Enzyme inhibitor
This antihistamine (FWfree-base = 240.35 g/mol; CAS 86-21-5; insoluble in water; maleate and p-aminosalicylate salts are water-soluble), also known as N,N-dimethyl-g-phenyl-2-pyridinepropanamide, is more frequently abused than other antihistamines relative to its market share. One of the histamine H1 antagonists with little sedative action, pheniramine is often used in treatment of hay fever, rhinitis, allergic dermatoses, and pruritus. Target(s): H1 histamine receptor; and histamine Nmethyltransferase, mildly inhibited.