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11. Description

The active ingredient in Omeprazole Delayed-Release Capsules, USP is a substituted benzimidazole, 5-methoxy-2[[(4-methoxy-3, 5-dimethyl-2-pyridinyl) methyl] sulfinyl]-1H-benzimidazole, a compound that inhibits gastric acid secretion. Its empirical formula is C17H19N3O3S, with a molecular weight of 345.42 g/mol. The structural formula is:

Omeprazole, USP is a white to off-white crystalline powder that melts with decomposition at about 155°C. It is a weak base, freely soluble in ethanol and methanol, and slightly soluble in acetone and isopropanol and very slightly soluble in water. The stability of omeprazole is a function of pH; it is rapidly degraded in acid media, but has acceptable stability under alkaline conditions.

Omeprazole, USP is supplied as delayed-release capsules for oral administration. Each delayed-release capsule contains either 10 mg, 20 mg or 40 mg of omeprazole, USP in the form of enteric-coated granules with the following inactive ingredients: anhydrous lactose, cetyl alcohol, di-sodium hydrogen phosphate dihydrate, hypromellose, hypromellose phthalate, mannitol, simethicone emulsion 30%, sodium lauryl sulfate and sugar sphere.

The capsule shell for Omeprazole Delayed-Release Capsules, USP 10 mg contains D&C Yellow No.10, FD&C Blue No.1, FD&C Red No. 40, FD&C Yellow No. 6, gelatin, sodium lauryl sulfate and titanium dioxide.

The capsule shell for Omeprazole Delayed-Release Capsules, USP 20 mg contains FD&C Blue No.1, gelatin, sodium lauryl sulfate and titanium dioxide.

The capsule shell for Omeprazole Delayed-Release Capsules, USP 40 mg contains D&C Yellow No.10, FD&C Blue No.1, FD&C Red No. 40, FD&C Yellow No. 6, gelatin, sodium lauryl sulfate and titanium dioxide.

The imprinting ink has the following components: black iron oxide, butyl alcohol, dehydrated alcohol, isopropyl alcohol, potassium hydroxide, propylene glycol, strong ammonia solution and shellac.