清洁验证英文版.docx

清洁验证英文版.docx

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清洁验证英文版

ValidationofCleaningProcesses（7/93）

GUIDETOINSPECTIONSVALIDATIONOFCLEANINGPROCESSES

Note:

ThisdocumentisreferencematerialforinvestigatorsandotherFDApersonnel.ThedocumentdoesnotbindFDA,anddoesnoconferanyrights,privileges,benefits,orimmunitiesfororonanyperson（s）.

I.INTRODUCTION

Validationofcleaningprocedureshasgeneratedconsiderablediscussionsinceagencydocuments,includingtheInspectionGuideforBulkPharmaceuticalChemicalsandtheBiotechnologyInspectionGuide,havebrieflyaddressedthisissue.TheseAgencydocumentsclearlyestablishtheexpectationthatcleaningprocedures（processes）bevalidated.

Thisguideisdesignedtoestablishinspectionconsistencyanduniformitybydiscussingpracticesthathavebeenfoundacceptable（orunacceptable）.Simultaneously,onemustrecognizethatforcleaningvalidation,aswithvalidationofotherprocesses,theremaybemorethanonewaytovalidateaprocess.Intheend,thetestofanyvalidationprocessiswhetherscientificdatashowsthatthesystemconsistentlydoesasexpectedandproducesaresultthatconsistentlymeetspredeterminedspecifications.

Thisguideisintendedtocoverequipmentcleaningforchemicalresiduesonly.

II.BACKGROUND

ForFDAtorequirethatequipmentbecleanpriortouseisnothingnew,the1963GMPRegulations（Part133.4）statedasfollows"Equipment***shallbemaintainedinacleanandorderlymanner***."Averysimilarsectiononequipmentcleaning（211.67）wasincludedinthe1978CGMPregulations.Ofcourse,themainrationaleforrequiringcleanequipmentistopreventcontaminationoradulterationofdrugproducts.Historically,FDAinvestigatorshavelookedforgrossinsanitationduetoinadequatecleaningandmaintenanceofequipmentand/orpoordustcontrolsystems.Also,historicallyspeaking,FDAwasmoreconcernedaboutthecontaminationofnonpenicillindrugproductswithpenicillinsorthecross-contaminationofdrugproductswithpotentsteroidsorhormones.Anumberofproductshavebeenrecalledoverthepastdecadeduetoactualorpotentialpenicillincross-contamination.

OneeventwhichincreasedFDAawarenessofthepotentialforcrosscontaminationduetoinadequateprocedureswasthe1988recallofafinisheddrugproduct,CholestyramineResinUSP.Thebulkpharmaceuticalchemicalusedtoproducetheproducthadbecomecontaminatedwithlowlevelsofintermediatesanddegradantsfromtheproductionofagriculturalpesticides.Thecross-contaminationinthatcaseisbelievedtohavebeenduetothereuseofrecoveredsolvents.Therecoveredsolventshadbeencontaminatedbecauseofalackofcontroloverthereuseofsolventdrums.Drumsthathadbeenusedtostorerecoveredsolventsfromapesticideproductionprocesswerelaterusedtostorerecoveredsolventsusedfortheresinmanufacturingprocess.Thefirmdidnothaveadequatecontrolsoverthesesolventdrums,didnotdoadequatetestingofdrummedsolvents,anddidnothavevalidatedcleaningproceduresforthedrums.

Someshipmentsofthispesticidecontaminatedbulkpharmaceuticalweresuppliedtoasecondfacilityatadifferentlocationforfinishing.Thisresultedinthecontaminationofthebagsusedinthatfacility'sfluidbeddryerswithpesticidecontamination.Thisinturnledtocrosscontaminationoflotsproducedatthatsite,asitewherenopesticideswerenormallyproduced.

FDAinstitutedanimportalertin1992onaforeignbulkpharmaceuticalmanufacturerwhichmanufacturedpotentsteroidproductsaswellasnon-steroidalproductsusingcommonequipment.Thisfirmwasamulti-usebulkpharmaceuticalfacility.FDAconsideredthepotentialforcross-contaminationtobesignificantandtoposeaserioushealthrisktothepublic.ThefirmhadonlyrecentlystartedacleaningvalidationprogramatthetimeoftheinspectionanditwasconsideredinadequatebyFDA.Oneofthereasonsitwasconsideredinadequatewasthatthefirmwasonlylookingforevidenceoftheabsenceofthepreviouscompound.Thefirmhadevidence,fromTLCtestsontherinsewater,ofthepresenceofresiduesofreactionbyproductsanddegradantsfromthepreviousprocess.

III.GENERALREQUIREMENTS

FDAexpectsfirmstohavewrittenprocedures（SOP's）detailingthecleaningprocessesusedforvariouspiecesofequipment.Iffirmshaveonecleaningprocessforcleaningbetweendifferentbatchesofthesameproductanduseadifferentprocessforcleaningbetweenproductchanges,weexpectthewrittenprocedurestoaddressthesedifferentscenario.Similarly,iffirmshaveoneprocessforremovingwatersolubleresiduesandanotherprocessfornon-watersolubleresidues,thewrittenprocedureshouldaddressbothscenariosandmakeitclearwhenagivenprocedureistobefollowed.Bulkpharmaceuticalfirmsmaydecidetodedicatecertainequipmentfor