Receptors, Histamine H3Receptors, Histamine H1HistamineReceptors, Histamine H2Histamine H1 AntagonistsHistamine AgonistsHistamine H2 AntagonistsReceptors, HistamineHistamine AntagonistsHistamine H3 AntagonistsHistamine ReleaseMethylhistaminesLigandsChlorpheniramineDimapritCimetidineMetiamideThioureaImpromidineDiphenhydramineFamotidineHistamine N-MethyltransferaseHistamine AgentsPiperidinesRanitidinePyrilamineBurimamideGuinea PigsHistidine DecarboxylaseHistamine H1 Antagonists, Non-SedatingDoxepinDose-Response Relationship, DrugIsothiuroniumRadioligand AssayTripelennamineReceptors, G-Protein-Coupledp-Methoxy-N-methylphenethylamineTerfenadineGastric AcidTriprolidineImidazolesMast CellsHormone AntagonistsBinding, CompetitiveKetotifenRats, Sprague-DawleyRats, WistarDopamine AntagonistsDibenzoxepinsCD40 LigandNeurokinin-1 Receptor AntagonistsExcitatory Amino Acid AntagonistsBetahistinePruritusGuanidinesNarcotic AntagonistsCells, CulturedCetirizineGastric MucosaMuscle, SmoothInterleukin 1 Receptor Antagonist ProteinSignal TransductionMuscarinic AntagonistsFas Ligand ProteinDibenzazepinesAnaphylaxisPyridinesIndolesProtein BindingDrug Inverse AgonismCyclic AMPBinding SitesCHO CellsNizatidineCyproheptadineMolecular Sequence DataAstemizoleDrug InteractionsGABA AntagonistsCricetinaeMuscle ContractionPurinergic P1 Receptor AntagonistsPiperazinesBenzazepinesAmino Acid SequenceBasophilsDimethindeneCell LineKineticsTime FactorsSerotoninIleumAnti-Allergic AgentsGastric JuicePentagastrinNicotinic AntagonistsAdenosine A2 Receptor AntagonistsStomachTracheaMice, Inbred C57BL