HistamineImidazolesReceptors, Histamine H1Histamine ReleaseReceptors, Histamine H2Receptors, HistamineHistamine AntagonistsHistamine AgonistsReceptors, Histamine H3Histamine H1 AntagonistsHistamine H2 AntagonistsHistamine N-MethyltransferasePyrilamineMethylhistaminesHistidineMiconazoleHistidine DecarboxylaseDimapritHistamine H3 AntagonistsHistamine AgentsClotrimazoleCimetidineMetiamideChlorpheniramineDiphenhydramineEconazoleMast Cellsp-Methoxy-N-methylphenethylamineBasophilsGuinea PigsHemeImpromidineThioureaHydrogen-Ion ConcentrationAnaphylaxisKetoconazoleKineticsBurimamideDibenzylchlorethamineNylonsGastric FistulaBinding SitesDose-Response Relationship, DrugHistamine H1 Antagonists, Non-SedatingMolecular StructureBronchial Provocation TestsRanitidineHemeproteinsModels, MolecularGastric JuiceMagnetic Resonance SpectroscopyTriprolidineImmunoglobulin EGastric MucosaCromolyn SodiumPruritusAminohydrolasesTerfenadineTetragastrinCatalysisFamotidineAmine Oxidase (Copper-Containing)Crystallography, X-RaySRS-AGastric AcidCetirizineLigandsCopperAntifungal AgentsRNA, Transfer, AspPilocarpusCarnosineMethacholine CompoundsPentagastrinMyoglobinHydrogen BondingNaphazolineUrocanic AcidProtein ConformationKetotifenWhalesBethanechol CompoundsTripelennamineBronchiElectron Spin Resonance SpectroscopyMetalloporphyrinsGuanidinesAnti-Allergic AgentsPyridinesStructure-Activity RelationshipMuscle, SmoothAirway ResistanceProtonsBronchoconstrictionStereoisomerismChemistryTracheaEnzyme InhibitorsChemical PhenomenaEnterochromaffin-like Cells