RanitidineIntestinal AbsorptionGymnemaHibiscusBiological AvailabilityAdministration, OralHistamine H2 AntagonistsAbsorptionDietIntestine, SmallIntestinesCimetidineBismuthAnti-Ulcer AgentsFamotidineDuodenal UlcerFuransMagnesium HydroxideIntestine, LargeGastric Acidity DeterminationGastric AcidOmeprazoleSucralfateAntacidsStomach UlcerHeartburnAluminum HydroxideJejunumIntestinal MucosaReceptors, Histamine H2Double-Blind MethodEnprostilClarithromycinHistamine AntagonistsIleumGastric JuiceMetronidazoleDuodenumEsophagitis, PepticDrug Interactions2-PyridinylmethylsulfinylbenzimidazolesAmoxicillinHistamineHelicobacter pyloriPeptic UlcerHydrogen-Ion ConcentrationSkin AbsorptionHelicobacter InfectionsStomachNizatidineGastric MucosaPyrilamineLansoprazoleProton Pump InhibitorsDrug Therapy, CombinationHistamine AgonistsReceptors, HistamineCross-Over StudiesGastrinsChlorpheniramine