SPL Set ID: dc989aa7-c4ab-4359-a971-523eb477ef9b
1 drug(s) with this SPL Set ID
Venlafaxine hydrochloride extended-release tablets are extended-release tablets for oral administration that contain venlafaxine hydrochloride, a structurally novel antidepressant. Venlafaxine hydrochloride is a selective serotonin and norepinephrine reuptake inhibitor (SNRI). It is designated (R/S)-1-[2-(dimethylamino)-1-(4-methoxyphenyl)ethyl] cyclohexanol hydrochloride or (±)-1-[α-[(dimethylamino)methyl]-p-methoxybenzyl] cyclohexanol hydrochloride and has the molecular formula of C 17 H 27 NO 2 HCl. Its molecular weight is 313.87. The structural formula is shown below. Venlafaxine hydrochloride is a white to off-white crystalline solid with a solubility of 572 mg/mL in water (adjusted to ionic strength of 0.2 M with sodium chloride). Its octanol:water (0.2 M sodium chloride) partition coefficient is 0.43. Venlafaxine hydrochloride extended-release tablets are formulated as an extended-release tablet for once-a-day oral administration. Venlafaxine hydrochloride extended-release tablets use a hydrogel-based technology to deliver venlafaxine hydrochloride at a controlled rate over approximately 24 hours. The system comprises of a bilayer tablet surrounded by a partially permeable coat. The bilayer tablet core consists of one colored swellable layer and a second drug containing layer. On contact of tablet with aqueous medium, the soluble components of the partially permeable membrane dissolve. Imbibition of the aqueous medium by the swellable layer causes it to swell rapidly. This exerts mechanical pressure on the coating causing it to rupture. The coating is removed from the swellable layer side only to expose a pre-defined surface area from which release of the drug occurs. The controlled rate of drug delivery is a function of controlled surface area and the excipients of the drug layer. The biologically inert fragments of the coating may remain intact and may be eliminated in the feces. Each extended-release coated bilayer tablet contains venlafaxine hydrochloride, USP equivalent to 37.5 mg, 75 mg, 150 mg, or 225 mg venlafaxine. Inactive ingredients consist of hypromellose, povidone, lactose monohydrate, methacrylic acid copolymer, talc, magnesium stearate, microcrystalline cellulose, crospovidone, colloidal silicon dioxide, sodium lauryl sulfate, FD & C Red No. 40 Aluminum Lake, ethyl cellulose aqueous dispersion, mannitol, dibutyl sebacate, triethyl citrate, polysorbate 20, polyethylene glycol, polysorbate 80, and polyvinyl alcohol. Imprinting ink contains shellac glaze, isopropyl alcohol, iron oxide black, N-butyl alcohol, propylene glycol and ammonium hydroxide. venlafaxine-str