dexbrompheniramine and its Impurities

Dexbrompheniramine is used to treat runny nose, sneezing, itching, and watery eyes caused by allergies, the common cold, or the flu. It is an antihistamine with anticholinergic properties. Reference standards of Dexbrompheniramine API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.