SPL Set ID: acaaab63-c9ff-44c9-8fde-9a4ea6454dd7

Simvastatin is a prodrug of 3-hydoroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitor that is derived synthetically from a fermentation product of Aspergillus terreus . Simvastatin is butanoic acid, 2,2-dimethyl-,1,2,3,7,8,8a-hexahydro-3,7-dimethyl-8-[2-(tetra- hydro-4hydroxy-6-oxo-2H-pyran-2-yl)-ethyl]-1-naphthalenyl ester, [1S-[1α,3α,7β,8β(2S*,4S*),-8aβ]]. The empirical formula of simvastatin is C 25 H 38 O 5 and its molecular weight is 418.57. Its structural formula is: Simvastatin is a white to off-white, nonhygroscopic, crystalline powder that is practically insoluble in water, and freely soluble in chloroform, methanol and ethanol. Simvastatin Tablets, USP for oral use contain 10 mg, 20 mg, 40 mg or 80 mg of simvastatin and the following inactive ingredients: anhydrous citric acid, ascorbic acid, butylated hydroxyanisole, ferric oxide red (iron oxide red), ferric oxide yellow (iron oxide yellow), ferrosoferric oxide (10 mg and 40 mg), hypromellose, lactose monohydrate, magnesium stearate, maltodextrin (10 mg and 80 mg), medium-chain triglycerides (10 mg and 80 mg), microcrystalline cellulose, polydextrose (10 mg and 80 mg), polyethylene glycol (macrogol/peg) (20 mg), pregelatinized starch (maize), (10 mg, 40 mg and 80 mg) and titanium dioxide. FDA approved dissolution test specifications differ from USP. Chemical Structure