SPL Set ID: 6719e877-cff4-4be8-a352-8df0afa4f74c
1 drug(s) with this SPL Set ID
Valacyclovir Tablets, USP is the hydrochloride salt of the L -valyl ester of the antiviral drug acyclovir. Valacyclovir Tablets, USP are for oral administration. Each tablet contains 556.2 mg or 1.112 grams of valacyclovir hydrochloride equivalent to 500 mg or 1 gram of valacyclovir, respectively, and the inactive ingredients anhydrous dibasic calcium phosphate, colloidal silicon dioxide, croscarmellose sodium, FD&C blue #2, hypromellose, magnesium stearate, polyethylene glycol 400, polysorbate 80, povidone K90, and titanium dioxide. The chemical name of valacyclovir hydrochloride is L -valine, 2-[(2-amino-1,6-dihydro-6-oxo-9 H -purin-9-yl)methoxy]ethyl ester, monohydrochloride. It has the following structural formula: Valacyclovir hydrochloride is a white to off-white powder with the molecular formula C 13 H 20 N 6 O 4 ∙HCl and a molecular weight of 360.80. The maximum solubility in water at 25°C is 174 mg/mL. The pkas for valacyclovir hydrochloride are 1.90, 7.47, and 9.43. Chemical Structure