RanitidineGymnemaIntestinal AbsorptionCimetidineHibiscusBiological AvailabilityAdministration, OralHistamine H2 AntagonistsAbsorptionDietFamotidineAnti-Ulcer AgentsBismuthDuodenal UlcerMagnesium HydroxideGastric AcidGuanidinesFuransGastric Acidity DeterminationOmeprazoleReceptors, Histamine H2SucralfateAntacidsStomach UlcerAluminum HydroxideHistamineDimapritReceptors, HistamineHistamine AntagonistsPyrilamineDrug InteractionsHeartburnGastric JuiceHistamine H1 AntagonistsDouble-Blind MethodHistamine AgonistsPeptic UlcerEsophagitis, PepticReceptors, Histamine H1ChlorpheniramineGastric MucosaNizatidineDiphenhydramineImpromidineHydrogen-Ion ConcentrationOrganic Cation Transport ProteinsEnprostilClarithromycinGastrinsSimethiconePentagastrinMetronidazoleDrug Therapy, CombinationStomach2-PyridinylmethylsulfinylbenzimidazolesRandom AllocationHalf-LifeMethylhistaminesCross-Over StudiesAmoxicillinPeptic Ulcer HemorrhageHelicobacter pyloriClinical Trials as TopicSkin AbsorptionSulfoxidesDose-Response Relationship, DrugHelicobacter InfectionsLansoprazoleProton Pump InhibitorsTime FactorsBethanechol CompoundsJejunumPneumonia, AspirationDuodenum