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  <xs:element id="cpix_DirectorsIncentivePlan2007Member" abstract="true" name="DirectorsIncentivePlan2007Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_FifthAmendmentMember" abstract="true" name="FifthAmendmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_AccountsReceivableAllowancesByComponentDomain" abstract="true" name="AccountsReceivableAllowancesByComponentDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_RestrictedIncentiveStockOptionsMember" abstract="true" name="RestrictedIncentiveStockOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_OmeclamoxPakMember" abstract="true" name="OmeclamoxPakMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_ScheduleofRentExpenseandSubleaseIncomeTableTextBlock" abstract="false" name="ScheduleofRentExpenseandSubleaseIncomeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cpix_GloriaPharmaceuticalsMember" abstract="true" name="GloriaPharmaceuticalsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_CollaborativeArrangementRightsAndObligationsMilestonePaymentReceivable" abstract="false" name="CollaborativeArrangementRightsAndObligationsMilestonePaymentReceivable" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_LineOfCreditFacilityAdditionalBorrowingCapacity" abstract="false" name="LineOfCreditFacilityAdditionalBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_PaymentProtectionProgramMember" abstract="true" name="PaymentProtectionProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_ProceedsFromSettlementOfPatentLitigation" abstract="false" name="ProceedsFromSettlementOfPatentLitigation" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_EmployeeNonemployeeandFoundationContributionMember" abstract="true" name="EmployeeNonemployeeandFoundationContributionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_CustomerTwoMember" abstract="true" name="CustomerTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_WorkInProcessMember" abstract="true" name="WorkInProcessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_IncreaseDecreaseInProceedsFromLifeInsurancePolicy" abstract="false" name="IncreaseDecreaseInProceedsFromLifeInsurancePolicy" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_BroadwestLeaseFiveYearRenewalOptionMember" abstract="true" name="BroadwestLeaseFiveYearRenewalOptionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_CustomerOneMember" abstract="true" name="CustomerOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_A1600WestEndAvenuePartnersLLCMember" abstract="true" name="A1600WestEndAvenuePartnersLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_SharesRepurchaseAllExceptSettlementOfTaxLiabilitiesRelatedToExerciseOfStockOptionsMember" abstract="true" name="SharesRepurchaseAllExceptSettlementOfTaxLiabilitiesRelatedToExerciseOfStockOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_Customer12And3Member" abstract="true" name="Customer12And3Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_AccruedLiabilitiesInventoryPurchases" abstract="false" name="AccruedLiabilitiesInventoryPurchases" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
