FamotidineRitonavirHistamine H2 AntagonistsLopinavirHIV Protease InhibitorsPyrimidinonesCimetidineRanitidineGastric AcidAnti-Ulcer AgentsSaquinavirGastric Acidity DeterminationIndinavirAnti-HIV AgentsDrug InteractionsStomach UlcerDrug Therapy, CombinationNizatidineTabletsHIV InfectionsOmeprazoleReceptors, Histamine H2Area Under CurveDimapritCarbamatesLansoprazoleNelfinavir2-Pyridinylmethylsulfinylbenzimidazoles