CimetidineHistamine H2 AntagonistsGuanidinesRanitidineFamotidineDuodenal UlcerReceptors, Histamine H2DimapritHistamineGastric AcidReceptors, HistaminePyrilamineAnti-Ulcer AgentsMagnesium HydroxideStomach UlcerHistamine H1 AntagonistsDiphenhydramineHistamine AntagonistsDrug InteractionsAntacidsReceptors, Histamine H1Organic Cation Transport ProteinsHistamine AgonistsImpromidineAluminum HydroxideGastric Acidity DeterminationGastric JuiceChlorpheniramineMetiamidePentagastrinFurans