HistamineReceptors, Histamine H1Receptors, Histamine H3Receptors, Histamine H2Histamine H1 AntagonistsHistamine AgonistsReceptors, HistamineHistamine AntagonistsHistamine H2 AntagonistsHistamine ReleaseHistamine H3 AntagonistsMethylhistaminesDimapritChlorpheniramineCimetidineHistamine N-MethyltransferaseMetiamidePyrilamineThioureaHistamine AgentsHistidine DecarboxylaseDiphenhydramineImpromidineGuinea PigsFamotidineRanitidineBurimamidePiperidinesHistamine H1 Antagonists, Non-SedatingDose-Response Relationship, Drugp-Methoxy-N-methylphenethylamineMast CellsDoxepinIsothiuroniumTripelennamineTriprolidineTerfenadineGastric AcidBasophilsRadioligand AssayKetotifenImidazolesReceptors, G-Protein-CoupledAnaphylaxisRats, Sprague-DawleyRats, WistarPruritusCells, CulturedGastric MucosaMuscle, SmoothCetirizineDibenzoxepinsHormone AntagonistsBetahistineGuanidinesSerotoninMuscle ContractionCalciumDopamine AntagonistsNeurokinin-1 Receptor AntagonistsExcitatory Amino Acid AntagonistsGastric JuiceTime FactorsCyclic AMPAnti-Allergic AgentsPentagastrinBinding, CompetitiveTracheaDrug InteractionsCyproheptadineMuscarinic AntagonistsAstemizoleNarcotic AntagonistsMethacholine CompoundsBradykininStomachNorepinephrineIleumPyridinesStimulation, ChemicalImmunoglobulin EGastrinsAcetylcholineDibenzazepinesBronchial Provocation TestsSRS-AInterleukin 1 Receptor Antagonist ProteinCromolyn SodiumAtropineSubstance PKineticsDogsDrug Inverse AgonismBronchiIndolesDimethindeneRats, Inbred StrainsNizatidineGABA AntagonistsElectric Stimulation