Clemastine
2-(2-(1-(4-Chlorophenyl)-1-phenylethoxy)ethyl)-1-methylpyrrolidine; Clemastine Fumarate; HS-592; Tavegyl; Tavist; HS 592; HS592
A histamine H1 antagonist used as the hydrogen fumarate in hay fever, rhinitis, allergic skin conditions, and pruritus. It causes drowsiness.