SPL Set ID: d3faac3a-5c8c-4987-9703-c161fb29ec56
1 drug(s) with this SPL Set ID
The active ingredient in famciclovir tablets, USP is famciclovir, USP an orally administered prodrug of the antiviral agent penciclovir. Chemically, famciclovir,USP is known as 2-[2-(2-amino-9 H -purin-9-yl)ethyl]-1,3-propanediol diacetate. Its molecular formula is C 14 H 19 N 5 O 4 ; its molecular weight is 321.3. It is a synthetic acyclic guanine derivative and has the following structure: Famciclovir, USP is a white to pale yellow solid. It is freely soluble in acetone and methanol, and sparingly soluble in ethanol and isopropanol. At 25°C famciclovir, USP is freely soluble (greater than 25% w/v) in water initially, but rapidly precipitates as the sparingly soluble (2% to 3% w/v) monohydrate. Famciclovir, USP is not hygroscopic below 85% relative humidity. Partition coefficients are: octanol/water (pH 4.8) P=1.09 and octanol/phosphate buffer (pH 7.4) P=2.08. Famciclovir tablets,USP contain 125 mg, 250 mg, or 500 mg of famciclovir, USP together with the following inactive ingredients: hydroxypropyl cellulose, hypromellose, anhydrous lactose, magnesium stearate, polyethylene glycols, sodium starch glycolate and titanium dioxide. Meets USP Dissolution Test 2.