diphenylpyraline hydrochloride and its Impurities

Diphenylpyraline Hydrochloride used in the treatment of allergy act by competing with histamine for H 1-receptor sites on effector cells. It is an antihistamine.. Reference standards of Diphenylpyraline Hydrochloride API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below