Levocetirizine Hydrochloride and its Impurities

A non-sedative antihistamine that belongs to third generation, Levocetirizine is active enantiomer of cetirizine. It is an inverse agonist that decreases activity at histamine H1 receptors. It is more effective than cetirizine with fewer side effects Reference standards of Levocetirizine Hydrochloride API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.