SPL Set ID: 83fa2aab-f00d-4428-b961-d960247d7169

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) 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 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) or 40 mg of esomeprazole (equivalent to 4.5 mg esomeprazole magnesium trihydrate) in the form of entericcoatedgranules with the following inactive ingredients: FD&C Blue #1, gelatin, glyceryl monostearate, hydroxypropyl cellulose, hypromellose, methacrylic acid and ethyl acrylate copolymer, polysorbate 80, sodium bicarbonate, sodium lauryl sulfate, sugar spheres (which contain sucrose and corn starch), talc, titanium dioxide, triethyl citrate, ferrosoferric oxide, potassium hydroxide, propylene glycol and shellac. esomeprazole-structure