Tipepidine Citrate and its Impurities

Tipepidine Citrate, which inhibits GIRK channel activity, is used clinically as a nonnarcotic antitussive. it is also known as tipepidine hibenzate, is a synthetic, non-opioid antitussive and expectorant of the thiambutene class. Reference standards of Tipepidine Citrate API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.