Histamine ReleaseHistamineReceptors, Histamine H3Receptors, Histamine H1Receptors, Histamine H2Histamine H1 AntagonistsHistamine AgonistsHistamine H2 AntagonistsAllergensReceptors, HistamineHistamine AntagonistsMast CellsHistamine H3 AntagonistsBasophilsp-Methoxy-N-methylphenethylamineImmunoglobulin EMethylhistaminesChlorpheniramineDimapritCimetidineMetiamideThioureaImpromidineDiphenhydramineHistamine N-MethyltransferaseFamotidineHistamine AgentsRanitidinePyrilamineBurimamideHistidine DecarboxylaseHistamine H1 Antagonists, Non-SedatingGuinea PigsDoxepinPiperidinesIsothiuroniumDose-Response Relationship, DrugAntigens, PlantTripelennamineHypersensitivityTerfenadineKetotifenTriprolidineImidazolesGastric AcidRadioligand AssayReceptors, G-Protein-CoupledMitesAnaphylaxisDibenzoxepinsAntigens, DermatophagoidesPollenBetahistinePruritusSkin TestsAsthmaGuanidinesCetirizineRats, WistarGastric MucosaHypersensitivity, ImmediateAnti-Allergic AgentsMuscle, SmoothArthropod ProteinsFood HypersensitivityRats, Sprague-DawleyBronchial Provocation TestsDesensitization, ImmunologicDibenzazepinesCells, CulturedRhinitis, Allergic, PerennialPyroglyphidaeCockroachesDrug Inverse AgonismNizatidineBinding, CompetitiveRhinitis, Allergic, SeasonalAstemizoleDimethindeneCyproheptadineGastric JuiceMuscle ContractionCyclic AMPPentagastrinCalciumTime FactorsTracheaPheniramineStomachIleumPromethazineSerotoninBronchiOvalbuminDrug InteractionsDogsMethacholine CompoundsPyridinesSneezingIndoles