Dose-Response Relationship, DrugTime FactorsDose-Response Relationship, RadiationOxytropisFluoxetineAntidepressive Agents, Second-GenerationSerotonin Uptake InhibitorsSerotoninDrug InteractionsProduct LabelingDrug LabelingNational Institute of Mental Health (U.S.)HIV InfectionsMedication AdherenceAnti-HIV AgentsAnti-Retroviral AgentsContractsHIV Seropositivity