Receptors, HistamineHistamineReceptors, Histamine H1Receptors, Histamine H3Receptors, Histamine H2Histamine AntagonistsHistamine AgonistsHistamine H1 AntagonistsHistamine H2 AntagonistsMethylhistaminesHistamine H3 AntagonistsPyrilamineHistamine ReleaseDimapritHistidine DecarboxylaseCimetidineChlorpheniramineDiphenhydramineImpromidineMetiamideTriprolidineHypothalamic Area, LateralHistamine AgentsHistamine N-MethyltransferaseThioureaTerfenadineRanitidineBurimamideCetirizineAstemizoleHistamine H1 Antagonists, Non-SedatingFamotidinePiperidinesGuinea PigsPromethazineReceptors, G-Protein-CoupledHypothalamus, PosteriorDose-Response Relationship, DrugMast CellsImidazolesAntazolineKetotifenPheniramineDibenzylchlorethaminePruritusMuscle, Smoothp-Methoxy-N-methylphenethylamineSialadenitisRadioligand AssayDoxepinWakefulnessMamillary BodiesRats, Sprague-DawleyAtropineRats, WistarOrexin ReceptorsMethylhistidinesIsothiuroniumNeuronsClemastineMustard CompoundsTripelennamineTracheaCyclic AMPMuscle ContractionDrug InteractionsGastric AcidReceptors, NeuropeptideCells, CulturedIleumBasophilsPyridinesAnaphylaxisHypersensitivityReceptors, DrugGastric MucosaTime FactorsCatsBrainDogsDibenzoxepinsInjections, IntraventricularBetahistineThiazolesHormone AntagonistsRNA, MessengerInositol PhosphatesGuanidinesHypothalamusMicrodialysisNeurokinin-1 Receptor AntagonistsMice, Inbred C57BLGastric JuiceUnconsciousnessSkinDopamine AntagonistsIndomethacinAcetylcholinePentagastrinSleep