RanitidineTabletsHistamine H2 AntagonistsCimetidineBismuthAnti-Ulcer AgentsFamotidineDuodenal UlcerFuransMagnesium HydroxideGastric Acidity DeterminationOmeprazoleGastric AcidSucralfateTablets, Enteric-CoatedAntacidsStomach UlcerHeartburnAluminum HydroxideReceptors, Histamine H2Double-Blind MethodClarithromycinEnprostilChemistry, Pharmaceutical2-PyridinylmethylsulfinylbenzimidazolesHistamine AntagonistsMetronidazoleEsophagitis, PepticGastric JuiceHelicobacter pyloriAmoxicillinPeptic UlcerLansoprazoleHistamineHelicobacter InfectionsBiological AvailabilityNizatidineExcipientsDrug InteractionsDrug Therapy, CombinationProton Pump InhibitorsPyrilamineHistamine AgonistsGastric MucosaReceptors, HistamineDrug CompoundingChlorpheniramine