SulfonesPurinesPiperazinesPhosphodiesterase InhibitorsPhosphodiesterase 5 Inhibitors3',5'-Cyclic-GMP PhosphodiesterasesErectile DysfunctionCyclic Nucleotide Phosphodiesterases, Type 5CommercePenile ErectionHomosexuality, MaleMethamphetamineVasodilator AgentsCyclic GMPGeorgiaTaxesDrug CostsCosts and Cost AnalysisDrugs, GenericUnsafe SexRisk-TakingSexual BehaviorEconomic CompetitionInflation, EconomicFees and ChargesFees, PharmaceuticalDrugs, EssentialInvestmentsModels, EconometricAlcoholic BeveragesRate Setting and ReviewDrug IndustryModels, EconomicCost ControlUnited StatesPrice ListsMarketingPrescription FeesFood SupplyHealth Care SectorNegotiatingFoodCost-Benefit AnalysisBook PricesHealth ExpendituresEconomicsCost SavingsTobacco ProductsTobacco IndustryMarketing of Health ServicesPatents as TopicHospital ChargesConsumer SatisfactionEconomics, BehavioralHealth Care CostsPublic PolicyPrivate SectorEconomics, PharmaceuticalEconomics, HospitalInsurance, Pharmaceutical ServicesIncomeGroup PurchasingEnergy-Generating ResourcesGovernment RegulationHealth PolicyTechnology, High-CostReimbursement MechanismsInsurance, Health, ReimbursementArkansasCopyrightSmokingPublic SectorPharmaciesDrug and Narcotic ControlTime FactorsCost SharingEconomics, MedicalDeveloping CountriesTreatment OutcomeChoice BehaviorFood PreferencesInternationalityOwnershipEquipment and SuppliesUnited States Federal Trade CommissionPharmaceutical PreparationsAnimal HusbandryFood IndustryUnited States Government AgenciesCost AllocationHealth Benefit Plans, EmployeeConsummatory BehaviorPurchasing, HospitalPoliticsFormularies as TopicFinancial ManagementPrescription DrugsLegislation, DrugBudgetsDeveloped Countries