Tenofovirdrug info

VIREAD is the brand name for tenofovir disoproxil fumarate (TDF) (a prodrug of tenofovir) which is a fumaric acid salt of bis-isopropoxycarbonyloxymethyl ester derivative of tenofovir. TDF is converted in vivo to tenofovir, an acyclic nucleoside phosphonate (nucleotide) analog of adenosine 5'-monophosphate. Tenofovir exhibits activity against HIV-1 reverse transcriptase. The chemical name of TDF is 9-[( R )-2-[[bis[[(isopropoxycarbonyl)oxy]methoxy]phosphinyl]methoxy]propyl]adenine fumarate (1:1). It has a molecular formula of C 19 H 30 N 5 O 10 P ∙ C 4 H 4 O 4 and a molecular weight of 635.52. It has the following structural formula: Tenofovir disoproxil fumarate is a white to off-white crystalline powder with a solubility of 13.4 mg/mL in distilled water at 25 °C. It has an octanol/phosphate buffer (pH 6.5) partition coefficient (log p) of 1.25 at 25 °C. VIREAD is available as tablets or as an oral powder. VIREAD tablets are for oral administration and are available in the following strengths: 150 mg, 200 mg, 250 mg, and 300 mg of TDF (equivalent to 123 mg, 163 mg, 204 mg, and 245 mg of tenofovir disoproxil, respectively). All strengths of VIREAD tablets contain the following inactive ingredients: croscarmellose sodium, lactose monohydrate, magnesium stearate, microcrystalline cellulose, and pregelatinized starch. The 300 mg strength tablets are coated with Opadry II Y-30-10671-A, which contains FD&C blue #2 aluminum lake, hypromellose 2910, lactose monohydrate, titanium dioxide, and triacetin. The 150 mg, 200 mg, and 250 mg strength tablets are coated with Opadry II 32K-18425, which contains hypromellose 2910, lactose monohydrate, titanium dioxide, and triacetin. VIREAD oral powder is available for oral administration as white, taste-masked, coated granules containing 40 mg of TDF per gram of oral powder (equivalent to 33 mg of tenofovir disoproxil). The oral powder contains the following inactive ingredients: mannitol, hydroxypropyl cellulose, ethylcellulose, and silicon dioxide. In this insert, all dosages are expressed in terms of TDF except where otherwise noted. Chemical Structure