Pentoxyverine Citrate and its Impurities

Pentoxyverine Citrate (rINN) or carbetapentane is an antitussive (cough suppressant) commonly used for cough associated with illnesses like common cold. It is sold over-the-counter in the United States as Solotuss. Reference standards of Pentoxyverine Citrate API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.