Receptors, Histamine H3Receptors, Histamine H1HistamineReceptors, Histamine H2Histamine H1 AntagonistsHistamine AgonistsHistamine H2 AntagonistsAllergensReceptors, HistamineHistamine AntagonistsHistamine H3 AntagonistsHistamine ReleaseMethylhistaminesChlorpheniramineDimapritCimetidineMetiamideThioureaImpromidineDiphenhydramineHistamine N-MethyltransferaseFamotidineHistamine AgentsRanitidineBurimamidePyrilamineHistidine DecarboxylaseHistamine H1 Antagonists, Non-SedatingDoxepinGuinea PigsPiperidinesImmunoglobulin EIsothiuroniumAntigens, PlantTripelennamineDose-Response Relationship, DrugHypersensitivityp-Methoxy-N-methylphenethylamineMast CellsTerfenadineTriprolidineKetotifenGastric AcidImidazolesRadioligand AssayMitesReceptors, G-Protein-CoupledAnaphylaxisDibenzoxepinsAntigens, DermatophagoidesBasophilsPollenBetahistinePruritusAsthmaSkin TestsCetirizineGuanidinesGastric MucosaHypersensitivity, ImmediateArthropod ProteinsAnti-Allergic AgentsFood HypersensitivityMuscle, SmoothBronchial Provocation TestsRats, WistarDibenzazepinesDesensitization, ImmunologicRhinitis, Allergic, PerennialPyroglyphidaeCockroachesDrug Inverse AgonismNizatidineAstemizoleRhinitis, Allergic, SeasonalDimethindeneBinding, CompetitiveCyproheptadineGastric JuiceRats, Sprague-DawleyPentagastrinCells, CulturedPheniramineCyclic AMPMuscle ContractionPromethazineStomachIndolesTracheaOvalbuminIleumSneezingMethacholine CompoundsBronchiPyridinesRespiratory HypersensitivityHormone AntagonistsDrug InteractionsTime FactorsDogs