SPL Set ID: 3cd80c04-43a2-4be3-b831-ebccc273a0d2

The active ingredient in esomeprazole magnesium delayed-release capsules for oral administration is bis(5-methoxy-2-[(S)-[(4-methoxy-3,5dimethyl-2-pyridinyl)methyl]sulfinyl]-1 H -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) 2 Mg 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 colored crystalline powder. It contains 3 moles of water of solvation and 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 delayed-release capsules, USP are supplied in delayed-release capsules. Each esomeprazole magnesium delayed-release capsules contains 20 mg of esomeprazole (equivalent to 22.3 mg esomeprazole magnesium trihydrate) or 40 mg of esomeprazole (equivalent to 44.5 mg esomeprazole magnesium trihydrate) in the form of enteric-coated pellets with the following inactive ingredients: hydroxypropyl cellulose, hypromellose, magnesium stearate, methacrylic acid and ethyl acrylate copolymer dispersion, sugar spheres, talc, and triethyl citrate. The capsule shells have the following inactive ingredients: Black iron oxide, FD&C Blue #1, FD&C Red #3, gelatin, potassium hydroxide, propylene glycol, shellac, and titanium dioxide. Meets USP dissolution test 3. structural formula