PyrilamineReceptors, Histamine H1HistamineReceptors, Histamine H3Histamine H1 AntagonistsReceptors, Histamine H2Histamine AgonistsHistamine AntagonistsReceptors, HistamineHistamine H2 AntagonistsHistamine H3 AntagonistsMethylhistaminesDimapritDiphenhydramineCimetidineHistamine ReleaseImpromidineDoxepinChlorpheniramineGuinea PigsMetiamideThioureaDose-Response Relationship, DrugFamotidineHistamine N-MethyltransferaseHistamine AgentsRanitidineOrganic Cation Transport ProteinsPiperidinesBurimamideHistidine DecarboxylaseHistamine H1 Antagonists, Non-SedatingMuscle, SmoothIsothiuroniumTripelennamineRadioligand Assayp-Methoxy-N-methylphenethylamineTerfenadineTriprolidineGastric AcidReceptors, G-Protein-CoupledMast CellsImidazolesHormone AntagonistsKetotifenDibenzoxepinsNeurokinin-1 Receptor AntagonistsDopamine AntagonistsRats, WistarRats, Sprague-DawleyExcitatory Amino Acid AntagonistsBetahistinePruritusGuanidinesCetirizineNarcotic AntagonistsGastric MucosaBinding, CompetitiveInterleukin 1 Receptor Antagonist ProteinMuscarinic Antagonists