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-CoupledDibenzoxepinsAnaphylaxisAntigens, DermatophagoidesBasophilsPollenBetahistinePruritusSkin TestsAsthmaCetirizineGuanidinesGastric MucosaHypersensitivity, ImmediateArthropod ProteinsAnti-Allergic AgentsFood HypersensitivityMuscle, SmoothBronchial Provocation TestsDibenzazepinesDesensitization, ImmunologicRats, WistarRhinitis, Allergic, PerennialPyroglyphidaeDrug Inverse AgonismCockroachesNizatidineAstemizoleRhinitis, Allergic, SeasonalDimethindeneBinding, CompetitiveCyproheptadineGastric JuicePentagastrinRats, Sprague-DawleyPheniraminePromethazineMuscle ContractionCyclic AMPStomachTracheaOvalbuminIndolesSneezingMethacholine CompoundsIleumBronchiRespiratory HypersensitivityCells, CulturedPyridinesHormone AntagonistsGastrinsDrug InteractionsPhenoxypropanolamines