SPL Set ID: 0ef9de1a-b786-4b6c-a250-3f5ac532b16a
1 drug(s) with this SPL Set ID
Metformin Hydrochloride Extended-Release Tablets, USP contains the biguanide antihyperglycemic agent metformin in the form of monohydrochloride salt. The chemical name of metformin hydrochloride is N,N-dimethylimidodicarbonimidic diamide hydrochloride. The structural formula is as shown: Metformin hydrochloride is a white crystalline powder with a molecular formula of C 4 H 11 N 5 •HCl and a molecular weight of 165.62 g/mol. Metformin hydrochloride is freely soluble in water, slightly soluble in alcohol, practically insoluble in acetone and in methylene chloride. The pKa of metformin is 2.8 and 11.5 at 32°C. The pH of a 5% aqueous solution of metformin hydrochloride is 6 to 7. Metformin Hydrochloride Extended-Release Tablets, USP contain 500 mg or 1,000 mg of metformin hydrochloride, which is equivalent to 389.93 mg or 779.86 mg metformin, respectively. Each 500 mg and 1,000 mg tablet contains ammonio methacrylate copolymer dispersion type A, ammonio methacrylate copolymer dispersion type B, hypromellose, magnesium stearate, povidone K 30, talc, titanium dioxide, and triethyl citrate. The tablets are imprinted using a water-soluble black ink which contains shellac, black iron oxide, propylene glycol and ammonium hydroxide. Meets USP Dissolution Test 12. structure.jpg