RanitidineHistamine H2 AntagonistsCimetidineBismuthAnti-Ulcer AgentsFamotidineDuodenal UlcerFuransMagnesium HydroxideGastric AcidGastric Acidity DeterminationOmeprazoleSucralfateAntacidsStomach UlcerHeartburnAluminum HydroxideReceptors, Histamine H2Hydrochloric AcidDouble-Blind MethodEnprostilClarithromycinHistamine AntagonistsEsophagitis, PepticMetronidazole2-PyridinylmethylsulfinylbenzimidazolesGastric JuiceHelicobacter pyloriPeptic UlcerAmoxicillinHistamineHelicobacter InfectionsGastric MucosaNizatidineDrug InteractionsPyrilamineLansoprazoleProton Pump InhibitorsHistamine AgonistsDrug Therapy, CombinationReceptors, HistamineChlorpheniramine