Epinastine (hydrochloride) (Standard) is the analytical standard of Epinastine (hydrochloride). This product is intended for research and analytical applications. Epinastine hydrochloride (WAL801 hydrochloride) is an antihistamine and mast cell stabilizer. Epinastine hydrochloride is a potent, selective and orally-active histamine H1 receptor antagonist. Epinastine hydrochloride also inhibits IL-8 release and has an antiallergic action^[1][2][3].