlink:to="lab_srt_OwnershipAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_FreshStartAdjustmentsIncomeTaxBenefit_5e193d75-771d-42f3-b561-bb3d69206515_terseLabel_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsIncomeTaxBenefit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, Income Tax Benefit</link:label>
    <link:label id="lab_mnk_FreshStartAdjustmentsIncomeTaxBenefit_label_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsIncomeTaxBenefit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, Income Tax Benefit</link:label>
    <link:label id="lab_mnk_FreshStartAdjustmentsIncomeTaxBenefit_documentation_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsIncomeTaxBenefit" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, Income Tax Benefit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_FreshStartAdjustmentsIncomeTaxBenefit" xlink:href="mnk-20220701.xsd#mnk_FreshStartAdjustmentsIncomeTaxBenefit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_FreshStartAdjustmentsIncomeTaxBenefit" xlink:to="lab_mnk_FreshStartAdjustmentsIncomeTaxBenefit" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_LegalEntityAxis_2ca7fec5-3bf0-4693-9d3d-fd19cf403c72_terseLabel_en-US" xlink:label="lab_dei_LegalEntityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Legal Entity [Axis]</link:label>
    <link:label id="lab_dei_LegalEntityAxis_label_en-US" xlink:label="lab_dei_LegalEntityAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Legal Entity [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LegalEntityAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LegalEntityAxis" xlink:to="lab_dei_LegalEntityAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_DistributorConcentrationRiskMember_03732ed7-664b-4e21-ad9f-bde92f0cfdea_terseLabel_en-US" xlink:label="lab_mnk_DistributorConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Distributor Concentration Risk</link:label>
    <link:label id="lab_mnk_DistributorConcentrationRiskMember_label_en-US" xlink:label="lab_mnk_DistributorConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Distributor Concentration Risk [Member]</link:label>
    <link:label id="lab_mnk_DistributorConcentrationRiskMember_documentation_en-US" xlink:label="lab_mnk_DistributorConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Distributor Concentration Risk [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_DistributorConcentrationRiskMember" xlink:href="mnk-20220701.xsd#mnk_DistributorConcentrationRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_DistributorConcentrationRiskMember" xlink:to="lab_mnk_DistributorConcentrationRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementClassOfStockAxis_ad813bb8-c616-4af5-9605-65b8d830e752_terseLabel_en-US" xlink:label="lab_us-gaap_StatementClassOfStockAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Stock [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementClassOfStockAxis_label_en-US" xlink:label="lab_us-gaap_StatementClassOfStockAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Stock [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementClassOfStockAxis" xlink:to="lab_us-gaap_StatementClassOfStockAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_FreshStartAdjustmentsAccumulatedOtherComprehensiveIncome_c44f46ee-d251-4a37-bdca-76483bebb213_terseLabel_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsAccumulatedOtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, Accumulated Other Comprehensive Income</link:label>
    <link:label id="lab_mnk_FreshStartAdjustmentsAccumulatedOtherComprehensiveIncome_label_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsAccumulatedOtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, Accumulated Other Comprehensive Income</link:label>
    <link:label id="lab_mnk_FreshStartAdjustmentsAccumulatedOtherComprehensiveIncome_documentation_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsAccumulatedOtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, Accumulated Other Comprehensive Income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_FreshStartAdjustmentsAccumulatedOtherComprehensiveIncome" xlink:href="mnk-20220701.xsd#mnk_FreshStartAdjustmentsAccumulatedOtherComprehensiveIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_FreshStartAdjustmentsAccumulatedOtherComprehensiveIncome" xlink:to="lab_mnk_FreshStartAdjustmentsAccumulatedOtherComprehensiveIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TreasuryStockShares_2810e1bc-3b17-4d9d-a558-a4add3c029ae_terseLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ordinary shares held in treasury at cost (in shares)</link:label>
    <link:label id="lab_us-gaap_TreasuryStockShares_564d0107-6a48-439e-8e7f-dd2b2bb2e0fb_periodStartLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockShares" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Beginning balance, treasury shares (in shares)</link:label>
    <link:label id="lab_us-gaap_TreasuryStockShares_a09ab374-4663-46da-9b65-e19a0e983eec_periodEndLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockShares" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ending balance, treasury shares (in shares)</link:label>
    <link:label id="lab_us-gaap_TreasuryStockShares_label_en-US" xlink:label="lab_us-gaap_TreasuryStockShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Treasury Stock, Shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockShares" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockShares"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TreasuryStockShares" xlink:to="lab_us-gaap_TreasuryStockShares" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_OpioidsMember_a4482c7a-aac0-4d3c-8f54-a9c82ca3bcf4_terseLabel_en-US" xlink:label="lab_mnk_OpioidsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioids</link:label>
    <link:label id="lab_mnk_OpioidsMember_label_en-US" xlink:label="lab_mnk_OpioidsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioids [Member]</link:label>
    <link:label id="lab_mnk_OpioidsMember_documentation_en-US" xlink:label="lab_mnk_OpioidsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioids</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_OpioidsMember" xlink:href="mnk-20220701.xsd#mnk_OpioidsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_OpioidsMember" xlink:to="lab_mnk_OpioidsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtLongtermAndShorttermCombinedAmount_948cfb0f-d647-4737-aac4-5cf63f04fc56_terseLabel_en-US" xlink:label="lab_us-gaap_DebtLongtermAndShorttermCombinedAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total Debt</link:label>
    <link:label id="lab_us-gaap_DebtLongtermAndShorttermCombinedAmount_label_en-US" xlink:label="lab_us-gaap_DebtLongtermAndShorttermCombinedAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt, Long-term and Short-term, Combined Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtLongtermAndShorttermCombinedAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount" xlink:to="lab_us-gaap_DebtLongtermAndShorttermCombinedAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ClassOfWarrantOrRightOutstanding_3ae0870c-1845-475b-aeff-c5525e6077ba_terseLabel_en-US" xlink:label="lab_us-gaap_ClassOfWarrantOrRightOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Warrant or Right, Outstanding</link:label>
    <link:label id="lab_us-gaap_ClassOfWarrantOrRightOutstanding_label_en-US" xlink:label="lab_us-gaap_ClassOfWarrantOrRightOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Warrant or Right, Outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfWarrantOrRightOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ClassOfWarrantOrRightOutstanding" xlink:to="lab_us-gaap_ClassOfWarrantOrRightOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ReinstatementOfVariousSuccessorObligationsFromLSTC_87a87300-7168-4155-b19c-38d0e8574ffe_terseLabel_en-US" xlink:label="lab_mnk_ReinstatementOfVariousSuccessorObligationsFromLSTC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reinstatement of various successor obligations from LSTC</link:label>
    <link:label id="lab_mnk_ReinstatementOfVariousSuccessorObligationsFromLSTC_label_en-US" xlink:label="lab_mnk_ReinstatementOfVariousSuccessorObligationsFromLSTC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reinstatement of various successor obligations from LSTC</link:label>
    <link:label id="lab_mnk_ReinstatementOfVariousSuccessorObligationsFromLSTC_documentation_en-US" xlink:label="lab_mnk_ReinstatementOfVariousSuccessorObligationsFromLSTC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reinstatement of various successor obligations from LSTC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ReinstatementOfVariousSuccessorObligationsFromLSTC" xlink:href="mnk-20220701.xsd#mnk_ReinstatementOfVariousSuccessorObligationsFromLSTC"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_ReinstatementOfVariousSuccessorObligationsFromLSTC" xlink:to="lab_mnk_ReinstatementOfVariousSuccessorObligationsFromLSTC" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ScheduleofLongtermDebtincludingCapitalLeaseObligationLineItems_cb72e569-dbd9-4c5a-b58d-6624f9dfe2fe_terseLabel_en-US" xlink:label="lab_mnk_ScheduleofLongtermDebtincludingCapitalLeaseObligationLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Long-term Debt including Capital Lease Obligation [Line Items]</link:label>
    <link:label id="lab_mnk_ScheduleofLongtermDebtincludingCapitalLeaseObligationLineItems_label_en-US" xlink:label="lab_mnk_ScheduleofLongtermDebtincludingCapitalLeaseObligationLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Long-term Debt including Capital Lease Obligation [Line Items]</link:label>
    <link:label id="lab_mnk_ScheduleofLongtermDebtincludingCapitalLeaseObligationLineItems_documentation_en-US" xlink:label="lab_mnk_ScheduleofLongtermDebtincludingCapitalLeaseObligationLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Line Items] for Schedule of Long-term Debt including Capital Lease Obligation [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ScheduleofLongtermDebtincludingCapitalLeaseObligationLineItems" xlink:href="mnk-20220701.xsd#mnk_ScheduleofLongtermDebtincludingCapitalLeaseObligationLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_ScheduleofLongtermDebtincludingCapitalLeaseObligationLineItems" xlink:to="lab_mnk_ScheduleofLongtermDebtincludingCapitalLeaseObligationLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_CompletedTechnologyMember_feb5de4e-0253-465d-83fd-55c64c467f85_terseLabel_en-US" xlink:label="lab_mnk_CompletedTechnologyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Completed Technology</link:label>
    <link:label id="lab_mnk_CompletedTechnologyMember_label_en-US" xlink:label="lab_mnk_CompletedTechnologyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Completed Technology [Member]</link:label>
    <link:label id="lab_mnk_CompletedTechnologyMember_documentation_en-US" xlink:label="lab_mnk_CompletedTechnologyMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Completed Technology</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_CompletedTechnologyMember" xlink:href="mnk-20220701.xsd#mnk_CompletedTechnologyMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_CompletedTechnologyMember" xlink:to="lab_mnk_CompletedTechnologyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeTaxAuthorityAxis_7135a8f7-03c1-4b36-8dcc-2b5f6909d8dc_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxAuthorityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Authority [Axis]</link:label>
    <link:label id="lab_us-gaap_IncomeTaxAuthorityAxis_label_en-US" xlink:label="lab_us-gaap_IncomeTaxAuthorityAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Authority [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis" xlink:to="lab_us-gaap_IncomeTaxAuthorityAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InventoryWorkInProcessNetOfReserves_4b7fa07e-6668-4299-b207-8056ff85240d_terseLabel_en-US" xlink:label="lab_us-gaap_InventoryWorkInProcessNetOfReserves" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Work in process</link:label>
    <link:label id="lab_us-gaap_InventoryWorkInProcessNetOfReserves_label_en-US" xlink:label="lab_us-gaap_InventoryWorkInProcessNetOfReserves" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inventory, Work in Process, Net of Reserves</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWorkInProcessNetOfReserves" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryWorkInProcessNetOfReserves"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InventoryWorkInProcessNetOfReserves" xlink:to="lab_us-gaap_InventoryWorkInProcessNetOfReserves" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_AdjustedEnterpriseValue_bd1f243b-2808-419c-b801-422177b851c5_terseLabel_en-US" xlink:label="lab_mnk_AdjustedEnterpriseValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjusted Enterprise Value</link:label>
    <link:label id="lab_mnk_AdjustedEnterpriseValue_label_en-US" xlink:label="lab_mnk_AdjustedEnterpriseValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjusted Enterprise Value</link:label>
    <link:label id="lab_mnk_AdjustedEnterpriseValue_documentation_en-US" xlink:label="lab_mnk_AdjustedEnterpriseValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjusted Enterprise Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_AdjustedEnterpriseValue" xlink:href="mnk-20220701.xsd#mnk_AdjustedEnterpriseValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_AdjustedEnterpriseValue" xlink:to="lab_mnk_AdjustedEnterpriseValue" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_FreshStartAdjustmentsIntangibleAssetsNet_ee4c69f4-4b54-41cc-b1b8-d7511e23e6b1_terseLabel_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsIntangibleAssetsNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, Intangible assets, net</link:label>
    <link:label id="lab_mnk_FreshStartAdjustmentsIntangibleAssetsNet_label_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsIntangibleAssetsNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, Intangible assets, net</link:label>
    <link:label id="lab_mnk_FreshStartAdjustmentsIntangibleAssetsNet_documentation_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsIntangibleAssetsNet" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, Intangible assets, net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_FreshStartAdjustmentsIntangibleAssetsNet" xlink:href="mnk-20220701.xsd#mnk_FreshStartAdjustmentsIntangibleAssetsNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_FreshStartAdjustmentsIntangibleAssetsNet" xlink:to="lab_mnk_FreshStartAdjustmentsIntangibleAssetsNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_d5d4e570-27e9-4ab9-8614-4ea07d9cbd2e_terseLabel_en-US" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Prepaid expenses and other current assets</link:label>
    <link:label id="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_label_en-US" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Prepaid Expense and Other Assets, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:to="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityDomain_a74cbedd-d301-492f-a91a-09a8eeeae6d0_terseLabel_en-US" xlink:label="lab_dei_EntityDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity [Domain]</link:label>
    <link:label id="lab_dei_EntityDomain_label_en-US" xlink:label="lab_dei_EntityDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityDomain" xlink:to="lab_dei_EntityDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_OpioidWarrantsParValue_05ec2e0b-2fc0-4c22-944b-5b29d9de1de6_terseLabel_en-US" xlink:label="lab_mnk_OpioidWarrantsParValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid Warrants, Par value</link:label>
    <link:label id="lab_mnk_OpioidWarrantsParValue_label_en-US" xlink:label="lab_mnk_OpioidWarrantsParValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid Warrants, Par value</link:label>
    <link:label id="lab_mnk_OpioidWarrantsParValue_documentation_en-US" xlink:label="lab_mnk_OpioidWarrantsParValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid Warrants, Par value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_OpioidWarrantsParValue" xlink:href="mnk-20220701.xsd#mnk_OpioidWarrantsParValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_OpioidWarrantsParValue" xlink:to="lab_mnk_OpioidWarrantsParValue" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_OptionAMember_e4882996-65a9-43c6-bc58-e6ea41b5fe58_terseLabel_en-US" xlink:label="lab_mnk_OptionAMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Option A</link:label>
    <link:label id="lab_mnk_OptionAMember_label_en-US" xlink:label="lab_mnk_OptionAMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Option A [Member]</link:label>
    <link:label id="lab_mnk_OptionAMember_documentation_en-US" xlink:label="lab_mnk_OptionAMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Option A</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_OptionAMember" xlink:href="mnk-20220701.xsd#mnk_OptionAMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_OptionAMember" xlink:to="lab_mnk_OptionAMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable_5cc9f10f-907f-49e5-a29e-65b05ad96922_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income taxes</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable" xlink:to="lab_us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_AdjustmentToRetainedDeficitDebt_63f34e1c-72a2-4126-8d68-40e6b57ab70a_terseLabel_en-US" xlink:label="lab_mnk_AdjustmentToRetainedDeficitDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustment to Retained Deficit, Debt</link:label>
    <link:label id="lab_mnk_AdjustmentToRetainedDeficitDebt_label_en-US" xlink:label="lab_mnk_AdjustmentToRetainedDeficitDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustment to Retained Deficit, Debt</link:label>
    <link:label id="lab_mnk_AdjustmentToRetainedDeficitDebt_documentation_en-US" xlink:label="lab_mnk_AdjustmentToRetainedDeficitDebt" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustment to Retained Deficit, Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_AdjustmentToRetainedDeficitDebt" xlink:href="mnk-20220701.xsd#mnk_AdjustmentToRetainedDeficitDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_AdjustmentToRetainedDeficitDebt" xlink:to="lab_mnk_AdjustmentToRetainedDeficitDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InventoryFinishedGoodsNetOfReserves_60b250f2-f5d0-45a9-ac71-fa2109cdfb56_terseLabel_en-US" xlink:label="lab_us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finished goods</link:label>
    <link:label id="lab_us-gaap_InventoryFinishedGoodsNetOfReserves_label_en-US" xlink:label="lab_us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inventory, Finished Goods, Net of Reserves</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:to="lab_us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_GuarantorObligationsObligationTerm_7e0d43ba-13b3-4b1f-b216-f68fd04434be_terseLabel_en-US" xlink:label="lab_mnk_GuarantorObligationsObligationTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Guarantor obligations, obligation term</link:label>
    <link:label id="lab_mnk_GuarantorObligationsObligationTerm_label_en-US" xlink:label="lab_mnk_GuarantorObligationsObligationTerm" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Guarantor Obligations, Obligation Term</link:label>
    <link:label id="lab_mnk_GuarantorObligationsObligationTerm_documentation_en-US" xlink:label="lab_mnk_GuarantorObligationsObligationTerm" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Guarantor Obligations, Obligation Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_GuarantorObligationsObligationTerm" xlink:href="mnk-20220701.xsd#mnk_GuarantorObligationsObligationTerm"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_GuarantorObligationsObligationTerm" xlink:to="lab_mnk_GuarantorObligationsObligationTerm" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ScheduleofIntangibleAssetbyMajorClassLineItems_0a38921e-99d2-43d3-b36d-49df12122d27_terseLabel_en-US" xlink:label="lab_mnk_ScheduleofIntangibleAssetbyMajorClassLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Intangible Asset by Major Class [Line Items]</link:label>
    <link:label id="lab_mnk_ScheduleofIntangibleAssetbyMajorClassLineItems_label_en-US" xlink:label="lab_mnk_ScheduleofIntangibleAssetbyMajorClassLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Intangible Asset by Major Class [Line Items]</link:label>
    <link:label id="lab_mnk_ScheduleofIntangibleAssetbyMajorClassLineItems_documentation_en-US" xlink:label="lab_mnk_ScheduleofIntangibleAssetbyMajorClassLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Line Items] for Schedule of Intangible Asset by Major Class</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ScheduleofIntangibleAssetbyMajorClassLineItems" xlink:href="mnk-20220701.xsd#mnk_ScheduleofIntangibleAssetbyMajorClassLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_ScheduleofIntangibleAssetbyMajorClassLineItems" xlink:to="lab_mnk_ScheduleofIntangibleAssetbyMajorClassLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ChangeInEstimateFreshStart_0d759048-e9da-4fbb-b21a-769c040084aa_terseLabel_en-US" xlink:label="lab_mnk_ChangeInEstimateFreshStart" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in estimate</link:label>
    <link:label id="lab_mnk_ChangeInEstimateFreshStart_label_en-US" xlink:label="lab_mnk_ChangeInEstimateFreshStart" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in Estimate, Fresh-Start</link:label>
    <link:label id="lab_mnk_ChangeInEstimateFreshStart_documentation_en-US" xlink:label="lab_mnk_ChangeInEstimateFreshStart" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in Estimate, Fresh-Start</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ChangeInEstimateFreshStart" xlink:href="mnk-20220701.xsd#mnk_ChangeInEstimateFreshStart"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_ChangeInEstimateFreshStart" xlink:to="lab_mnk_ChangeInEstimateFreshStart" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ConsolidationItemsDomain_da66c5dc-2c91-476d-89f6-47d3961e4efb_terseLabel_en-US" xlink:label="lab_srt_ConsolidationItemsDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consolidation Items [Domain]</link:label>
    <link:label id="lab_srt_ConsolidationItemsDomain_label_en-US" xlink:label="lab_srt_ConsolidationItemsDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consolidation Items [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidationItemsDomain" xlink:to="lab_srt_ConsolidationItemsDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_1c7be3b7-ba30-4704-88aa-5094835bbe21_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Hierarchy and NAV [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_label_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Hierarchy and NAV [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentQuarterlyReport_54221fe0-d2a5-4cc4-91eb-caa887805c0f_terseLabel_en-US" xlink:label="lab_dei_DocumentQuarterlyReport" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Quarterly Report</link:label>
    <link:label id="lab_dei_DocumentQuarterlyReport_label_en-US" xlink:label="lab_dei_DocumentQuarterlyReport" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Quarterly Report</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentQuarterlyReport"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentQuarterlyReport" xlink:to="lab_dei_DocumentQuarterlyReport" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsForRestructuring_d9740585-5183-46a3-ba6a-c56599c82e30_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForRestructuring" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash payments</link:label>
    <link:label id="lab_us-gaap_PaymentsForRestructuring_label_en-US" xlink:label="lab_us-gaap_PaymentsForRestructuring" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments for Restructuring</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRestructuring" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsForRestructuring"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForRestructuring" xlink:to="lab_us-gaap_PaymentsForRestructuring" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_TerlipressinContingentConsideration_86159ecf-7c79-4267-a0d9-8fb850fa1ca3_terseLabel_en-US" xlink:label="lab_mnk_TerlipressinContingentConsideration" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Terlipressin Contingent Consideration</link:label>
    <link:label id="lab_mnk_TerlipressinContingentConsideration_label_en-US" xlink:label="lab_mnk_TerlipressinContingentConsideration" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Terlipressin Contingent Consideration</link:label>
    <link:label id="lab_mnk_TerlipressinContingentConsideration_documentation_en-US" xlink:label="lab_mnk_TerlipressinContingentConsideration" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Terlipressin Contingent Consideration</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_TerlipressinContingentConsideration" xlink:href="mnk-20220701.xsd#mnk_TerlipressinContingentConsideration"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_TerlipressinContingentConsideration" xlink:to="lab_mnk_TerlipressinContingentConsideration" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_SuccessFeesForProfessionals_0e3b73b1-0d1b-4b2b-b8f2-5ea8f2354402_terseLabel_en-US" xlink:label="lab_mnk_SuccessFeesForProfessionals" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Success fees for professionals</link:label>
    <link:label id="lab_mnk_SuccessFeesForProfessionals_label_en-US" xlink:label="lab_mnk_SuccessFeesForProfessionals" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Success fees for professionals</link:label>
    <link:label id="lab_mnk_SuccessFeesForProfessionals_documentation_en-US" xlink:label="lab_mnk_SuccessFeesForProfessionals" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Success fees for professionals</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_SuccessFeesForProfessionals" xlink:href="mnk-20220701.xsd#mnk_SuccessFeesForProfessionals"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_SuccessFeesForProfessionals" xlink:to="lab_mnk_SuccessFeesForProfessionals" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ReorganizationsAbstract_label_en-US" xlink:label="lab_us-gaap_ReorganizationsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganizations [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReorganizationsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReorganizationsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReorganizationsAbstract" xlink:to="lab_us-gaap_ReorganizationsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockMember_51821a4e-d57e-48fe-8020-c5f3cfc4eb6d_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ordinary Shares</link:label>
    <link:label id="lab_us-gaap_CommonStockMember_label_en-US" xlink:label="lab_us-gaap_CommonStockMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common Stock [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockMember" xlink:to="lab_us-gaap_CommonStockMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_VariableRateAxis_ee1a5e57-e681-4098-b632-65f1525c2f5e_terseLabel_en-US" xlink:label="lab_us-gaap_VariableRateAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable Rate [Axis]</link:label>
    <link:label id="lab_us-gaap_VariableRateAxis_label_en-US" xlink:label="lab_us-gaap_VariableRateAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable Rate [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableRateAxis" xlink:to="lab_us-gaap_VariableRateAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SegmentReportingDisclosureTextBlock_4fba12b4-2776-4b5d-9b5b-d6ac3cf5e65f_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment Data</link:label>
    <link:label id="lab_us-gaap_SegmentReportingDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_SegmentReportingDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment Reporting Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingDisclosureTextBlock" xlink:to="lab_us-gaap_SegmentReportingDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OperatingIncomeLoss_8243b272-27bd-40cc-be33-6e621c63b7df_totalLabel_en-US" xlink:label="lab_us-gaap_OperatingIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating (loss) income</link:label>
    <link:label id="lab_us-gaap_OperatingIncomeLoss_1c27dcf8-2923-4bc9-b761-2ebc9312087d_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Income (Loss)</link:label>
    <link:label id="lab_us-gaap_OperatingIncomeLoss_label_en-US" xlink:label="lab_us-gaap_OperatingIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Income (Loss)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingIncomeLoss" xlink:to="lab_us-gaap_OperatingIncomeLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_APIMember_3ca97b11-2113-44dc-9d7a-be3103ccc2d1_terseLabel_en-US" xlink:label="lab_mnk_APIMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">API</link:label>
    <link:label id="lab_mnk_APIMember_label_en-US" xlink:label="lab_mnk_APIMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">API [Member]</link:label>
    <link:label id="lab_mnk_APIMember_documentation_en-US" xlink:label="lab_mnk_APIMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">API</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_APIMember" xlink:href="mnk-20220701.xsd#mnk_APIMember"/>
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    <link:label id="lab_mnk_OthersMember_c24bdbbd-8d97-4925-91ca-12624ffc768d_terseLabel_en-US" xlink:label="lab_mnk_OthersMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Others</link:label>
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_13eef072-f8b2-479d-957e-a6abbacb2ae8_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fiscal 2023</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentAbstract_66b8eaa2-083d-4d97-9418-50b27f2d951c_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment [Abstract]</link:label>
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    <link:label id="lab_us-gaap_ShareBasedCompensation_46b529c1-1127-460e-89f5-620e899d22a4_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based compensation</link:label>
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    <link:label id="lab_us-gaap_Depreciation_label_en-US" xlink:label="lab_us-gaap_Depreciation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Depreciation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Depreciation" xlink:to="lab_us-gaap_Depreciation" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LiabilitiesSubjectToCompromise_506a594c-4b62-4f13-b817-6caed03fd4b6_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesSubjectToCompromise" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities subject to compromise</link:label>
    <link:label id="lab_us-gaap_LiabilitiesSubjectToCompromise_b5eefc96-ccc1-470a-aa65-1ff8cb2de630_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesSubjectToCompromise" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities Subject to Compromise</link:label>
    <link:label id="lab_us-gaap_LiabilitiesSubjectToCompromise_label_en-US" xlink:label="lab_us-gaap_LiabilitiesSubjectToCompromise" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities Subject to Compromise</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesSubjectToCompromise" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesSubjectToCompromise"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesSubjectToCompromise" xlink:to="lab_us-gaap_LiabilitiesSubjectToCompromise" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongtermDebtTypeDomain_c5b3e453-1b4f-4112-ba2b-5f5de15d7f7a_terseLabel_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt, Type [Domain]</link:label>
    <link:label id="lab_us-gaap_LongtermDebtTypeDomain_label_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt, Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongtermDebtTypeDomain" xlink:to="lab_us-gaap_LongtermDebtTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TreasuryStockMember_6a1e258d-1c0f-4317-827a-543edae4d591_terseLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Treasury Shares</link:label>
    <link:label id="lab_us-gaap_TreasuryStockMember_label_en-US" xlink:label="lab_us-gaap_TreasuryStockMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Treasury Stock [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TreasuryStockMember" xlink:to="lab_us-gaap_TreasuryStockMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SalesRevenueProductLineMember_81936561-d8af-4382-8bb5-ecda349791f4_terseLabel_en-US" xlink:label="lab_us-gaap_SalesRevenueProductLineMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Sales Attributable to Products</link:label>
    <link:label id="lab_us-gaap_SalesRevenueProductLineMember_label_en-US" xlink:label="lab_us-gaap_SalesRevenueProductLineMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue, Product and Service Benchmark [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueProductLineMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SalesRevenueProductLineMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SalesRevenueProductLineMember" xlink:to="lab_us-gaap_SalesRevenueProductLineMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EquityMember_cc5d078c-f134-407e-9df9-12df1a924a41_terseLabel_en-US" xlink:label="lab_us-gaap_EquityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity</link:label>
    <link:label id="lab_us-gaap_EquityMember_label_en-US" xlink:label="lab_us-gaap_EquityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityMember" xlink:to="lab_us-gaap_EquityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AssetImpairmentCharges_0ba8fdf3-86eb-410b-857d-839a8674d63a_terseLabel_en-US" xlink:label="lab_us-gaap_AssetImpairmentCharges" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-cash impairment charges</link:label>
    <link:label id="lab_us-gaap_AssetImpairmentCharges_label_en-US" xlink:label="lab_us-gaap_AssetImpairmentCharges" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Impairment Charges</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetImpairmentCharges" xlink:to="lab_us-gaap_AssetImpairmentCharges" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_NinePointFivePercentDebentureMember_335f90f5-8415-47a7-be6d-c03d3e64c689_terseLabel_en-US" xlink:label="lab_mnk_NinePointFivePercentDebentureMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">9.50% Debenture</link:label>
    <link:label id="lab_mnk_NinePointFivePercentDebentureMember_label_en-US" xlink:label="lab_mnk_NinePointFivePercentDebentureMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Nine Point Five Percent Debenture [Member]</link:label>
    <link:label id="lab_mnk_NinePointFivePercentDebentureMember_documentation_en-US" xlink:label="lab_mnk_NinePointFivePercentDebentureMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Nine Point Five Percent Debenture [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_NinePointFivePercentDebentureMember" xlink:href="mnk-20220701.xsd#mnk_NinePointFivePercentDebentureMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_NinePointFivePercentDebentureMember" xlink:to="lab_mnk_NinePointFivePercentDebentureMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_A2017And2018ReplacementTermLoanMember_3fa94bd5-bd5c-4ec9-8421-a6a66526c9b1_terseLabel_en-US" xlink:label="lab_mnk_A2017And2018ReplacementTermLoanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2017 and 2018 Replacement Term Loan</link:label>
    <link:label id="lab_mnk_A2017And2018ReplacementTermLoanMember_label_en-US" xlink:label="lab_mnk_A2017And2018ReplacementTermLoanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2017 and 2018 Replacement Term Loan [Member]</link:label>
    <link:label id="lab_mnk_A2017And2018ReplacementTermLoanMember_documentation_en-US" xlink:label="lab_mnk_A2017And2018ReplacementTermLoanMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2017 and 2018 Replacement Term Loan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_A2017And2018ReplacementTermLoanMember" xlink:href="mnk-20220701.xsd#mnk_A2017And2018ReplacementTermLoanMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_A2017And2018ReplacementTermLoanMember" xlink:to="lab_mnk_A2017And2018ReplacementTermLoanMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherAssetsMember_a51ee3ab-c994-40e5-a48f-09a65cdb3973_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other current and non-current assets</link:label>
    <link:label id="lab_us-gaap_OtherAssetsMember_label_en-US" xlink:label="lab_us-gaap_OtherAssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Assets [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssetsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssetsMember" xlink:to="lab_us-gaap_OtherAssetsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherNonoperatingIncomeExpense_54745a76-3b4f-40a7-9653-b82944c66a16_terseLabel_en-US" xlink:label="lab_us-gaap_OtherNonoperatingIncomeExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other income (expense), net</link:label>
    <link:label id="lab_us-gaap_OtherNonoperatingIncomeExpense_label_en-US" xlink:label="lab_us-gaap_OtherNonoperatingIncomeExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Nonoperating Income (Expense)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpense" xlink:to="lab_us-gaap_OtherNonoperatingIncomeExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermDebtFairValue_0ac01d52-1fd4-4b35-99f4-88646f774d79_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total debt, fair value</link:label>
    <link:label id="lab_us-gaap_LongTermDebtFairValue_label_en-US" xlink:label="lab_us-gaap_LongTermDebtFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt, Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtFairValue" xlink:to="lab_us-gaap_LongTermDebtFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GuaranteesTextBlock_64df6557-1bc3-449b-b5be-138549906931_terseLabel_en-US" xlink:label="lab_us-gaap_GuaranteesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Guarantees</link:label>
    <link:label id="lab_us-gaap_GuaranteesTextBlock_label_en-US" xlink:label="lab_us-gaap_GuaranteesTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Guarantees [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteesTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GuaranteesTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GuaranteesTextBlock" xlink:to="lab_us-gaap_GuaranteesTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_3fece6a1-fe12-4cb9-8e8f-4c03b0918e27_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments for (Proceeds from) Other Investing Activities</link:label>
    <link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_ca926652-c4a9-4e0e-8fdc-7c2a224644dd_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_label_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments for (Proceeds from) Other Investing Activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:to="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_RevenueReserveProvision_c8830bf9-8b89-480e-95b8-079c59f50f07_terseLabel_en-US" xlink:label="lab_mnk_RevenueReserveProvision" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue Reserve Provision</link:label>
    <link:label id="lab_mnk_RevenueReserveProvision_label_en-US" xlink:label="lab_mnk_RevenueReserveProvision" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue Reserve Provision</link:label>
    <link:label id="lab_mnk_RevenueReserveProvision_documentation_en-US" xlink:label="lab_mnk_RevenueReserveProvision" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue Reserve Provision</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_RevenueReserveProvision" xlink:href="mnk-20220701.xsd#mnk_RevenueReserveProvision"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_RevenueReserveProvision" xlink:to="lab_mnk_RevenueReserveProvision" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_36ef4b2b-3bef-41dc-9d9c-fc03597018a8_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments to Acquire Property, Plant, and Equipment</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_0b81474e-7c49-44a9-9027-4f623df45817_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital expenditures</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments to Acquire Property, Plant, and Equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherLiabilitiesCurrent_69de744a-f046-44b2-bfb6-1b8566e843bd_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued and other current liabilities</link:label>
    <link:label id="lab_us-gaap_OtherLiabilitiesCurrent_label_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Liabilities, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent" xlink:to="lab_us-gaap_OtherLiabilitiesCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ReceivableFinancingFacilityMember_b19cc3cc-47e2-494b-9e19-0f6eee167570_terseLabel_en-US" xlink:label="lab_mnk_ReceivableFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Receivable Financing Facility</link:label>
    <link:label id="lab_mnk_ReceivableFinancingFacilityMember_label_en-US" xlink:label="lab_mnk_ReceivableFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Receivable Financing Facility [Member]</link:label>
    <link:label id="lab_mnk_ReceivableFinancingFacilityMember_documentation_en-US" xlink:label="lab_mnk_ReceivableFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Receivable Financing Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ReceivableFinancingFacilityMember" xlink:href="mnk-20220701.xsd#mnk_ReceivableFinancingFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_ReceivableFinancingFacilityMember" xlink:to="lab_mnk_ReceivableFinancingFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_OpioidRelatedSettlementGrossAmountOfDeferredPayment_64057ae2-43d0-4f10-a22e-2452a9628184_terseLabel_en-US" xlink:label="lab_mnk_OpioidRelatedSettlementGrossAmountOfDeferredPayment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid-Related Settlement, Gross Amount of Deferred Payment</link:label>
    <link:label id="lab_mnk_OpioidRelatedSettlementGrossAmountOfDeferredPayment_label_en-US" xlink:label="lab_mnk_OpioidRelatedSettlementGrossAmountOfDeferredPayment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid-Related Settlement, Gross Amount of Deferred Payment</link:label>
    <link:label id="lab_mnk_OpioidRelatedSettlementGrossAmountOfDeferredPayment_documentation_en-US" xlink:label="lab_mnk_OpioidRelatedSettlementGrossAmountOfDeferredPayment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid-Related Settlement, Gross Amount of Deferred Payment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_OpioidRelatedSettlementGrossAmountOfDeferredPayment" xlink:href="mnk-20220701.xsd#mnk_OpioidRelatedSettlementGrossAmountOfDeferredPayment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_OpioidRelatedSettlementGrossAmountOfDeferredPayment" xlink:to="lab_mnk_OpioidRelatedSettlementGrossAmountOfDeferredPayment" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ContingentConsiderationByTypeAxis_5db91727-4d3a-4361-ad75-10917d35b68d_terseLabel_en-US" xlink:label="lab_us-gaap_ContingentConsiderationByTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contingent Consideration by Type [Axis]</link:label>
    <link:label id="lab_us-gaap_ContingentConsiderationByTypeAxis_label_en-US" xlink:label="lab_us-gaap_ContingentConsiderationByTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contingent Consideration by Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContingentConsiderationByTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContingentConsiderationByTypeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContingentConsiderationByTypeAxis" xlink:to="lab_us-gaap_ContingentConsiderationByTypeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermDebtCurrentAbstract_f7fbb5ac-2255-4da4-b5c6-a6e00a5b0a65_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtCurrentAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current maturities of long-term debt</link:label>
    <link:label id="lab_us-gaap_LongTermDebtCurrentAbstract_label_en-US" xlink:label="lab_us-gaap_LongTermDebtCurrentAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt, Current Maturities [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtCurrentAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtCurrentAbstract" xlink:to="lab_us-gaap_LongTermDebtCurrentAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_MaximumMember_40538e99-f575-436b-9862-07e6070a4776_terseLabel_en-US" xlink:label="lab_srt_MaximumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maximum</link:label>
    <link:label id="lab_srt_MaximumMember_label_en-US" xlink:label="lab_srt_MaximumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maximum [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MaximumMember" xlink:to="lab_srt_MaximumMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LossContingencyNatureDomain_81879037-96cd-437c-a7c4-897d4a3860be_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingencyNatureDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loss Contingency, Nature [Domain]</link:label>
    <link:label id="lab_us-gaap_LossContingencyNatureDomain_label_en-US" xlink:label="lab_us-gaap_LossContingencyNatureDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loss Contingency, Nature [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingencyNatureDomain" xlink:to="lab_us-gaap_LossContingencyNatureDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GuaranteeObligationsByNatureAxis_abfe4d91-9ea3-4865-9581-9e89e52689fa_terseLabel_en-US" xlink:label="lab_us-gaap_GuaranteeObligationsByNatureAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Guarantor Obligations, Nature [Axis]</link:label>
    <link:label id="lab_us-gaap_GuaranteeObligationsByNatureAxis_label_en-US" xlink:label="lab_us-gaap_GuaranteeObligationsByNatureAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Guarantor Obligations, Nature [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsByNatureAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GuaranteeObligationsByNatureAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis" xlink:to="lab_us-gaap_GuaranteeObligationsByNatureAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_Liabilities_56408948-d8be-4888-a7f5-5f5fd4a31652_totalLabel_en-US" xlink:label="lab_us-gaap_Liabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other liabilities</link:label>
    <link:label id="lab_us-gaap_Liabilities_81b0c4ab-0873-42cf-bdf7-585fd87ab7cf_terseLabel_en-US" xlink:label="lab_us-gaap_Liabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities</link:label>
    <link:label id="lab_us-gaap_Liabilities_label_en-US" xlink:label="lab_us-gaap_Liabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Liabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Liabilities" xlink:to="lab_us-gaap_Liabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_TypeofObligationDomain_6d20b4af-90bf-4181-967e-c24b31652642_terseLabel_en-US" xlink:label="lab_mnk_TypeofObligationDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Type of Obligation [Domain]</link:label>
    <link:label id="lab_mnk_TypeofObligationDomain_label_en-US" xlink:label="lab_mnk_TypeofObligationDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Type of Obligation [Domain]</link:label>
    <link:label id="lab_mnk_TypeofObligationDomain_documentation_en-US" xlink:label="lab_mnk_TypeofObligationDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Domain] for Type of Obligation [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_TypeofObligationDomain" xlink:href="mnk-20220701.xsd#mnk_TypeofObligationDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_TypeofObligationDomain" xlink:to="lab_mnk_TypeofObligationDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ReorganizationAdjustmentsLiabilitiesSubjectToCompromiseTableTextBlock_36c0c62d-a85f-4beb-aea6-1d8c795ffc0d_terseLabel_en-US" xlink:label="lab_mnk_ReorganizationAdjustmentsLiabilitiesSubjectToCompromiseTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Adjustments, Liabilities Subject to Compromise</link:label>
    <link:label id="lab_mnk_ReorganizationAdjustmentsLiabilitiesSubjectToCompromiseTableTextBlock_label_en-US" xlink:label="lab_mnk_ReorganizationAdjustmentsLiabilitiesSubjectToCompromiseTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Adjustments, Liabilities Subject to Compromise [Table Text Block]</link:label>
    <link:label id="lab_mnk_ReorganizationAdjustmentsLiabilitiesSubjectToCompromiseTableTextBlock_documentation_en-US" xlink:label="lab_mnk_ReorganizationAdjustmentsLiabilitiesSubjectToCompromiseTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Adjustments, Liabilities Subject to Compromise</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ReorganizationAdjustmentsLiabilitiesSubjectToCompromiseTableTextBlock" xlink:href="mnk-20220701.xsd#mnk_ReorganizationAdjustmentsLiabilitiesSubjectToCompromiseTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_ReorganizationAdjustmentsLiabilitiesSubjectToCompromiseTableTextBlock" xlink:to="lab_mnk_ReorganizationAdjustmentsLiabilitiesSubjectToCompromiseTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts_dd129659-6ad7-488f-be9e-385a9c9dc3aa_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment for Debt Extinguishment or Debt Prepayment Cost</link:label>
    <link:label id="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment for Debt Extinguishment or Debt Prepayment Cost</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtExtinguishmentCosts" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsOfDebtExtinguishmentCosts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDebtExtinguishmentCosts" xlink:to="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_TenPointZeroPercentSecondLienNotesExistingNotesMember_91061137-397c-489e-92f0-766278867dcf_terseLabel_en-US" xlink:label="lab_mnk_TenPointZeroPercentSecondLienNotesExistingNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ten Point Zero Percent Second Lien Notes (Existing Notes)</link:label>
    <link:label id="lab_mnk_TenPointZeroPercentSecondLienNotesExistingNotesMember_label_en-US" xlink:label="lab_mnk_TenPointZeroPercentSecondLienNotesExistingNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ten Point Zero Percent Second Lien Notes (Existing Notes) [Member]</link:label>
    <link:label id="lab_mnk_TenPointZeroPercentSecondLienNotesExistingNotesMember_documentation_en-US" xlink:label="lab_mnk_TenPointZeroPercentSecondLienNotesExistingNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ten Point Zero Percent Second Lien Notes (Existing Notes)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_TenPointZeroPercentSecondLienNotesExistingNotesMember" xlink:href="mnk-20220701.xsd#mnk_TenPointZeroPercentSecondLienNotesExistingNotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_TenPointZeroPercentSecondLienNotesExistingNotesMember" xlink:to="lab_mnk_TenPointZeroPercentSecondLienNotesExistingNotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfGuaranteeObligationsTable_95ebaf1f-6046-478e-b461-39f214093a75_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfGuaranteeObligationsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Guarantor Obligations [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfGuaranteeObligationsTable_label_en-US" xlink:label="lab_us-gaap_ScheduleOfGuaranteeObligationsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Guarantor Obligations [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGuaranteeObligationsTable" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfGuaranteeObligationsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfGuaranteeObligationsTable" xlink:to="lab_us-gaap_ScheduleOfGuaranteeObligationsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ActharGelRelatedSettlementGrossAmountOfDeferredPayments_876e6647-b66e-4e28-9216-10ad3907e5b8_terseLabel_en-US" xlink:label="lab_mnk_ActharGelRelatedSettlementGrossAmountOfDeferredPayments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel-Related Settlement, Gross Amount of Deferred Payments</link:label>
    <link:label id="lab_mnk_ActharGelRelatedSettlementGrossAmountOfDeferredPayments_label_en-US" xlink:label="lab_mnk_ActharGelRelatedSettlementGrossAmountOfDeferredPayments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel-Related Settlement, Gross Amount of Deferred Payments</link:label>
    <link:label id="lab_mnk_ActharGelRelatedSettlementGrossAmountOfDeferredPayments_documentation_en-US" xlink:label="lab_mnk_ActharGelRelatedSettlementGrossAmountOfDeferredPayments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel-Related Settlement, Gross Amount of Deferred Payments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ActharGelRelatedSettlementGrossAmountOfDeferredPayments" xlink:href="mnk-20220701.xsd#mnk_ActharGelRelatedSettlementGrossAmountOfDeferredPayments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_ActharGelRelatedSettlementGrossAmountOfDeferredPayments" xlink:to="lab_mnk_ActharGelRelatedSettlementGrossAmountOfDeferredPayments" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_883bfed4-086a-4c21-bf7d-747d13d9e6f6_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Remainder of Fiscal 2022</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finite-Lived Intangible Asset, Expected Amortization, Year One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_d1a28ed6-e9ee-48f6-bd8b-1e0facc5566b_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash Flows From Financing Activities:</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_AdjustmentAdjustmentCurrentLiabilitiesTableTextBlock_d753b499-4792-4508-96fe-8733a6206dfd_terseLabel_en-US" xlink:label="lab_mnk_AdjustmentAdjustmentCurrentLiabilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustment Adjustment, Current Liabilities</link:label>
    <link:label id="lab_mnk_AdjustmentAdjustmentCurrentLiabilitiesTableTextBlock_label_en-US" xlink:label="lab_mnk_AdjustmentAdjustmentCurrentLiabilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustment Adjustment, Current Liabilities [Table Text Block]</link:label>
    <link:label id="lab_mnk_AdjustmentAdjustmentCurrentLiabilitiesTableTextBlock_documentation_en-US" xlink:label="lab_mnk_AdjustmentAdjustmentCurrentLiabilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustment Adjustment, Current Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_AdjustmentAdjustmentCurrentLiabilitiesTableTextBlock" xlink:href="mnk-20220701.xsd#mnk_AdjustmentAdjustmentCurrentLiabilitiesTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_AdjustmentAdjustmentCurrentLiabilitiesTableTextBlock" xlink:to="lab_mnk_AdjustmentAdjustmentCurrentLiabilitiesTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_AmitizaMember_11ce83ef-577d-49ed-8957-f6e956668b82_terseLabel_en-US" xlink:label="lab_mnk_AmitizaMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amitiza [Member]</link:label>
    <link:label id="lab_mnk_AmitizaMember_label_en-US" xlink:label="lab_mnk_AmitizaMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amitiza [Member]</link:label>
    <link:label id="lab_mnk_AmitizaMember_documentation_en-US" xlink:label="lab_mnk_AmitizaMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amitiza [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_AmitizaMember" xlink:href="mnk-20220701.xsd#mnk_AmitizaMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_AmitizaMember" xlink:to="lab_mnk_AmitizaMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ConsolidationItemsAxis_3dc94f48-d38f-436b-815e-688622716a90_terseLabel_en-US" xlink:label="lab_srt_ConsolidationItemsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consolidation Items [Axis]</link:label>
    <link:label id="lab_srt_ConsolidationItemsAxis_label_en-US" xlink:label="lab_srt_ConsolidationItemsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consolidation Items [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidationItemsAxis" xlink:to="lab_srt_ConsolidationItemsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockholdersEquity_73713d6d-1517-47cc-bc4c-62591a3ef50e_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total Shareholders' Equity</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_b93f5244-5ec8-4fc8-a1c8-c84737fcaaf4_periodStartLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_eb54880d-bc6f-49a2-a88a-929dc14a6de5_periodEndLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ending balance</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_b4b0cae0-b132-4ea4-a89e-55c1cc550ec4_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stockholders' Equity Attributable to Parent</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_label_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stockholders' Equity Attributable to Parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquity" xlink:to="lab_us-gaap_StockholdersEquity" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockSharesIssued_549179eb-135a-4257-aca8-e9eaeb9465f5_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesIssued" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ordinary shares, shares issued (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesIssued_a491fabf-e168-4736-b022-387365c00096_periodStartLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesIssued" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Beginning balance, ordinary shares (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesIssued_186d93c9-a6b5-4a0a-8aac-21ec5a9c1444_periodEndLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesIssued" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ending balance, ordinary shares (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesIssued_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesIssued" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common Stock, Shares, Issued</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesIssued" xlink:to="lab_us-gaap_CommonStockSharesIssued" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PreferredStockSharesIssued_41cfe92e-3e81-4499-8d5a-e679343752ca_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockSharesIssued" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred shares, shares issued (in shares)</link:label>
    <link:label id="lab_us-gaap_PreferredStockSharesIssued_label_en-US" xlink:label="lab_us-gaap_PreferredStockSharesIssued" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred Stock, Shares Issued</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesIssued" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockSharesIssued"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockSharesIssued" xlink:to="lab_us-gaap_PreferredStockSharesIssued" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CityAreaCode_9729225a-4db2-417d-9c24-5115543a33f6_terseLabel_en-US" xlink:label="lab_dei_CityAreaCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">City Area Code</link:label>
    <link:label id="lab_dei_CityAreaCode_label_en-US" xlink:label="lab_dei_CityAreaCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">City Area Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_CityAreaCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CityAreaCode" xlink:to="lab_dei_CityAreaCode" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_PropertyPlantandEquipmentDepreciationAbstract_49b79e29-b45e-4522-b44f-eed15e550397_terseLabel_en-US" xlink:label="lab_mnk_PropertyPlantandEquipmentDepreciationAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment - Depreciation [Abstract]</link:label>
    <link:label id="lab_mnk_PropertyPlantandEquipmentDepreciationAbstract_label_en-US" xlink:label="lab_mnk_PropertyPlantandEquipmentDepreciationAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment - Depreciation [Abstract]</link:label>
    <link:label id="lab_mnk_PropertyPlantandEquipmentDepreciationAbstract_documentation_en-US" xlink:label="lab_mnk_PropertyPlantandEquipmentDepreciationAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment - Depreciation [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_PropertyPlantandEquipmentDepreciationAbstract" xlink:href="mnk-20220701.xsd#mnk_PropertyPlantandEquipmentDepreciationAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_PropertyPlantandEquipmentDepreciationAbstract" xlink:to="lab_mnk_PropertyPlantandEquipmentDepreciationAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_AdjustmentToRetainedDeficitSeveranceAccrual_b5f20613-c413-4b48-bd80-90c0eb97e878_terseLabel_en-US" xlink:label="lab_mnk_AdjustmentToRetainedDeficitSeveranceAccrual" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustment to Retained Deficit, Severance Accrual</link:label>
    <link:label id="lab_mnk_AdjustmentToRetainedDeficitSeveranceAccrual_label_en-US" xlink:label="lab_mnk_AdjustmentToRetainedDeficitSeveranceAccrual" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustment to Retained Deficit, Severance Accrual</link:label>
    <link:label id="lab_mnk_AdjustmentToRetainedDeficitSeveranceAccrual_documentation_en-US" xlink:label="lab_mnk_AdjustmentToRetainedDeficitSeveranceAccrual" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustment to Retained Deficit, Severance Accrual</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_AdjustmentToRetainedDeficitSeveranceAccrual" xlink:href="mnk-20220701.xsd#mnk_AdjustmentToRetainedDeficitSeveranceAccrual"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_AdjustmentToRetainedDeficitSeveranceAccrual" xlink:to="lab_mnk_AdjustmentToRetainedDeficitSeveranceAccrual" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_OpioidRelatedSettlementYearThreeThroughSeven_a67056d3-0c75-46b8-b07b-38e5937fe5bd_terseLabel_en-US" xlink:label="lab_mnk_OpioidRelatedSettlementYearThreeThroughSeven" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring Support Agreement Proposed Settlement, Year Three through Seven</link:label>
    <link:label id="lab_mnk_OpioidRelatedSettlementYearThreeThroughSeven_label_en-US" xlink:label="lab_mnk_OpioidRelatedSettlementYearThreeThroughSeven" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid-Related Settlement, Year Three through Seven</link:label>
    <link:label id="lab_mnk_OpioidRelatedSettlementYearThreeThroughSeven_documentation_en-US" xlink:label="lab_mnk_OpioidRelatedSettlementYearThreeThroughSeven" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid-Related Settlement, Year Three through Seven</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_OpioidRelatedSettlementYearThreeThroughSeven" xlink:href="mnk-20220701.xsd#mnk_OpioidRelatedSettlementYearThreeThroughSeven"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_OpioidRelatedSettlementYearThreeThroughSeven" xlink:to="lab_mnk_OpioidRelatedSettlementYearThreeThroughSeven" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_ae417d69-ae5b-47f2-bd5f-27542320fc5a_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill and Intangible Assets Disclosure [Abstract]</link:label>
    <link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_label_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill and Intangible Assets Disclosure [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:to="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ActharGelRelatedSettlementGrossAmount_3cf80a0a-7349-4b0e-a25f-79a0fccb5f46_terseLabel_en-US" xlink:label="lab_mnk_ActharGelRelatedSettlementGrossAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel-Related Settlement, Gross Amount</link:label>
    <link:label id="lab_mnk_ActharGelRelatedSettlementGrossAmount_label_en-US" xlink:label="lab_mnk_ActharGelRelatedSettlementGrossAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel-Related Settlement, Gross Amount</link:label>
    <link:label id="lab_mnk_ActharGelRelatedSettlementGrossAmount_documentation_en-US" xlink:label="lab_mnk_ActharGelRelatedSettlementGrossAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel-Related Settlement, Gross Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ActharGelRelatedSettlementGrossAmount" xlink:href="mnk-20220701.xsd#mnk_ActharGelRelatedSettlementGrossAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_ActharGelRelatedSettlementGrossAmount" xlink:to="lab_mnk_ActharGelRelatedSettlementGrossAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_DebtFairValueMember_1edd1a14-044e-4db1-8918-d8bf8466403d_terseLabel_en-US" xlink:label="lab_mnk_DebtFairValueMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt, fair value</link:label>
    <link:label id="lab_mnk_DebtFairValueMember_label_en-US" xlink:label="lab_mnk_DebtFairValueMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt, fair value [Member]</link:label>
    <link:label id="lab_mnk_DebtFairValueMember_documentation_en-US" xlink:label="lab_mnk_DebtFairValueMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt, fair value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_DebtFairValueMember" xlink:href="mnk-20220701.xsd#mnk_DebtFairValueMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_DebtFairValueMember" xlink:to="lab_mnk_DebtFairValueMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressCityOrTown_53cde4af-9208-4d86-9089-f9c835cd21f0_terseLabel_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:label id="lab_dei_EntityAddressCityOrTown_label_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressCityOrTown"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressCityOrTown" xlink:to="lab_dei_EntityAddressCityOrTown" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_AlternateBaseRateMember_d70dbf75-e69c-455d-97d9-a5b42af35cb7_terseLabel_en-US" xlink:label="lab_mnk_AlternateBaseRateMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Alternate Base Rate</link:label>
    <link:label id="lab_mnk_AlternateBaseRateMember_label_en-US" xlink:label="lab_mnk_AlternateBaseRateMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Alternate Base Rate [Member]</link:label>
    <link:label id="lab_mnk_AlternateBaseRateMember_documentation_en-US" xlink:label="lab_mnk_AlternateBaseRateMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Alternate Base Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_AlternateBaseRateMember" xlink:href="mnk-20220701.xsd#mnk_AlternateBaseRateMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_AlternateBaseRateMember" xlink:to="lab_mnk_AlternateBaseRateMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_mnk_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionAxis_label_en-US" xlink:label="lab_mnk_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Axis]</link:label>
    <link:label id="lab_mnk_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionAxis_documentation_en-US" xlink:label="lab_mnk_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionAxis" xlink:href="mnk-20220701.xsd#mnk_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionAxis"/>
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    <link:label id="lab_us-gaap_ProceedsFromSaleOfIntangibleAssets_943de2bf-aa4d-4be6-9b20-db3506cc85f9_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfIntangibleAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from Sale of Intangible Assets</link:label>
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    <link:label id="lab_mnk_AmerisourceBergenCorporationMember_7fd63d9d-1c55-40be-9a86-e25e303f3784_terseLabel_en-US" xlink:label="lab_mnk_AmerisourceBergenCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amerisource Bergen Corporation [Member]</link:label>
    <link:label id="lab_mnk_AmerisourceBergenCorporationMember_label_en-US" xlink:label="lab_mnk_AmerisourceBergenCorporationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amerisource Bergen Corporation [Member]</link:label>
    <link:label id="lab_mnk_AmerisourceBergenCorporationMember_documentation_en-US" xlink:label="lab_mnk_AmerisourceBergenCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amerisource Bergen Corporation [Member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_AmerisourceBergenCorporationMember" xlink:to="lab_mnk_AmerisourceBergenCorporationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IntangibleAssetsDisclosureTextBlock_813d24f1-76ec-41ad-ad7d-e2a7c12ba219_terseLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible Asset Amortization Expense</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IntangibleAssetsDisclosureTextBlock"/>
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    <link:label id="lab_mnk_OtherSalesDeductionsMember_673d3c81-6f5f-4e7a-933f-0b23ee7fbc90_terseLabel_en-US" xlink:label="lab_mnk_OtherSalesDeductionsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Sales Deductions [Member]</link:label>
    <link:label id="lab_mnk_OtherSalesDeductionsMember_label_en-US" xlink:label="lab_mnk_OtherSalesDeductionsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Sales Deductions [Member]</link:label>
    <link:label id="lab_mnk_OtherSalesDeductionsMember_documentation_en-US" xlink:label="lab_mnk_OtherSalesDeductionsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Sales Deductions [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_OtherSalesDeductionsMember" xlink:href="mnk-20220701.xsd#mnk_OtherSalesDeductionsMember"/>
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    <link:label id="lab_mnk_RevenueFromCustomerCumulativeThreshold_f456b282-fb64-4b19-9a6d-e1d7eefae5e0_terseLabel_en-US" xlink:label="lab_mnk_RevenueFromCustomerCumulativeThreshold" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue from Customer, Cumulative Threshold</link:label>
    <link:label id="lab_mnk_RevenueFromCustomerCumulativeThreshold_label_en-US" xlink:label="lab_mnk_RevenueFromCustomerCumulativeThreshold" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue from Customer, Cumulative Threshold</link:label>
    <link:label id="lab_mnk_RevenueFromCustomerCumulativeThreshold_documentation_en-US" xlink:label="lab_mnk_RevenueFromCustomerCumulativeThreshold" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue from Customer, Cumulative Threshold</link:label>
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    <link:label id="lab_us-gaap_StockholdersEquityAbstract_13b1e606-f8ca-48c2-8dc2-1c126e8aa00b_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shareholders' Equity:</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityAbstract_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stockholders' Equity Attributable to Parent [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityAbstract" xlink:to="lab_us-gaap_StockholdersEquityAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_OriginalIssuanceDiscountMember_d68ea15a-4abd-4162-885e-aceac6eab712_terseLabel_en-US" xlink:label="lab_mnk_OriginalIssuanceDiscountMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Original Issuance Discount</link:label>
    <link:label id="lab_mnk_OriginalIssuanceDiscountMember_label_en-US" xlink:label="lab_mnk_OriginalIssuanceDiscountMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Original Issuance Discount [Member]</link:label>
    <link:label id="lab_mnk_OriginalIssuanceDiscountMember_documentation_en-US" xlink:label="lab_mnk_OriginalIssuanceDiscountMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Original Issuance Discount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_OriginalIssuanceDiscountMember" xlink:href="mnk-20220701.xsd#mnk_OriginalIssuanceDiscountMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_OriginalIssuanceDiscountMember" xlink:to="lab_mnk_OriginalIssuanceDiscountMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_AdjustmentToRetainedDeficitIncomeTaxExpenseOnPlanAdjustments_ff7950ea-3a15-4888-b3f7-398b61ac2234_terseLabel_en-US" xlink:label="lab_mnk_AdjustmentToRetainedDeficitIncomeTaxExpenseOnPlanAdjustments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustment to Retained Deficit, Income Tax Expense on Plan Adjustments</link:label>
    <link:label id="lab_mnk_AdjustmentToRetainedDeficitIncomeTaxExpenseOnPlanAdjustments_label_en-US" xlink:label="lab_mnk_AdjustmentToRetainedDeficitIncomeTaxExpenseOnPlanAdjustments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustment to Retained Deficit, Income Tax Expense on Plan Adjustments</link:label>
    <link:label id="lab_mnk_AdjustmentToRetainedDeficitIncomeTaxExpenseOnPlanAdjustments_documentation_en-US" xlink:label="lab_mnk_AdjustmentToRetainedDeficitIncomeTaxExpenseOnPlanAdjustments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustment to Retained Deficit, Income Tax Expense on Plan Adjustments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_AdjustmentToRetainedDeficitIncomeTaxExpenseOnPlanAdjustments" xlink:href="mnk-20220701.xsd#mnk_AdjustmentToRetainedDeficitIncomeTaxExpenseOnPlanAdjustments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_AdjustmentToRetainedDeficitIncomeTaxExpenseOnPlanAdjustments" xlink:to="lab_mnk_AdjustmentToRetainedDeficitIncomeTaxExpenseOnPlanAdjustments" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_BalanceSheetLocationAxis_7a868994-aa56-46a2-84c1-f312493f592a_terseLabel_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance Sheet Location [Axis]</link:label>
    <link:label id="lab_us-gaap_BalanceSheetLocationAxis_label_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance Sheet Location [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BalanceSheetLocationAxis" xlink:to="lab_us-gaap_BalanceSheetLocationAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_RestructuringFiscal2018PlanMember_4837f7e6-28cb-4d57-b342-ae1db00ad6f1_terseLabel_en-US" xlink:label="lab_mnk_RestructuringFiscal2018PlanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring Fiscal 2018 Plan</link:label>
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    <link:label id="lab_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_2cb0e8b1-59e4-420d-9569-e6527df88bc5_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments for New Accounting Pronouncements [Axis]</link:label>
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    <link:label id="lab_us-gaap_UnsecuredDebt_651c1c45-cd99-431d-9649-542f04a1a552_terseLabel_en-US" xlink:label="lab_us-gaap_UnsecuredDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unsecured Debt</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnsecuredDebt" xlink:to="lab_us-gaap_UnsecuredDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CurrentIncomeTaxExpenseBenefit_a513f308-e355-4577-8948-933cda13e2c9_terseLabel_en-US" xlink:label="lab_us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Income Tax Expense (Benefit)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:to="lab_us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_9fe17d1d-e10f-4ad5-b8f9-84d5464ab44b_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Instrument, Face Amount</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Instrument, Face Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
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    <link:label id="lab_us-gaap_IncomeStatementAbstract_71688b45-e81f-4773-844e-b6cd23a90838_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Statement [Abstract]</link:label>
    <link:label id="lab_us-gaap_IncomeStatementAbstract_label_en-US" xlink:label="lab_us-gaap_IncomeStatementAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Statement [Abstract]</link:label>
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    <link:label id="lab_us-gaap_ConcentrationRiskTable_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk [Table]</link:label>
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    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_2debbed2-814b-4392-bf37-61fb0b7e2f6e_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income tax benefit</link:label>
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    <link:label id="lab_mnk_TermLoandue2025Member_cdf9147e-b8ef-4a5a-a1fe-556b44af1b8c_terseLabel_en-US" xlink:label="lab_mnk_TermLoandue2025Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term Loan due 2025</link:label>
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    <link:label id="lab_us-gaap_AccountsReceivableNetCurrent_42ff6d46-1724-4926-a975-ea5fc68f8546_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts receivable, less allowance for doubtful accounts of $5.8 and $4.7</link:label>
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    <link:label id="lab_us-gaap_UnsecuredDebtMember_72b39309-04e5-4114-83c4-2ae4f117ae1c_terseLabel_en-US" xlink:label="lab_us-gaap_UnsecuredDebtMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unsecured Debt</link:label>
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    <link:label id="lab_us-gaap_StatementEquityComponentsAxis_label_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity Components [Axis]</link:label>
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    <link:label id="lab_dei_EntityTaxIdentificationNumber_52ae4123-2438-4992-b914-a2be87ae4404_terseLabel_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Tax Identification Number</link:label>
    <link:label id="lab_dei_EntityTaxIdentificationNumber_label_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Tax Identification Number</link:label>
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    <link:label id="lab_mnk_FreshStartAdjustmentsDebtFairValue_d1ed7515-e875-4e73-a4f9-8f4c91176ff4_terseLabel_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsDebtFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, Debt, Fair Value</link:label>
    <link:label id="lab_mnk_FreshStartAdjustmentsDebtFairValue_label_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsDebtFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, Debt, Fair Value</link:label>
    <link:label id="lab_mnk_FreshStartAdjustmentsDebtFairValue_documentation_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsDebtFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, Debt, Fair Value</link:label>
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    <link:label id="lab_us-gaap_FairValueDisclosuresAbstract_24a0220f-cb09-4cc8-b5f9-e78c53fb95a4_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Disclosures [Abstract]</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosuresAbstract_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Disclosures [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueDisclosuresAbstract"/>
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    <link:label id="lab_dei_DocumentFiscalPeriodFocus_119069a7-d5ff-4ef7-8fd4-0a34c4167326_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Fiscal Period Focus</link:label>
    <link:label id="lab_dei_DocumentFiscalPeriodFocus_label_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Fiscal Period Focus</link:label>
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    <link:label id="lab_mnk_TenPointZeroPercentSecondLienNotesDue2029Member_eb36f370-f424-413e-9527-73817484e731_terseLabel_en-US" xlink:label="lab_mnk_TenPointZeroPercentSecondLienNotesDue2029Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ten Point Zero Percent Second Lien Notes due 2029</link:label>
    <link:label id="lab_mnk_TenPointZeroPercentSecondLienNotesDue2029Member_label_en-US" xlink:label="lab_mnk_TenPointZeroPercentSecondLienNotesDue2029Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ten Point Zero Percent Second Lien Notes due 2029 [Member]</link:label>
    <link:label id="lab_mnk_TenPointZeroPercentSecondLienNotesDue2029Member_documentation_en-US" xlink:label="lab_mnk_TenPointZeroPercentSecondLienNotesDue2029Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ten Point Zero Percent Second Lien Notes due 2029</link:label>
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    <link:label id="lab_us-gaap_AssetsCurrent_30f6d5cf-5106-4031-8b65-348ac7723568_totalLabel_en-US" xlink:label="lab_us-gaap_AssetsCurrent" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total current assets</link:label>
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    <link:label id="lab_us-gaap_AssetsCurrent_label_en-US" xlink:label="lab_us-gaap_AssetsCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsCurrent" xlink:to="lab_us-gaap_AssetsCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_LossonDivestiture_7a8af200-ce18-4fc4-afdc-004652c309ad_terseLabel_en-US" xlink:label="lab_mnk_LossonDivestiture" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Losses on divestiture</link:label>
    <link:label id="lab_mnk_LossonDivestiture_label_en-US" xlink:label="lab_mnk_LossonDivestiture" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loss on Divestiture</link:label>
    <link:label id="lab_mnk_LossonDivestiture_documentation_en-US" xlink:label="lab_mnk_LossonDivestiture" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loss on Divestiture</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_LossonDivestiture" xlink:href="mnk-20220701.xsd#mnk_LossonDivestiture"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_LossonDivestiture" xlink:to="lab_mnk_LossonDivestiture" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccountsReceivableMember_d92aa684-0212-4f85-85ce-9edc05b7e872_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts Receivable Attributable to Distributors</link:label>
    <link:label id="lab_us-gaap_AccountsReceivableMember_label_en-US" xlink:label="lab_us-gaap_AccountsReceivableMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts Receivable [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsReceivableMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsReceivableMember" xlink:to="lab_us-gaap_AccountsReceivableMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ConcentrationRiskTypeDomain_aa4ae85a-797a-43e5-b247-054bb66c08d6_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk Type [Domain]</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskTypeDomain_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain" xlink:to="lab_us-gaap_ConcentrationRiskTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DisaggregationOfRevenueTable_599c8717-7cdc-4771-9d0c-76cf2cba0096_terseLabel_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disaggregation of Revenue [Table]</link:label>
    <link:label id="lab_us-gaap_DisaggregationOfRevenueTable_label_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disaggregation of Revenue [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
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    <link:label id="lab_mnk_LiabilitiesHeldForSalesNotPartOfDisposalGroupCurrent_18117d95-a5cf-476e-bff2-4d48d5e28586_terseLabel_en-US" xlink:label="lab_mnk_LiabilitiesHeldForSalesNotPartOfDisposalGroupCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities Held-for-Sales, Not Part of Disposal Group, Current</link:label>
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    <link:label id="lab_mnk_LiabilitiesHeldForSalesNotPartOfDisposalGroupCurrent_documentation_en-US" xlink:label="lab_mnk_LiabilitiesHeldForSalesNotPartOfDisposalGroupCurrent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities Held-for-Sales, Not Part of Disposal Group, Current</link:label>
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    <link:label id="lab_us-gaap_InventoryNet_29414c7a-460f-41d2-8db5-4083b19ff1d8_terseLabel_en-US" xlink:label="lab_us-gaap_InventoryNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inventories</link:label>
    <link:label id="lab_us-gaap_InventoryNet_totalLabel_en-US" xlink:label="lab_us-gaap_InventoryNet" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inventory, Net, Total</link:label>
    <link:label id="lab_us-gaap_InventoryNet_label_en-US" xlink:label="lab_us-gaap_InventoryNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inventory, Net</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InventoryNet" xlink:to="lab_us-gaap_InventoryNet" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ReorganizationNarrativeDetailTable_ceade26c-43a6-44a5-8a98-dbfd4c5c164f_terseLabel_en-US" xlink:label="lab_mnk_ReorganizationNarrativeDetailTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Narrative Detail [Table]</link:label>
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    <link:label id="lab_mnk_ReorganizationNarrativeDetailTable_documentation_en-US" xlink:label="lab_mnk_ReorganizationNarrativeDetailTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Narrative Detail</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_f53cb708-7496-4b77-94a5-cca693c736b4_verboseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Segment Reporting Information by Reportable Segment</link:label>
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    <link:label id="lab_mnk_GuaranteedUnsecuredNotesMember_cbea65a1-4f99-45ca-8fef-2c0be2e647fd_terseLabel_en-US" xlink:label="lab_mnk_GuaranteedUnsecuredNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Guaranteed Unsecured Notes</link:label>
    <link:label id="lab_mnk_GuaranteedUnsecuredNotesMember_label_en-US" xlink:label="lab_mnk_GuaranteedUnsecuredNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Guaranteed Unsecured Notes [Member]</link:label>
    <link:label id="lab_mnk_GuaranteedUnsecuredNotesMember_documentation_en-US" xlink:label="lab_mnk_GuaranteedUnsecuredNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Guaranteed Unsecured Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_GuaranteedUnsecuredNotesMember" xlink:href="mnk-20220701.xsd#mnk_GuaranteedUnsecuredNotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_GuaranteedUnsecuredNotesMember" xlink:to="lab_mnk_GuaranteedUnsecuredNotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TransferredOverTimeMember_a5893846-39a0-49e9-b5a5-9a13dc63fc1b_terseLabel_en-US" xlink:label="lab_us-gaap_TransferredOverTimeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transferred over Time [Member]</link:label>
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    <link:label id="lab_us-gaap_FairValueInputsLevel2Member_a7ed8046-dfad-4a80-983d-ede4ee476caa_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel2Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Level 2</link:label>
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    <link:label id="lab_us-gaap_TypeOfAdoptionMember_2c70f2dd-f6a3-47a9-8606-e419a9afce57_terseLabel_en-US" xlink:label="lab_us-gaap_TypeOfAdoptionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Type of Adoption [Domain]</link:label>
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    <link:label id="lab_mnk_RestructuringFiscal2021PlanMember_0d0533cf-2581-4362-b9d1-dca12f8da841_terseLabel_en-US" xlink:label="lab_mnk_RestructuringFiscal2021PlanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring Fiscal 2021 Plan</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_d944799c-dbfb-40e5-a5ad-1efc18c6af9b_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Instrument, Interest Rate, Stated Percentage</link:label>
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    <link:label id="lab_mnk_ScheduleofApplicableInterestRateonVariablerateDebtTableTextBlock_99ad3ceb-bb76-4e1c-b1c9-38ba4fb038f8_terseLabel_en-US" xlink:label="lab_mnk_ScheduleofApplicableInterestRateonVariablerateDebtTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Applicable Interest Rate on Variable-rate Debt</link:label>
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    <link:label id="lab_us-gaap_SegmentDomain_b99d67a6-b4af-49be-a97d-95a0d069250f_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment</link:label>
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    <link:label id="lab_us-gaap_ContractWithCustomerDurationAxis_06cddb77-8655-4781-be1d-b043f5550149_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerDurationAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract with Customer, Duration [Axis]</link:label>
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    <link:label id="lab_us-gaap_DebtMember_65b7cebd-f1aa-4c6e-b28c-20eb83aaeea4_terseLabel_en-US" xlink:label="lab_us-gaap_DebtMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtMember" xlink:to="lab_us-gaap_DebtMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_EnviornmentalHealthandSafetyMattersMember_3c8da901-dbac-4345-a324-5acd8f05a25e_terseLabel_en-US" xlink:label="lab_mnk_EnviornmentalHealthandSafetyMattersMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Environmental, Health and Safety Matters</link:label>
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    <link:label id="lab_mnk_LiabilityDefinedBenefitPlanNoncurrentMember_fa5701cf-9dd4-48ac-bb6b-2548f64e81d9_terseLabel_en-US" xlink:label="lab_mnk_LiabilityDefinedBenefitPlanNoncurrentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liability, Defined Benefit Plan, Noncurrent</link:label>
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    <link:label id="lab_mnk_LiabilityDefinedBenefitPlanNoncurrentMember_documentation_en-US" xlink:label="lab_mnk_LiabilityDefinedBenefitPlanNoncurrentMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liability, Defined Benefit Plan, Noncurrent</link:label>
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    <link:label id="lab_us-gaap_LongtermDebtWeightedAverageInterestRate_028c70e5-d6fc-473e-9644-499f0ac7711b_terseLabel_en-US" xlink:label="lab_us-gaap_LongtermDebtWeightedAverageInterestRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt, Weighted Average Interest Rate, at Point in Time</link:label>
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    <link:label id="lab_us-gaap_IncomeTaxesPaidNet_36cf0cbb-4c58-4bf3-add7-ba5c615f9be9_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Taxes Paid, Net</link:label>
    <link:label id="lab_us-gaap_IncomeTaxesPaidNet_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Taxes Paid, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNet" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxesPaidNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxesPaidNet" xlink:to="lab_us-gaap_IncomeTaxesPaidNet" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ActharGelRelatedSettlementUpfrontPayment_14127990-9ead-4497-997a-308eb8b040d8_terseLabel_en-US" xlink:label="lab_mnk_ActharGelRelatedSettlementUpfrontPayment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel-Related Settlement, Upfront Payment</link:label>
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    <link:label id="lab_mnk_ActharGelRelatedSettlementUpfrontPayment_documentation_en-US" xlink:label="lab_mnk_ActharGelRelatedSettlementUpfrontPayment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acthar Gel-Related Settlement, Upfront Payment</link:label>
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    <link:label id="lab_mnk_FFFEnterprisesIncMember_884113b8-63e8-441d-a032-93e2602f8ee2_terseLabel_en-US" xlink:label="lab_mnk_FFFEnterprisesIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">FFF Enterprises, Inc.</link:label>
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    <link:label id="lab_mnk_FFFEnterprisesIncMember_documentation_en-US" xlink:label="lab_mnk_FFFEnterprisesIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">FFF Enterprises, Inc.</link:label>
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    <link:label id="lab_us-gaap_SubsequentEventsTextBlock_72f13405-efb1-46fa-8af9-e6401eb00a3a_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsequent Events</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventsTextBlock" xlink:to="lab_us-gaap_SubsequentEventsTextBlock" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_CorporateMember_db1dcdb0-ed4c-446d-92c8-82b178fda7cb_terseLabel_en-US" xlink:label="lab_us-gaap_CorporateMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Corporate</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CorporateMember" xlink:to="lab_us-gaap_CorporateMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_Revenue_a8386ced-d20c-49f2-aabc-6d26d705c46e_terseLabel_en-US" xlink:label="lab_mnk_Revenue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue</link:label>
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    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_9b863a24-d8ee-41c6-98a6-8749c48d9237_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loss from continuing operations</link:label>
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    <link:label id="lab_us-gaap_AccountsPayableCurrent_d60d7d2d-8ce0-45b7-90b2-da1c992bf633_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts payable</link:label>
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    <link:label id="lab_us-gaap_ConcentrationRiskByTypeAxis_23728636-ccb1-4ebf-8349-6cbdc36c6711_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskByTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk Type [Axis]</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant and Equipment Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ExchangedDebtInstrumentAxis_9ed066bf-ffef-4bcb-902a-d40759a877af_terseLabel_en-US" xlink:label="lab_mnk_ExchangedDebtInstrumentAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exchanged Debt Instrument [Axis]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_mnk_ExchangedDebtInstrumentAxis" xlink:href="mnk-20220701.xsd#mnk_ExchangedDebtInstrumentAxis"/>
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    <link:label id="lab_us-gaap_OtherLiabilitiesNoncurrent_9251fce7-5aca-4281-beec-7f9cecdb3378_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other liabilities</link:label>
    <link:label id="lab_us-gaap_OtherLiabilitiesNoncurrent_label_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Liabilities, Noncurrent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
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    <link:label id="lab_mnk_OtherAssetsReorganizationAdjustment_label_en-US" xlink:label="lab_mnk_OtherAssetsReorganizationAdjustment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Assets, Reorganization Adjustment</link:label>
    <link:label id="lab_mnk_OtherAssetsReorganizationAdjustment_documentation_en-US" xlink:label="lab_mnk_OtherAssetsReorganizationAdjustment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Assets, Reorganization Adjustment</link:label>
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    <link:label id="lab_mnk_RestructuringandRelatedCostsTotalChargesExpectedtobeSettledinCash_aafd1693-a407-46a5-aaf8-16b43cde561b_verboseLabel_en-US" xlink:label="lab_mnk_RestructuringandRelatedCostsTotalChargesExpectedtobeSettledinCash" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total charges expected to be settled in cash</link:label>
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    <link:label id="lab_mnk_GenericsIPRDMember_documentation_en-US" xlink:label="lab_mnk_GenericsIPRDMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Generics IPR&amp;D</link:label>
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    <link:label id="lab_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_9adf243a-b3d3-4017-b4af-fb76b3fb23b4_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Future Amortization Expense, Intangible Assets</link:label>
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    <link:label id="lab_mnk_OtherLiabilitiesFairValueMember_e8587894-5353-4982-8987-039e086620df_terseLabel_en-US" xlink:label="lab_mnk_OtherLiabilitiesFairValueMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Liabilities, Fair Value</link:label>
    <link:label id="lab_mnk_OtherLiabilitiesFairValueMember_label_en-US" xlink:label="lab_mnk_OtherLiabilitiesFairValueMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Liabilities, Fair Value [Member]</link:label>
    <link:label id="lab_mnk_OtherLiabilitiesFairValueMember_documentation_en-US" xlink:label="lab_mnk_OtherLiabilitiesFairValueMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Liabilities, Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_OtherLiabilitiesFairValueMember" xlink:href="mnk-20220701.xsd#mnk_OtherLiabilitiesFairValueMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_OtherLiabilitiesFairValueMember" xlink:to="lab_mnk_OtherLiabilitiesFairValueMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EarningsPerShareAbstract_0846b263-51cb-4b10-8b8e-43544f33c055_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Per Share [Abstract]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_mnk_ScheduleOfLiabilitiesSubjectToCompromiseLineItems" xlink:href="mnk-20220701.xsd#mnk_ScheduleOfLiabilitiesSubjectToCompromiseLineItems"/>
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    <link:label id="lab_us-gaap_AccountsPayableMember_ceeb5eb5-bf28-44bd-b9dc-fa6de0c00252_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts Payable</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentGross_011a8307-0572-4b88-80e7-4cb807524faf_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGross" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment, gross</link:label>
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    <link:label id="lab_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_eebe4a9f-03e8-47d7-857e-97ad65664f0f_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Currency translation adjustments</link:label>
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    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerMember_3bff50e2-68b0-4030-a0d5-fad319c1546f_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue from Contract with Customer Benchmark [Member]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_mnk_FreshStartAdjustmentsTypeOfAdjustmentAxis" xlink:href="mnk-20220701.xsd#mnk_FreshStartAdjustmentsTypeOfAdjustmentAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_FreshStartAdjustmentsTypeOfAdjustmentAxis" xlink:to="lab_mnk_FreshStartAdjustmentsTypeOfAdjustmentAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionDomain_ae425a42-87b7-4190-8ca0-e023fe04fd34_terseLabel_en-US" xlink:label="lab_mnk_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Domain]</link:label>
    <link:label id="lab_mnk_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionDomain_label_en-US" xlink:label="lab_mnk_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Domain]</link:label>
    <link:label id="lab_mnk_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionDomain_documentation_en-US" xlink:label="lab_mnk_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Domain] for Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionDomain" xlink:href="mnk-20220701.xsd#mnk_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionDomain" xlink:to="lab_mnk_RevenueRemainingPerformanceObligationExpectedTimingofSatisfactionDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_245f3592-495b-41f7-9f9a-fc05d1a87138_terseLabel_en-US" xlink:label="lab_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Warrant or Right, Exercise Price of Warrants or Rights</link:label>
    <link:label id="lab_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_label_en-US" xlink:label="lab_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Warrant or Right, Exercise Price of Warrants or Rights</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:to="lab_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TrademarksMember_bb4a6a15-45d9-4a64-b00c-63148d0825b0_terseLabel_en-US" xlink:label="lab_us-gaap_TrademarksMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trademarks</link:label>
    <link:label id="lab_us-gaap_TrademarksMember_label_en-US" xlink:label="lab_us-gaap_TrademarksMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trademarks [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TrademarksMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TrademarksMember" xlink:to="lab_us-gaap_TrademarksMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ExchangedDebtInstrumentDomain_9dd03539-0cb7-4c09-9b91-cd2be562253c_terseLabel_en-US" xlink:label="lab_mnk_ExchangedDebtInstrumentDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exchanged Debt Instrument [Domain]</link:label>
    <link:label id="lab_mnk_ExchangedDebtInstrumentDomain_label_en-US" xlink:label="lab_mnk_ExchangedDebtInstrumentDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exchanged Debt Instrument [Domain]</link:label>
    <link:label id="lab_mnk_ExchangedDebtInstrumentDomain_documentation_en-US" xlink:label="lab_mnk_ExchangedDebtInstrumentDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Domain] for Exchanged Debt Instrument [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ExchangedDebtInstrumentDomain" xlink:href="mnk-20220701.xsd#mnk_ExchangedDebtInstrumentDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_ExchangedDebtInstrumentDomain" xlink:to="lab_mnk_ExchangedDebtInstrumentDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherCurrentLiabilitiesMember_b6689218-fb09-46e5-b148-a244b16c3076_terseLabel_en-US" xlink:label="lab_us-gaap_OtherCurrentLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued and other current liabilities</link:label>
    <link:label id="lab_us-gaap_OtherCurrentLiabilitiesMember_label_en-US" xlink:label="lab_us-gaap_OtherCurrentLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Current Liabilities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentLiabilitiesMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherCurrentLiabilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherCurrentLiabilitiesMember" xlink:to="lab_us-gaap_OtherCurrentLiabilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare_f661b289-946c-4fd1-9406-f300d7fc8ab2_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income from discontinued operations</link:label>
    <link:label id="lab_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare_label_en-US" xlink:label="lab_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare" xlink:to="lab_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ReorganizationsLineItems_ad6b811d-f228-4da4-8624-b1ed63fba2d2_terseLabel_en-US" xlink:label="lab_mnk_ReorganizationsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganizations [Line Items]</link:label>
    <link:label id="lab_mnk_ReorganizationsLineItems_label_en-US" xlink:label="lab_mnk_ReorganizationsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganizations [Line Items]</link:label>
    <link:label id="lab_mnk_ReorganizationsLineItems_documentation_en-US" xlink:label="lab_mnk_ReorganizationsLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganizations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ReorganizationsLineItems" xlink:href="mnk-20220701.xsd#mnk_ReorganizationsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_ReorganizationsLineItems" xlink:to="lab_mnk_ReorganizationsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_IncomeTaxesLineItems_9c3c6f67-8570-410a-9b2a-415b085c210e_terseLabel_en-US" xlink:label="lab_mnk_IncomeTaxesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Taxes [Line Items]</link:label>
    <link:label id="lab_mnk_IncomeTaxesLineItems_label_en-US" xlink:label="lab_mnk_IncomeTaxesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Taxes [Line Items]</link:label>
    <link:label id="lab_mnk_IncomeTaxesLineItems_documentation_en-US" xlink:label="lab_mnk_IncomeTaxesLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Line Items] for Income Taxes [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_IncomeTaxesLineItems" xlink:href="mnk-20220701.xsd#mnk_IncomeTaxesLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_IncomeTaxesLineItems" xlink:to="lab_mnk_IncomeTaxesLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_CrabOrchardNationalWildlifeRefugeSuperfundSiteMember_95773194-cd4d-44fa-abe5-d21dea4b6a54_terseLabel_en-US" xlink:label="lab_mnk_CrabOrchardNationalWildlifeRefugeSuperfundSiteMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Crab Orchard National Wildlife Refuge Superfund Site</link:label>
    <link:label id="lab_mnk_CrabOrchardNationalWildlifeRefugeSuperfundSiteMember_label_en-US" xlink:label="lab_mnk_CrabOrchardNationalWildlifeRefugeSuperfundSiteMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Crab Orchard National Wildlife Refuge Superfund Site [Member]</link:label>
    <link:label id="lab_mnk_CrabOrchardNationalWildlifeRefugeSuperfundSiteMember_documentation_en-US" xlink:label="lab_mnk_CrabOrchardNationalWildlifeRefugeSuperfundSiteMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Crab Orchard National Wildlife Refuge Superfund Site</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_CrabOrchardNationalWildlifeRefugeSuperfundSiteMember" xlink:href="mnk-20220701.xsd#mnk_CrabOrchardNationalWildlifeRefugeSuperfundSiteMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_CrabOrchardNationalWildlifeRefugeSuperfundSiteMember" xlink:to="lab_mnk_CrabOrchardNationalWildlifeRefugeSuperfundSiteMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_PaymentOfProfessionalFees_0447d2c4-d8a1-4d1d-a7be-8408c064c7d2_terseLabel_en-US" xlink:label="lab_mnk_PaymentOfProfessionalFees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment of Professional Fees</link:label>
    <link:label id="lab_mnk_PaymentOfProfessionalFees_label_en-US" xlink:label="lab_mnk_PaymentOfProfessionalFees" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment of Professional Fees</link:label>
    <link:label id="lab_mnk_PaymentOfProfessionalFees_documentation_en-US" xlink:label="lab_mnk_PaymentOfProfessionalFees" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment of Professional Fees</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_PaymentOfProfessionalFees" xlink:href="mnk-20220701.xsd#mnk_PaymentOfProfessionalFees"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_PaymentOfProfessionalFees" xlink:to="lab_mnk_PaymentOfProfessionalFees" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermDebtNoncurrent_5a30ae2e-c928-4fd6-9c7e-97961b4f0605_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt, Excluding Current Maturities</link:label>
    <link:label id="lab_us-gaap_LongTermDebtNoncurrent_label_en-US" xlink:label="lab_us-gaap_LongTermDebtNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt, Excluding Current Maturities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtNoncurrent" xlink:to="lab_us-gaap_LongTermDebtNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_IncreaseDecreaseIncomeTaxExpenseBenefitDeferredTaxLiabilitiesFreshStartAdjustments_84fd8385-19ae-4c80-b454-f301e44e618a_terseLabel_en-US" xlink:label="lab_mnk_IncreaseDecreaseIncomeTaxExpenseBenefitDeferredTaxLiabilitiesFreshStartAdjustments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) Income Tax Expense (Benefit), Deferred Tax Liabilities Fresh Start Adjustments</link:label>
    <link:label id="lab_mnk_IncreaseDecreaseIncomeTaxExpenseBenefitDeferredTaxLiabilitiesFreshStartAdjustments_label_en-US" xlink:label="lab_mnk_IncreaseDecreaseIncomeTaxExpenseBenefitDeferredTaxLiabilitiesFreshStartAdjustments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) Income Tax Expense (Benefit), Deferred Tax Liabilities Fresh Start Adjustments</link:label>
    <link:label id="lab_mnk_IncreaseDecreaseIncomeTaxExpenseBenefitDeferredTaxLiabilitiesFreshStartAdjustments_documentation_en-US" xlink:label="lab_mnk_IncreaseDecreaseIncomeTaxExpenseBenefitDeferredTaxLiabilitiesFreshStartAdjustments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) Income Tax Expense (Benefit), Deferred Tax Liabilities Fresh Start Adjustments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_IncreaseDecreaseIncomeTaxExpenseBenefitDeferredTaxLiabilitiesFreshStartAdjustments" xlink:href="mnk-20220701.xsd#mnk_IncreaseDecreaseIncomeTaxExpenseBenefitDeferredTaxLiabilitiesFreshStartAdjustments"/>
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    <link:label id="lab_us-gaap_LiabilitiesFairValueDisclosureAbstract_ef16edb5-ee8e-45ae-bc99-3c2aad95cbcf_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesFairValueDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities:</link:label>
    <link:label id="lab_us-gaap_LiabilitiesFairValueDisclosureAbstract_label_en-US" xlink:label="lab_us-gaap_LiabilitiesFairValueDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities, Fair Value Disclosure [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosureAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract" xlink:to="lab_us-gaap_LiabilitiesFairValueDisclosureAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_OpioidRelatedSettlementUpfrontPaymentPrefundedAmount_4690c284-7dc1-41d6-bfcc-b879bd35639e_terseLabel_en-US" xlink:label="lab_mnk_OpioidRelatedSettlementUpfrontPaymentPrefundedAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid-Related Settlement, Upfront Payment, Prefunded Amount</link:label>
    <link:label id="lab_mnk_OpioidRelatedSettlementUpfrontPaymentPrefundedAmount_label_en-US" xlink:label="lab_mnk_OpioidRelatedSettlementUpfrontPaymentPrefundedAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid-Related Settlement, Upfront Payment, Prefunded Amount</link:label>
    <link:label id="lab_mnk_OpioidRelatedSettlementUpfrontPaymentPrefundedAmount_documentation_en-US" xlink:label="lab_mnk_OpioidRelatedSettlementUpfrontPaymentPrefundedAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid-Related Settlement, Upfront Payment, Prefunded Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_OpioidRelatedSettlementUpfrontPaymentPrefundedAmount" xlink:href="mnk-20220701.xsd#mnk_OpioidRelatedSettlementUpfrontPaymentPrefundedAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_OpioidRelatedSettlementUpfrontPaymentPrefundedAmount" xlink:to="lab_mnk_OpioidRelatedSettlementUpfrontPaymentPrefundedAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCurrentReportingStatus_d4265b86-00b2-4384-b7e7-36df1adcb323_terseLabel_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Current Reporting Status</link:label>
    <link:label id="lab_dei_EntityCurrentReportingStatus_label_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Current Reporting Status</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityCurrentReportingStatus"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCurrentReportingStatus" xlink:to="lab_dei_EntityCurrentReportingStatus" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EarningsPerShareBasicLineItems_4d09c63e-aa17-440b-9af1-44a9a6c9e440_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasicLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Per Share</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasicLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EarningsPerShareBasicLineItems"/>
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    <link:label id="lab_us-gaap_ContractWithCustomerDurationDomain_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerDurationDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract with Customer, Duration [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerDurationDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerDurationDomain"/>
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    <link:label id="lab_mnk_AdequateProtectionPaymentExpense_f72a52d6-2b98-48bd-923f-bf2c06811d78_terseLabel_en-US" xlink:label="lab_mnk_AdequateProtectionPaymentExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adequate Protection Payment, Expense</link:label>
    <link:label id="lab_mnk_AdequateProtectionPaymentExpense_label_en-US" xlink:label="lab_mnk_AdequateProtectionPaymentExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adequate Protection Payment, Expense</link:label>
    <link:label id="lab_mnk_AdequateProtectionPaymentExpense_documentation_en-US" xlink:label="lab_mnk_AdequateProtectionPaymentExpense" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adequate Protection Payment, Expense</link:label>
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    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_f95d8c7c-0838-4d55-95b2-6b595285c33a_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Effective tax rate</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Percent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
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    <link:label id="lab_us-gaap_LossContingencyEstimateOfPossibleLoss_label_en-US" xlink:label="lab_us-gaap_LossContingencyEstimateOfPossibleLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loss Contingency, Estimate of Possible Loss</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyEstimateOfPossibleLoss" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingencyEstimateOfPossibleLoss"/>
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    <link:label id="lab_us-gaap_IndemnificationGuaranteeMember_e4c99546-60e1-42f3-b34d-408ff021dbc1_terseLabel_en-US" xlink:label="lab_us-gaap_IndemnificationGuaranteeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Indemnification Agreement</link:label>
    <link:label id="lab_us-gaap_IndemnificationGuaranteeMember_label_en-US" xlink:label="lab_us-gaap_IndemnificationGuaranteeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Indemnification Agreement [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndemnificationGuaranteeMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndemnificationGuaranteeMember"/>
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    <link:label id="lab_mnk_RestructuringChargesBySegmentTableTextBlock_a190776b-a90c-47da-994a-827db91e24ad_verboseLabel_en-US" xlink:label="lab_mnk_RestructuringChargesBySegmentTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Restructuring and Related Charges by Segment</link:label>
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    <link:label id="lab_mnk_RestructuringChargesBySegmentTableTextBlock_documentation_en-US" xlink:label="lab_mnk_RestructuringChargesBySegmentTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount of restructuring charges incurred during the period by segment.</link:label>
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    <link:label id="lab_us-gaap_DebtCurrent_f93f6f9e-b2b5-414d-90c6-0afc04258f7c_terseLabel_en-US" xlink:label="lab_us-gaap_DebtCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt, Current</link:label>
    <link:label id="lab_us-gaap_DebtCurrent_label_en-US" xlink:label="lab_us-gaap_DebtCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt, Current</link:label>
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    <link:label id="lab_mnk_FivePointSixTwoFivePercentNoteMember_c97f90e5-2fff-4d8d-8261-dfdc432f2d08_terseLabel_en-US" xlink:label="lab_mnk_FivePointSixTwoFivePercentNoteMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">5.625% Senior Notes</link:label>
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    <link:label id="lab_mnk_FivePointSixTwoFivePercentNoteMember_documentation_en-US" xlink:label="lab_mnk_FivePointSixTwoFivePercentNoteMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Five Point Six Two Five Percent Note [Member]</link:label>
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    <link:label id="lab_mnk_TermLoansdueSept2024andFeb2025Member_9d18e75e-0f33-495f-9d34-5c60469e4e6e_terseLabel_en-US" xlink:label="lab_mnk_TermLoansdueSept2024andFeb2025Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term Loans due Sept 2024 and Feb 2025</link:label>
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    <link:label id="lab_us-gaap_CommonClassAMember_4bce6e0b-c56b-4fbb-b8dc-f3a8c299cdec_terseLabel_en-US" xlink:label="lab_us-gaap_CommonClassAMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ordinary A</link:label>
    <link:label id="lab_us-gaap_CommonClassAMember_label_en-US" xlink:label="lab_us-gaap_CommonClassAMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common Class A [Member]</link:label>
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    <link:label id="lab_mnk_FreshStartFourColumnBalanceSheetTableTextBlock_aece7cee-5196-479e-8421-3697c7a15bbc_terseLabel_en-US" xlink:label="lab_mnk_FreshStartFourColumnBalanceSheetTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Four Column Balance Sheet</link:label>
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    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_9095ac33-b484-4360-b62b-92fb378bb51f_terseLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents</link:label>
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    <link:label id="lab_us-gaap_CommonStockParOrStatedValuePerShare_b353c5b3-75f5-4e81-888a-4133723e44ef_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockParOrStatedValuePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ordinary shares, par value (in usd per share)</link:label>
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    <link:label id="lab_us-gaap_GuaranteeObligationsMaximumExposure_17e33c8d-3272-4755-90ee-f580f13aee75_terseLabel_en-US" xlink:label="lab_us-gaap_GuaranteeObligationsMaximumExposure" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maximum future payments</link:label>
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    <link:label id="lab_us-gaap_SchedulesOfConcentrationOfRiskByRiskFactorTextBlock_8943b933-f2aa-4056-a70f-dc8dfb8e76a0_terseLabel_en-US" xlink:label="lab_us-gaap_SchedulesOfConcentrationOfRiskByRiskFactorTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedules of Concentration of Risk</link:label>
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    <link:label id="lab_us-gaap_ContractWithCustomerSalesChannelDomain_ed1d4f86-c474-46a4-a081-4bf1cc3eb8a3_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerSalesChannelDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract with Customer, Sales Channel [Domain]</link:label>
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finite-Lived Intangible Assets, Major Class Name [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RoyaltyMember_240e3424-0b8d-4f16-bfac-0e91ce087bfc_terseLabel_en-US" xlink:label="lab_us-gaap_RoyaltyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Royalty [Member]</link:label>
    <link:label id="lab_us-gaap_RoyaltyMember_label_en-US" xlink:label="lab_us-gaap_RoyaltyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Royalty [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RoyaltyMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RoyaltyMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RoyaltyMember" xlink:to="lab_us-gaap_RoyaltyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressAddressLine1_cad69c25-2344-4889-9a05-34016d32ff25_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:label id="lab_dei_EntityAddressAddressLine1_label_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressAddressLine1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine1" xlink:to="lab_dei_EntityAddressAddressLine1" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_5201acec-d368-4203-a9be-64000c00ab69_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_1fa2c22a-6f94-4b50-865b-3cab5c2f4548_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Cash From Investing Activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressAddressLine2_df9a38a3-2f78-42e8-9216-74ae678d0556_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line Two</link:label>
    <link:label id="lab_dei_EntityAddressAddressLine2_label_en-US" xlink:label="lab_dei_EntityAddressAddressLine2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line Two</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressAddressLine2"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine2" xlink:to="lab_dei_EntityAddressAddressLine2" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_3efd55fe-1358-4007-8300-e9f5aff1f6ce_terseLabel_en-US" xlink:label="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Portion at Fair Value Measurement</link:label>
    <link:label id="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_label_en-US" xlink:label="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Portion at Fair Value Measurement [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:to="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_6072f8ac-eb8d-4295-82fe-0882c86e7b60_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Changes in assets and liabilities:</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Operating Capital [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressAddressLine3_146f38e7-7fa5-4da8-9ba0-45a15ec9f002_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line Three</link:label>
    <link:label id="lab_dei_EntityAddressAddressLine3_label_en-US" xlink:label="lab_dei_EntityAddressAddressLine3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line Three</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine3" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressAddressLine3"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine3" xlink:to="lab_dei_EntityAddressAddressLine3" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_6acfa2ba-36d4-43ba-9e90-fca79173d59c_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Less: accumulated depreciation</link:label>
    <link:label id="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_label_en-US" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:to="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_YearThreeMember_a91d2663-e328-4fac-ab13-ea1265bdec2c_terseLabel_en-US" xlink:label="lab_mnk_YearThreeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fiscal 2024</link:label>
    <link:label id="lab_mnk_YearThreeMember_label_en-US" xlink:label="lab_mnk_YearThreeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Year Three [Member]</link:label>
    <link:label id="lab_mnk_YearThreeMember_documentation_en-US" xlink:label="lab_mnk_YearThreeMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Year Three [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_YearThreeMember" xlink:href="mnk-20220701.xsd#mnk_YearThreeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_YearThreeMember" xlink:to="lab_mnk_YearThreeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_5f28a9a9-4136-4ce8-847a-bbcffbee6118_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash Flows From Operating Activities:</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityShellCompany_7e8bd206-a5b5-4579-bb2f-6fc288fb0db3_terseLabel_en-US" xlink:label="lab_dei_EntityShellCompany" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Shell Company</link:label>
    <link:label id="lab_dei_EntityShellCompany_label_en-US" xlink:label="lab_dei_EntityShellCompany" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Shell Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityShellCompany"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityShellCompany" xlink:to="lab_dei_EntityShellCompany" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LiabilitiesCurrent_031e729f-73b3-483d-ad07-5bbeab6eda37_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total current liabilities</link:label>
    <link:label id="lab_us-gaap_LiabilitiesCurrent_2ec4ae4d-602d-4f67-a666-aee1f3348d2b_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities, Current</link:label>
    <link:label id="lab_us-gaap_LiabilitiesCurrent_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesCurrent" xlink:to="lab_us-gaap_LiabilitiesCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ClassOfStockDomain_7dd61c53-6534-4892-bb7c-983e38cc4ba3_terseLabel_en-US" xlink:label="lab_us-gaap_ClassOfStockDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Stock [Domain]</link:label>
    <link:label id="lab_us-gaap_ClassOfStockDomain_label_en-US" xlink:label="lab_us-gaap_ClassOfStockDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Stock [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ClassOfStockDomain" xlink:to="lab_us-gaap_ClassOfStockDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_FreshStartAdjustmentsAOCICTA_1117a0a4-0078-447e-8425-f4d0a6600cf2_terseLabel_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsAOCICTA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, AOCI, CTA</link:label>
    <link:label id="lab_mnk_FreshStartAdjustmentsAOCICTA_label_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsAOCICTA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, AOCI, CTA</link:label>
    <link:label id="lab_mnk_FreshStartAdjustmentsAOCICTA_documentation_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsAOCICTA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh-Start Adjustments, AOCI, CTA</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_FreshStartAdjustmentsAOCICTA" xlink:href="mnk-20220701.xsd#mnk_FreshStartAdjustmentsAOCICTA"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_FreshStartAdjustmentsAOCICTA" xlink:to="lab_mnk_FreshStartAdjustmentsAOCICTA" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_ReorganizationItemsNetLossOnFreshStartAdjustments_7eaba9fd-edd6-4785-849b-ea088edf3fb1_terseLabel_en-US" xlink:label="lab_mnk_ReorganizationItemsNetLossOnFreshStartAdjustments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Items, net, Loss on Fresh-Start Adjustments</link:label>
    <link:label id="lab_mnk_ReorganizationItemsNetLossOnFreshStartAdjustments_label_en-US" xlink:label="lab_mnk_ReorganizationItemsNetLossOnFreshStartAdjustments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Items, net, Loss on Fresh-Start Adjustments</link:label>
    <link:label id="lab_mnk_ReorganizationItemsNetLossOnFreshStartAdjustments_documentation_en-US" xlink:label="lab_mnk_ReorganizationItemsNetLossOnFreshStartAdjustments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reorganization Items, net, Loss on Fresh-Start Adjustments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ReorganizationItemsNetLossOnFreshStartAdjustments" xlink:href="mnk-20220701.xsd#mnk_ReorganizationItemsNetLossOnFreshStartAdjustments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_ReorganizationItemsNetLossOnFreshStartAdjustments" xlink:to="lab_mnk_ReorganizationItemsNetLossOnFreshStartAdjustments" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_TherakosMember_a2771c81-ccf1-4a84-9c7b-2f2ac9b4d1b8_terseLabel_en-US" xlink:label="lab_mnk_TherakosMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Therakos [Member]</link:label>
    <link:label id="lab_mnk_TherakosMember_ea9e5f82-851c-4d60-a6f3-7dc4a86fb4bb_verboseLabel_en-US" xlink:label="lab_mnk_TherakosMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Therakos immunotherapy</link:label>
    <link:label id="lab_mnk_TherakosMember_label_en-US" xlink:label="lab_mnk_TherakosMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Therakos [Member]</link:label>
    <link:label id="lab_mnk_TherakosMember_documentation_en-US" xlink:label="lab_mnk_TherakosMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Therakos</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_TherakosMember" xlink:href="mnk-20220701.xsd#mnk_TherakosMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_TherakosMember" xlink:to="lab_mnk_TherakosMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RestructuringReserveAcceleratedDepreciation_92bd2057-6f92-4b45-a28d-d3e2c8612ce2_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_RestructuringReserveAcceleratedDepreciation" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring and Related Cost, Accelerated Depreciation</link:label>
    <link:label id="lab_us-gaap_RestructuringReserveAcceleratedDepreciation_label_en-US" xlink:label="lab_us-gaap_RestructuringReserveAcceleratedDepreciation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring and Related Cost, Accelerated Depreciation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveAcceleratedDepreciation" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringReserveAcceleratedDepreciation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestructuringReserveAcceleratedDepreciation" xlink:to="lab_us-gaap_RestructuringReserveAcceleratedDepreciation" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_OpioidClaimantTrustMember_3d65f221-36b8-4c8d-ab00-b6e7fc47ce07_terseLabel_en-US" xlink:label="lab_mnk_OpioidClaimantTrustMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid Claimant Trust [Member]</link:label>
    <link:label id="lab_mnk_OpioidClaimantTrustMember_label_en-US" xlink:label="lab_mnk_OpioidClaimantTrustMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid Claimant Trust [Member]</link:label>
    <link:label id="lab_mnk_OpioidClaimantTrustMember_documentation_en-US" xlink:label="lab_mnk_OpioidClaimantTrustMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Opioid Claimant Trust [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_OpioidClaimantTrustMember" xlink:href="mnk-20220701.xsd#mnk_OpioidClaimantTrustMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_OpioidClaimantTrustMember" xlink:to="lab_mnk_OpioidClaimantTrustMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_AsbestosRelatedLiabilityMember_9201e067-39ad-4579-89bf-a126289a5c3f_terseLabel_en-US" xlink:label="lab_mnk_AsbestosRelatedLiabilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asbestos-related liability</link:label>
    <link:label id="lab_mnk_AsbestosRelatedLiabilityMember_label_en-US" xlink:label="lab_mnk_AsbestosRelatedLiabilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asbestos-related liability [Member]</link:label>
    <link:label id="lab_mnk_AsbestosRelatedLiabilityMember_documentation_en-US" xlink:label="lab_mnk_AsbestosRelatedLiabilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asbestos-related liability</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_AsbestosRelatedLiabilityMember" xlink:href="mnk-20220701.xsd#mnk_AsbestosRelatedLiabilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_AsbestosRelatedLiabilityMember" xlink:to="lab_mnk_AsbestosRelatedLiabilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_b05677e0-e636-45d9-a0e1-d2551764727a_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of Credit Facility, Maximum Borrowing Capacity</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of Credit Facility, Maximum Borrowing Capacity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:to="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LossContingenciesTable_cefac2e6-e689-4ba2-81f1-d0ba88baf50e_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingenciesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loss Contingencies [Table]</link:label>
    <link:label id="lab_us-gaap_LossContingenciesTable_label_en-US" xlink:label="lab_us-gaap_LossContingenciesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loss Contingencies [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingenciesTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingenciesTable" xlink:to="lab_us-gaap_LossContingenciesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_a90a03ca-4040-4ac9-8be4-d0242bf4c537_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net sales</link:label>
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_label_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue from Contract with Customer, Including Assessed Tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:to="lab_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SegmentReportingInformationLineItems_b711529d-5890-4963-8b44-86ddadcbed05_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingInformationLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment Reporting Information</link:label>
    <link:label id="lab_us-gaap_SegmentReportingInformationLineItems_label_en-US" xlink:label="lab_us-gaap_SegmentReportingInformationLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment Reporting Information [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems" xlink:to="lab_us-gaap_SegmentReportingInformationLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_OwnershipDomain_e6ad28b6-8f12-4ff0-a22e-1c2985c66353_terseLabel_en-US" xlink:label="lab_srt_OwnershipDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ownership [Domain]</link:label>
    <link:label id="lab_srt_OwnershipDomain_label_en-US" xlink:label="lab_srt_OwnershipDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ownership [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_OwnershipDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_OwnershipDomain" xlink:to="lab_srt_OwnershipDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CurrentFiscalYearEndDate_a6b712c3-19d6-4b0d-aab3-a2ed52541eeb_terseLabel_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:label id="lab_dei_CurrentFiscalYearEndDate_label_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CurrentFiscalYearEndDate" xlink:to="lab_dei_CurrentFiscalYearEndDate" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_FourPointSevenFivePercentNoteMember_e7fd366c-5afc-4140-81b5-4540b41f441a_terseLabel_en-US" xlink:label="lab_mnk_FourPointSevenFivePercentNoteMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">4.75% Senior Notes</link:label>
    <link:label id="lab_mnk_FourPointSevenFivePercentNoteMember_label_en-US" xlink:label="lab_mnk_FourPointSevenFivePercentNoteMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Four Point Seven Five Percent Note [Member]</link:label>
    <link:label id="lab_mnk_FourPointSevenFivePercentNoteMember_documentation_en-US" xlink:label="lab_mnk_FourPointSevenFivePercentNoteMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Four Point Seven Five Percent Note [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_FourPointSevenFivePercentNoteMember" xlink:href="mnk-20220701.xsd#mnk_FourPointSevenFivePercentNoteMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_FourPointSevenFivePercentNoteMember" xlink:to="lab_mnk_FourPointSevenFivePercentNoteMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_92e3a9f6-dffe-4cd4-8b17-afa0a2c04d48_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentNameDomain" xlink:to="lab_us-gaap_DebtInstrumentNameDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementTable_867d1ea4-4768-43b0-a391-ba530a8c9e6d_terseLabel_en-US" xlink:label="lab_us-gaap_StatementTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement [Table]</link:label>
    <link:label id="lab_us-gaap_StatementTable_label_en-US" xlink:label="lab_us-gaap_StatementTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementTable" xlink:to="lab_us-gaap_StatementTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccrualForEnvironmentalLossContingencies_f6d2f8b9-35ee-4b4a-832a-41319547f9fa_terseLabel_en-US" xlink:label="lab_us-gaap_AccrualForEnvironmentalLossContingencies" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Environmental liabilities</link:label>
    <link:label id="lab_us-gaap_AccrualForEnvironmentalLossContingencies_label_en-US" xlink:label="lab_us-gaap_AccrualForEnvironmentalLossContingencies" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrual for Environmental Loss Contingencies</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccrualForEnvironmentalLossContingencies" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccrualForEnvironmentalLossContingencies"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccrualForEnvironmentalLossContingencies" xlink:to="lab_us-gaap_AccrualForEnvironmentalLossContingencies" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent_dc687ff6-ab5e-4fd9-944b-5e61c3eb0a6e_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets Held-for-sale, Not Part of Disposal Group, Current</link:label>
    <link:label id="lab_us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent_label_en-US" xlink:label="lab_us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets Held-for-sale, Not Part of Disposal Group, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent" xlink:to="lab_us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RestructuringAndRelatedCostCostIncurredToDate1_f2b28e7a-b3c1-44d3-afaf-4fe811b264f3_verboseLabel_en-US" xlink:label="lab_us-gaap_RestructuringAndRelatedCostCostIncurredToDate1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring costs incurred cumulative to date</link:label>
    <link:label id="lab_us-gaap_RestructuringAndRelatedCostCostIncurredToDate1_label_en-US" xlink:label="lab_us-gaap_RestructuringAndRelatedCostCostIncurredToDate1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restructuring and Related Cost, Cost Incurred to Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostCostIncurredToDate1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringAndRelatedCostCostIncurredToDate1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestructuringAndRelatedCostCostIncurredToDate1" xlink:to="lab_us-gaap_RestructuringAndRelatedCostCostIncurredToDate1" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_DebenturesMember_54bcd81a-e232-41d7-abbb-fb55e22c14dc_terseLabel_en-US" xlink:label="lab_mnk_DebenturesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debentures</link:label>
    <link:label id="lab_mnk_DebenturesMember_label_en-US" xlink:label="lab_mnk_DebenturesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debentures [Member]</link:label>
    <link:label id="lab_mnk_DebenturesMember_documentation_en-US" xlink:label="lab_mnk_DebenturesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debentures [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_DebenturesMember" xlink:href="mnk-20220701.xsd#mnk_DebenturesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_DebenturesMember" xlink:to="lab_mnk_DebenturesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_OwnershipInterestMember_6c47f121-fb62-4a8b-ad03-0031cab5907f_terseLabel_en-US" xlink:label="lab_mnk_OwnershipInterestMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Ownership Interest [Member]</link:label>
    <link:label id="lab_mnk_OwnershipInterestMember_label_en-US" xlink:label="lab_mnk_OwnershipInterestMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ownership Interest [Member]</link:label>
    <link:label id="lab_mnk_OwnershipInterestMember_documentation_en-US" xlink:label="lab_mnk_OwnershipInterestMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ownership Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_OwnershipInterestMember" xlink:href="mnk-20220701.xsd#mnk_OwnershipInterestMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mnk_OwnershipInterestMember" xlink:to="lab_mnk_OwnershipInterestMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_RangeAxis_58394e71-4251-4bce-9bc5-2535e5cf712a_terseLabel_en-US" xlink:label="lab_srt_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statistical Measurement [Axis]</link:label>
    <link:label id="lab_srt_RangeAxis_label_en-US" xlink:label="lab_srt_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statistical Measurement [Axis]</link:label>
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    <link:label id="lab_us-gaap_SubsequentEventMember_5134f260-10aa-4cc7-9268-401b5d15ec46_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsequent Event [Member]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventMember_label_en-US" xlink:label="lab_us-gaap_SubsequentEventMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsequent Event [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventMember" xlink:to="lab_us-gaap_SubsequentEventMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mnk_FreshStartAdjustmentsTypeOfFreshStartAdjustmentDomain_0e2aad80-7494-4484-9d9b-c19aa93a0fa7_terseLabel_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsTypeOfFreshStartAdjustmentDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh Start Adjustments Type of Fresh Start Adjustment [Domain]</link:label>
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    <link:label id="lab_mnk_FreshStartAdjustmentsTypeOfFreshStartAdjustmentDomain_documentation_en-US" xlink:label="lab_mnk_FreshStartAdjustmentsTypeOfFreshStartAdjustmentDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fresh Start Adjustments Type of Fresh Start Adjustment [Domain]</link:label>
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    <link:label id="lab_us-gaap_ExtinguishmentOfDebtAmount_28f1da77-e88a-40cc-bd52-be1e0dd1c92b_terseLabel_en-US" xlink:label="lab_us-gaap_ExtinguishmentOfDebtAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Extinguishment of Debt, Amount</link:label>
    <link:label id="lab_us-gaap_ExtinguishmentOfDebtAmount_label_en-US" xlink:label="lab_us-gaap_ExtinguishmentOfDebtAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Extinguishment of Debt, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExtinguishmentOfDebtAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ExtinguishmentOfDebtAmount"/>
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    <link:label id="lab_mnk_McKessonCorporationMember_9e2023b7-878d-4491-ab42-d23f39f8e530_terseLabel_en-US" xlink:label="lab_mnk_McKessonCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">McKesson Corporation [Member]</link:label>
    <link:label id="lab_mnk_McKessonCorporationMember_label_en-US" xlink:label="lab_mnk_McKessonCorporationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">McKesson Corporation [Member]</link:label>
    <link:label id="lab_mnk_McKessonCorporationMember_documentation_en-US" xlink:label="lab_mnk_McKessonCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">McKesson Corporation [Member]</link:label>
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    <link:label id="lab_mnk_PaymentToFundProfessionalFeesEscrow_10e8a8c0-8602-431d-9992-c59302495cad_terseLabel_en-US" xlink:label="lab_mnk_PaymentToFundProfessionalFeesEscrow" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment to Fund Professional Fees Escrow</link:label>
    <link:label id="lab_mnk_PaymentToFundProfessionalFeesEscrow_label_en-US" xlink:label="lab_mnk_PaymentToFundProfessionalFeesEscrow" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment to Fund Professional Fees Escrow</link:label>
    <link:label id="lab_mnk_PaymentToFundProfessionalFeesEscrow_documentation_en-US" xlink:label="lab_mnk_PaymentToFundProfessionalFeesEscrow" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment to Fund Professional Fees Escrow</link:label>
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    <link:label id="lab_mnk_ReceivablesFinancingFacilityMember_e5c3dde1-e12c-48a4-8ec5-014736ccc377_terseLabel_en-US" xlink:label="lab_mnk_ReceivablesFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Receivables Financing Facility</link:label>
    <link:label id="lab_mnk_ReceivablesFinancingFacilityMember_label_en-US" xlink:label="lab_mnk_ReceivablesFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Receivables Financing Facility [Member]</link:label>
    <link:label id="lab_mnk_ReceivablesFinancingFacilityMember_documentation_en-US" xlink:label="lab_mnk_ReceivablesFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Receivables Financing Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mnk_ReceivablesFinancingFacilityMember" xlink:href="mnk-20220701.xsd#mnk_ReceivablesFinancingFacilityMember"/>
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    <link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_507c2413-fe19-43b7-a584-ba3bff67873b_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments to reconcile net cash from operating activities:</link:label>
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    <link:label id="lab_srt_ScenarioUnspecifiedDomain_bf5f5db1-2bf0-4382-b4c3-7eac36c1ba83_terseLabel_en-US" xlink:label="lab_srt_ScenarioUnspecifiedDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Scenario [Domain]</link:label>
    <link:label id="lab_srt_ScenarioUnspecifiedDomain_label_en-US" xlink:label="lab_srt_ScenarioUnspecifiedDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Scenario [Domain]</link:label>
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    <link:label id="lab_us-gaap_SubsequentEventTypeAxis_b04dca88-6f84-418a-b50b-78ec7539a47d_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsequent Event Type [Axis]</link:label>
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    <link:label id="lab_us-gaap_CommonStockValueOutstanding_a936702f-22fd-41f3-8fa6-2d075d85ee56_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockValueOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ordinary shares</link:label>
    <link:label id="lab_us-gaap_CommonStockValueOutstanding_label_en-US" xlink:label="lab_us-gaap_CommonStockValueOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common Stock, Value, Outstanding</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockValueOutstanding" xlink:to="lab_us-gaap_CommonStockValueOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ConcentrationRiskByBenchmarkAxis_a64b25e1-ea66-4419-93ea-48fc4924a718_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk Benchmark [Axis]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
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    <link:label id="lab_mnk_CorporateandAllocatedExpenses_d9f75a73-e530-4ce3-8bcc-ed66df54e900_negatedTerseLabel_en-US" xlink:label="lab_mnk_CorporateandAllocatedExpenses" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Corporate and unallocated expenses</link:label>
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    <link:label id="lab_us-gaap_NatureOfExpenseAxis_c3cd29f4-ac6b-4ebe-b9b8-9f55034c1a33_terseLabel_en-US" xlink:label="lab_us-gaap_NatureOfExpenseAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Nature of Expense [Axis]</link:label>
    <link:label id="lab_us-gaap_NatureOfExpenseAxis_label_en-US" xlink:label="lab_us-gaap_NatureOfExpenseAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Nature of Expense [Axis]</link:label>
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    <link:label id="lab_us-gaap_DeferredTaxAssetDomain_87810966-9e5f-4568-adee-d9e4fd653fd5_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred Tax Asset [Domain]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetDomain"/>
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