histamine receptor antagonists

histamine receptor antagonists

H1 receptor antagonist, H2 receptor antagonist Therapeutics A family of agents that counter histamine activity, which are used to treat conditions linked to ↑ histamine release–eg, mast cell disease, basophilic leukemia Adverse effects Antiandrogenic–eg, gynecomastia and impotence. Cf Helicobacter pylori.