HistamineFeedbackReceptors, Histamine H1Histamine ReleaseReceptors, Histamine H2Receptors, HistamineHistamine AntagonistsHistamine AgonistsHistamine H1 AntagonistsReceptors, Histamine H3Histamine H2 AntagonistsHistamine N-MethyltransferaseFeedback, PhysiologicalPyrilamineMethylhistaminesHistidine DecarboxylaseDimapritHistamine H3 AntagonistsHistamine AgentsCimetidineChlorpheniramineFeedback, PsychologicalAspartate KinaseMetiamideDiphenhydramineFeedback, SensoryMast Cellsp-Methoxy-N-methylphenethylamine2-Isopropylmalate SynthaseHomoserine DehydrogenaseBasophilsAnthranilate Synthase3-Deoxy-7-Phosphoheptulonate SynthaseThioureaImpromidineGuinea PigsPhosphotransferases (Carboxyl Group Acceptor)Serine O-AcetyltransferaseAnaphylaxisKineticsBurimamideEnzyme RepressionDose-Response Relationship, DrugHistamine H1 Antagonists, Non-SedatingIsoleucineBronchial Provocation TestsRanitidineTriprolidineImmunoglobulin EAmidophosphoribosyltransferaseNeural InhibitionCromolyn SodiumPruritusTerfenadineSignal TransductionTime FactorsMutationFamotidineEscherichia coliAmine Oxidase (Copper-Containing)PhenylalanineGastric JuiceGastric MucosaCells, CulturedBrevibacteriumMolecular Sequence DataSRS-AGastric AcidHydro-LyasesCetirizineortho-AminobenzoatesModels, BiologicalThreonine DehydratasePhosphotransferasesAldehyde-LyasesHypobetalipoproteinemia, Familial, Apolipoprotein BMethacholine CompoundsThreonine1-Pyrroline-5-Carboxylate DehydrogenasePentagastrinTryptophanAutoreceptorsOxo-Acid-LyasesKetotifenAmino Acid SequenceTripelennamineBronchiMuscle, SmoothAirway ResistanceAnti-Allergic AgentsAllosteric RegulationBronchoconstrictionSerratia marcescensTracheaRetinal Horizontal CellsRats, Sprague-DawleyATP PhosphoribosyltransferaseEnterochromaffin-like CellsHistidineMethylhistidines