venlafaxine besylate monohydrate - Medications

Venlafaxine Extended-Release Tablets contains venlafaxine, an SNRI, present as venlafaxine besylate monohydrate salt. Venlafaxine besylate monohydrate is designated (R/S)-1-[2-(dimethylamino)-1-(4-methoxyphenyl)ethyl] cyclohexanol benzene sulfonate monohydrate or Cyclohexanol, 1-[2-(dimethylamino)-1-(4-methoxyphenyl)ethyl]-, benzenesulfonate, monohydrate and has the molecular formula of C 23 H 33 NO 5 S⸱H 2 O. Its molecular weight is 453.59. The structural formula is shown as follows: Venlafaxine besylate is a white to almost white crystalline powder, with a solubility of about 32 mg/ml in water. Its octanol:water partition coefficient is 0.154. Drug release is controlled by a combination of diffusion through the extended-release coating and erosion of the core tablets. The modified drug release is pH independent. Venlafaxine Extended-Release Tablets are intended for oral administration and contains 183.95 mg of venlafaxine besylate monohydrate equivalent to 112.5 mg of venlafaxine. Inactive ingredients: ammonio methacrylate copolymer, hypromellose, lactose monohydrate, magnesium stearate, microcrystalline cellulose, polyethylene glycol, povidone, silicon dioxide, simethicone, talc, titanium dioxide, and triacetin. The tablet printing ink is composed of ammonium hydroxide, black iron oxide, n-butyl alcohol, isopropyl alcohol, propylene glycol, and shellac.