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  <xs:element id="cpix_WinHealthInvestmentSingaporeLtdMember" abstract="true" name="WinHealthInvestmentSingaporeLtdMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_CollaborativeArrangementRightsAndObligationsUpfrontPayment" abstract="false" name="CollaborativeArrangementRightsAndObligationsUpfrontPayment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_StockIssuedDuringPeriodShelfRegistrationProceedsFromSaleOfCorporateSecurities" abstract="false" name="StockIssuedDuringPeriodShelfRegistrationProceedsFromSaleOfCorporateSecurities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_KyowaKirinMember" abstract="true" name="KyowaKirinMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_TradeAndNoteReceivablesPolicyTextBlock" abstract="false" name="TradeAndNoteReceivablesPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cpix_CollaborativeArrangementRightsAndObligationsSalesMilestonePaymentsMaximum" abstract="false" name="CollaborativeArrangementRightsAndObligationsSalesMilestonePaymentsMaximum" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_KristaloseMember" abstract="true" name="KristaloseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_OtherProductsMember" abstract="true" name="OtherProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_AssetsAndLiabilitiesLesseeTableTextBlock" abstract="false" name="AssetsAndLiabilitiesLesseeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cpix_BusinessCombinationContingentConsiderationEarnedAndAccruedInOperatingExpenses" abstract="false" name="BusinessCombinationContingentConsiderationEarnedAndAccruedInOperatingExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_NordicGroupBVMember" abstract="true" name="NordicGroupBVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_RediTrexMember" abstract="true" name="RediTrexMember" 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_NinthAmemdmentMember" abstract="true" name="NinthAmemdmentMember" 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_LesseeOperatingLeaseNumberOfRenewalTerms" abstract="false" name="LesseeOperatingLeaseNumberOfRenewalTerms" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cpix_LesseeOperatingLeaseRentIncrease" abstract="false" name="LesseeOperatingLeaseRentIncrease" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cpix_LesseeOperatingLeaseLeasedArea" abstract="false" name="LesseeOperatingLeaseLeasedArea" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:areaItemType"/>
  <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_LesseeOperatingLeaseBaseRent" abstract="false" name="LesseeOperatingLeaseBaseRent" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:monetaryPerAreaItemType"/>
  <xs:element id="cpix_SancusoMember" abstract="true" name="SancusoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_NumeratorAbstract" abstract="true" name="NumeratorAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cpix_SixthAmendmentMember" abstract="true" name="SixthAmendmentMember" 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_AcetadoteMember" abstract="true" name="AcetadoteMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_CollaborativeArrangementRightsAndObligationsRestrictedSharesReceivable" abstract="false" name="CollaborativeArrangementRightsAndObligationsRestrictedSharesReceivable" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="cpix_DenominatorAbstract" abstract="true" name="DenominatorAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <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_LeaseLiability" abstract="false" name="LeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_TieredRoyaltyPaymentsPercentage" abstract="false" name="TieredRoyaltyPaymentsPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cpix_IncentiveStockOptionsMember" abstract="true" name="IncentiveStockOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_VaprisolMember" abstract="true" name="VaprisolMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_ProductsAbstract" abstract="true" name="ProductsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
</xs:schema>
