HistamineReceptors, Histamine H3Receptors, Histamine H1Receptors, Histamine H2Histamine H1 AntagonistsHistamine AgonistsHistamine H2 AntagonistsReceptors, HistamineHistamine AntagonistsHistamine H3 AntagonistsHistamine ReleaseMethylhistaminesChlorpheniramineDimapritCimetidineMetiamideThioureaImpromidineDiphenhydraminePiperidinesFamotidineGuinea PigsDose-Response Relationship, DrugHistamine N-MethyltransferaseHistamine AgentsPyrilamineRanitidineBurimamideHistidine DecarboxylaseHistamine H1 Antagonists, Non-SedatingDoxepinRadioligand AssayIsothiuroniumDopamine AgonistsReceptors, G-Protein-CoupledRats, Sprague-DawleyTripelennamineImidazolesRats, Wistarp-Methoxy-N-methylphenethylamineGastric AcidTerfenadineTriprolidineHormone AntagonistsDopamine AntagonistsMast CellsNarcotic AntagonistsKetotifenBinding, CompetitiveExcitatory Amino Acid AntagonistsNeurokinin-1 Receptor AntagonistsMuscle, SmoothDibenzoxepinsCyclic AMPGABA AgonistsMuscarinic AntagonistsPruritusBetahistineDrug Inverse AgonismCells, CulturedPurinergic P1 Receptor AgonistsPyridinesGuanidinesLigandsDrug InteractionsBenzazepinesIndolesMuscle ContractionCetirizineGastric MucosaPiperazinesSerotoninPurinergic P1 Receptor AntagonistsGABA AntagonistsInterleukin 1 Receptor Antagonist ProteinMuscarinic AgonistsDibenzazepinesAnaphylaxisCHO CellsCricetinaeCarbacholNicotinic AgonistsIleumCyproheptadineSignal TransductionPyrrolidinesTime FactorsNicotinic AntagonistsAdrenergic AgonistsNizatidineTracheaCalciumAstemizoleSubstance PAdenosine A2 Receptor AntagonistsNorepinephrineAdrenergic beta-AgonistsPurinergic P2 Receptor AntagonistsAdenosineAdrenergic alpha-Agonists