Diphenidol Hydrochloride and its Impurities

Diphenidol Hydrochloride is a muscarinic antagonist employed as an antiemetic and as an antivertigo agent. This medication controls dizziness and nausea and vomiting. It is used in Meniere's disease, ear surgery and ear disorders. Reference standards of Diphenidol Hydrochloride API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.