SPL Set ID: 192c63f0-25ac-410e-ae75-62e96cbf6f9d

The active ingredient in esomeprazole magnesium delayed-release capsules, USP for oral administration is bis(5-methoxy-2-[(S)-[(4-methoxy-3,5-dimethyl-2-pyridinyl)methyl]sulfinyl]-1H-benzimidazole-1-yl) magnesium trihydrate, 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 17 H 18 N 3 O 3 S)2Mg x 3 H 2 O with molecular weight of 767.2 as a trihydrate and 713.1 on an anhydrous basis. The structural formula is: The magnesium salt is a white to slightly cream or slightly yellow colored powder. It contains 3 moles of water of solvation and is slightly soluble in water, soluble in methanol, practically insoluble in heptane. 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 22.3 mg esomeprazole magnesium trihydrate USP) or 40 mg of esomeprazole (equivalent to 44.5 mg esomeprazole magnesium trihydrate USP) in the form of enteric-coated granules with the following inactive ingredients: hydroxypropyl cellulose, hypromellose, magnesium stearate, methacrylic acid and ethyl acrylate copolymer dispersion, mono- and di-glycerides, polysorbate 80, simethicone emulsion, sugar spheres, talc, and triethyl citrate. Capsule shell contains FD&C Blue #1, gelatin, sodium lauryl sulfate, and titanium dioxide. In addition, capsule imprinting ink contains black iron oxide, potassium hydroxide, propylene glycol, shellac and strong ammonia solution. Meets USP Dissolution Test 2.