HistamineReceptors, Histamine H1Receptors, Histamine H3Receptors, Histamine H2Histamine H1 AntagonistsHistamine AgonistsReceptors, HistamineHistamine AntagonistsHistamine H2 AntagonistsHistamine ReleaseHistamine H3 AntagonistsMethylhistaminesChlorpheniramineDimapritCimetidineHistamine N-MethyltransferaseMetiamidePyrilamineHistamine AgentsThioureaHistidine DecarboxylaseDiphenhydramineImpromidineFamotidineGuinea PigsRanitidineBurimamideHistamine H1 Antagonists, Non-SedatingPiperidinesp-Methoxy-N-methylphenethylamineDoxepinDose-Response Relationship, DrugMast CellsIsothiuroniumTripelennamineTriprolidineTerfenadineGastric AcidRadioligand AssayKetotifenBasophilsReceptors, G-Protein-CoupledImidazolesAnaphylaxisPruritusCetirizineGastric MucosaDibenzoxepinsMuscle, SmoothBetahistineRats, WistarHormone AntagonistsGuanidinesRats, Sprague-DawleyNeurokinin-1 Receptor AntagonistsGastric JuiceDopamine AntagonistsPentagastrinAnti-Allergic AgentsMuscle ContractionExcitatory Amino Acid AntagonistsAstemizoleCyproheptadineBinding, CompetitiveSerotoninTracheaMethacholine CompoundsCyclic AMPNarcotic AntagonistsDibenzazepinesBronchial Provocation TestsStomachMuscarinic AntagonistsCells, CulturedDrug InteractionsIleumInterleukin 1 Receptor Antagonist ProteinDrug Inverse AgonismPyridinesGastrinsIndolesDimethindeneImmunoglobulin ENizatidineCromolyn SodiumBradykininBronchiSRS-APheniraminePromethazineStimulation, ChemicalAtropinePiperazinesTime FactorsSneezingBenzazepinesGABA AntagonistsSubstance PDogsPurinergic P1 Receptor Antagonists