Gastric AcidAntidiarrhealsAnti-Ulcer AgentsHistamine H2 AntagonistsFamotidineOmeprazoleArbaprostilCimetidineAntacidsStomach UlcerRanitidine2-PyridinylmethylsulfinylbenzimidazolesGastric MucosaBethanechol CompoundsProton Pump InhibitorsGastric Acidity DeterminationLansoprazolePentagastrinLoperamideThiorphanIntestinal SecretionsDuodenal Ulcer5,6-DihydroxytryptamineRabeprazoleGastric JuiceCreosoteTetragastrinZollinger-Ellison SyndromeGastrinsDigestive System DiseasesBenzimidazolesHydrochloric AcidHelicobacter pyloriDyspepsiaGastroesophageal RefluxProton PumpsHelicobacter InfectionsBenzodiazepinonesHistaminePylorusPeptic UlcerGastrointestinal AgentsSomatostatinProstaglandins EPirenzepineStomachH(+)-K(+)-Exchanging ATPaseParietal Cells, GastricPeptic Ulcer HemorrhageAcetamidesAnti-Inflammatory Agents, Non-SteroidalHydrogen-Ion ConcentrationDiarrheaJejunumDepression, ChemicalNeuropeptidesCholera ToxinRats, Inbred StrainsIndomethacinDinoprostonePiperidinesIntestinal MucosaNaloxoneThiazolesDogsPhentolamineTheophyllineDose-Response Relationship, DrugAtropineEthanolChloridesDouble-Blind MethodRats, WistarProstaglandinsColonPyridinesCross-Over StudiesEnterotoxinsImidazolesPlant ExtractsDrug Therapy, CombinationAdministration, OralTime FactorsEnzyme InhibitorsRats, Sprague-DawleyTreatment Outcome