MetiamideThioureaBurimamideGastric JuicePentagastrinHistamine H1 AntagonistsReceptors, Histamine H2HistamineReceptors, HistaminePyrilamineBethanechol CompoundsChlorpheniramineSecretory RateHistamine H2 AntagonistsDiphenhydramineReceptors, Histamine H1StomachAtropinePepsin ADuodenal UlcerHistamine AntagonistsGastric MucosaMethacholine CompoundsStimulation, Chemical