Receptors, Histamine H3Receptors, Histamine H1HistamineReceptors, Histamine H2Histamine H1 AntagonistsHistamine AgonistsHistamine H2 AntagonistsReceptors, HistamineMast CellsHistamine AntagonistsHistamine H3 AntagonistsHistamine ReleaseMethylhistaminesChlorpheniramineDimapritCimetidineMetiamideThioureaImpromidineDiphenhydramineFamotidineHistamine N-MethyltransferaseHistamine AgentsPyrilamineRanitidineHistidine DecarboxylasePiperidinesBurimamideGuinea PigsHistamine H1 Antagonists, Non-SedatingDoxepinp-Methoxy-N-methylphenethylamineDose-Response Relationship, DrugIsothiuroniumTripelennamineKetotifenRadioligand AssayTerfenadineTriprolidineReceptors, G-Protein-CoupledGastric AcidImidazolesHormone AntagonistsAnaphylaxisCell DegranulationRats, WistarNeurokinin-1 Receptor AntagonistsDibenzoxepinsRats, Sprague-DawleyDopamine AntagonistsPruritusExcitatory Amino Acid AntagonistsBetahistineBasophilsGuanidinesCetirizineGastric MucosaNarcotic AntagonistsMuscle, SmoothBinding, CompetitiveCells, CulturedImmunoglobulin EInterleukin 1 Receptor Antagonist ProteinMuscarinic AntagonistsAnti-Allergic AgentsDibenzazepinesDrug Inverse AgonismCyproheptadineIndolesNizatidinePyridinesAstemizoleCromolyn SodiumMuscle ContractionSerotoninGABA AntagonistsCyclic AMPDrug InteractionsPurinergic P1 Receptor AntagonistsPiperazinesDimethindeneBenzazepinesIleumReceptors, IgESubstance PGastric JuicePentagastrinTracheaStomachTime FactorsNicotinic AntagonistsAdenosine A2 Receptor AntagonistsPromethazinePheniramineLigandsAdrenergic alpha-1 Receptor AntagonistsPurinergic P2 Receptor AntagonistsSignal TransductionDogsBradykinin