HistamineReceptors, Histamine H1Receptors, Histamine H3Receptors, Histamine H2Histamine H1 AntagonistsHistamine AgonistsReceptors, HistamineHistamine AntagonistsHistamine H2 AntagonistsAllergensHistamine H3 AntagonistsHistamine ReleaseMethylhistaminesChlorpheniramineDimapritCimetidineMetiamideHistamine N-MethyltransferaseThioureaPyrilamineDiphenhydramineHistamine AgentsImpromidineHistidine DecarboxylaseFamotidineRanitidineBurimamideHistamine H1 Antagonists, Non-SedatingGuinea PigsDoxepinImmunoglobulin EPiperidinesIsothiuroniump-Methoxy-N-methylphenethylamineMast CellsTripelennamineDose-Response Relationship, DrugAntigens, PlantTerfenadineTriprolidineHypersensitivityKetotifenGastric AcidBasophilsAnaphylaxisImidazolesRadioligand AssayReceptors, G-Protein-CoupledPruritusMitesDibenzoxepinsCetirizineBetahistineGastric MucosaAntigens, DermatophagoidesAsthmaBronchial Provocation TestsPollenSkin TestsAnti-Allergic AgentsGuanidinesHypersensitivity, ImmediateMuscle, SmoothFood HypersensitivityGastric JuiceArthropod ProteinsRats, WistarAstemizoleDesensitization, ImmunologicDibenzazepinesPentagastrinRhinitis, Allergic, PerennialCyproheptadineRhinitis, Allergic, SeasonalDimethindeneDrug Inverse AgonismNizatidineMethacholine CompoundsBinding, CompetitiveTracheaPyroglyphidaeCockroachesMuscle ContractionBronchiStomachCyclic AMPPheniramineRats, Sprague-DawleyPromethazineIleumSneezingGastrinsCromolyn SodiumCells, CulturedOvalbuminSerotoninIndolesDogsDrug InteractionsPyridines