Histamine AntagonistsHistamineDiphenhydramineHistamine H1 AntagonistsReceptors, Histamine H1Histamine H2 AntagonistsPyrilamineTerfenadineCimetidineMetiamidePhenyl EthersHistamine ReleaseReceptors, Histamine H2Receptors, HistamineHistamine AgonistsReceptors, Histamine H3Histamine N-MethyltransferaseHistamine H3 AntagonistsMethylhistaminesDimapritHistidine DecarboxylaseHistamine AgentsChlorpheniramineHormone AntagonistsDose-Response Relationship, DrugNeurokinin-1 Receptor AntagonistsDopamine AntagonistsExcitatory Amino Acid AntagonistsPiperidinesGuinea PigsNarcotic Antagonistsp-Methoxy-N-methylphenethylamineMast CellsInterleukin 1 Receptor Antagonist ProteinMuscarinic AntagonistsRats, Sprague-DawleyGABA AntagonistsThioureaPurinergic P1 Receptor AntagonistsBasophilsImpromidineNicotinic AntagonistsRats, WistarAdenosine A2 Receptor AntagonistsAdrenergic alpha-1 Receptor AntagonistsPurinergic P2 Receptor AntagonistsBurimamideSerotonin 5-HT3 Receptor AntagonistsLeukotriene AntagonistsRanitidineSerotonin 5-HT2 Receptor AntagonistsHistamine H1 Antagonists, Non-SedatingAnaphylaxisSerotoninAdenosine A1 Receptor AntagonistsRadioligand AssayFamotidineCells, CulturedMuscle, SmoothAngiotensin Receptor AntagonistsMuscle ContractionAdrenergic alpha-AntagonistsDrug Interactions