Receptors, Histamine H3Receptors, Histamine H1HistamineReceptors, Histamine H2Histamine H1 AntagonistsHistamine AgonistsHistamine H2 AntagonistsReceptors, HistamineHistamine AntagonistsHistamine H3 AntagonistsHistamine ReleaseMethylhistaminesChlorpheniramineDimapritCimetidineMetiamideThioureaImpromidineDiphenhydramineFamotidineHistamine N-MethyltransferaseHistamine AgentsRanitidinePyrilaminePiperidinesBurimamideGuinea PigsHistidine DecarboxylaseHistamine H1 Antagonists, Non-SedatingDoxepinDose-Response Relationship, DrugIsothiuroniumTripelennamineRadioligand Assayp-Methoxy-N-methylphenethylamineTerfenadineTriprolidineGastric AcidReceptors, G-Protein-CoupledMast CellsImidazolesHormone AntagonistsKetotifenDibenzoxepinsRats, WistarWorkNeurokinin-1 Receptor AntagonistsDopamine AntagonistsRats, Sprague-DawleyExcitatory Amino Acid AntagonistsBetahistinePruritusGuanidinesCetirizineNarcotic AntagonistsGastric MucosaBinding, CompetitiveMuscle, SmoothInterleukin 1 Receptor Antagonist ProteinMuscarinic AntagonistsDibenzazepinesAnaphylaxisDrug Inverse AgonismNizatidineCyproheptadineIndolesAstemizoleMuscle ContractionPyridinesGABA AntagonistsDrug InteractionsDimethindeneCyclic AMPPurinergic P1 Receptor AntagonistsBasophilsBenzazepinesCells, CulturedPiperazinesGastric JuiceAnti-Allergic AgentsPentagastrinSerotoninIleumTime FactorsStomachNicotinic AntagonistsAdenosine A2 Receptor AntagonistsTracheaPheniramineLigandsPromethazineAdrenergic alpha-1 Receptor AntagonistsPurinergic P2 Receptor AntagonistsSubstance PGastrinsMethacholine CompoundsBradykininPhenoxypropanolaminesDogsSerotonin 5-HT3 Receptor Antagonists