SPL Set ID: e04e7c84-59c8-4a1d-8dfc-d72588b97b59

The active ingredient in esomeprazole magnesium delayed-release capsules for oral administration is 1H-Benzimidazole,5-methoxy-2-[(S)-[4-methoxy-3,5-dimethyl-2-pyridinyl)methyl]sulfinyl], magnesium salt (2:1), a PPI. Esomeprazole is the S-isomer of omeprazole, which is a mixture of the S- and R- isomers. (Initial U.S. approval of esomeprazole magnesium: 2001). Its molecular formula is C 34 H 36 MgN 6 O 6 S 2 with molecular weight of 713.12 on an anhydrous basis. The structural formula is: The magnesium salt is an off-white to pale cream colored powder. It is slightly soluble in water. The stability of esomeprazole magnesium is a function of pH; it rapidly degrades in acidic media, but it has acceptable stability under alkaline conditions. At pH 6.8 (buffer), the half-life of the magnesium salt is about 19 hours at 25°C and about 8 hours at 37°C. Esomeprazole magnesium is supplied in delayed-release capsules. Each esomeprazole magnesium delayed-release capsule contains 20 mg of esomeprazole (equivalent to 22.25 mg esomeprazole magnesium) or 40 mg of esomeprazole (equivalent to 44.50 mg esomeprazole magnesium) in the form of enteric-coated pellets with the following inactive ingredients: crospovidone, hydroxypropyl cellulose, mannitol, methacrylic acid-ethyl acrylate copolymer dispersion, sucrose, sugar spheres (corn starch and sucrose), talc, titanium dioxide and triethyl citrate. The capsule shells have the following inactive ingredients: gelatin and titanium dioxide, and may contain sodium lauryl sulfate. The imprinting ink contains black iron oxide, potassium hydroxide, propylene glycol, shellac and strong ammonia solution. Esomeprazole Magnesium Structural Formula