Esomeprazole Strontium and its Impurities

Esomeprazole Strontium, sold under the brand name Nexium among others, is a medication which reduces stomach acid. It is used to treat gastroesophageal reflux disease, peptic ulcer disease, and Zollinger–Ellison syndrome. Reference standards of Esomeprazole Strontium API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.