SPL Set ID: bc37cba9-83c8-4660-a527-cd77fae9ea87

Emtricitabine and tenofovir disoproxil fumarate tablets are fixed-dose combination tablets containing emtricitabine (FTC) and tenofovir disoproxil fumarate (TDF). FTC is a synthetic nucleoside analog of cytidine. TDF is converted in vivo to tenofovir, an acyclic nucleoside phosphonate (nucleotide) analog of adenosine 5′-monophosphate. Both FTC and tenofovir exhibit inhibitory activity against HIV-1 reverse transcriptase. Emtricitabine: The chemical name of FTC is 4-Amino-5-fluoro-1-[(2R,5S)-2-(hydroxy methyl)-1,3-oxathiolan-5- yl]-2(1H)-pyrimidinone. FTC is the (-) enantiomer of a thio analog of cytidine, which differs from other cytidine analogs in that it has a fluorine in the 5-position. It has a molecular formula of C 8 H 10 FN 3 O 3 S and a molecular weight of 247.24. It has the following structural formula: FTC is a white to almost white crystalline powder and freely soluble in methonal and water, practically insoluble in dichloromethane. The partition coefficient (log p) for emtricitabine is −0.43 and the pKa is 2.65. Tenofovir Disoproxil Fumarate: TDF is a fumaric acid salt of the bis-isopropoxycarbonyloxymethyl ester derivative of tenofovir. The chemical name of tenofovir DF 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 powder and Soluble in methanol, slightly soluble in water. The partition coefficient (log p) for tenofovir disoproxil is 1.25 and the pKa is 3.75. Emtricitabine and Tenofovir disoproxil fumarate tablets are for oral administration, and are available in the following strengths: Film-coated tablet containing 200 mg of FTC and 300 mg of TDF (which is equivalent to 245 mg of tenofovir disoproxil) as active ingredients. The tablets also include the following inactive ingredients: croscarmellose sodium, lactose monohydrate, magnesium stearate, microcrystalline cellulose, and pregelatinized starch (gluten free). The tablets are coated with Opadry white Y-1-7000, which contains hypromellose 2910 (5cP), polyethylene glycol 400 (macrogol) & titanium dioxide. Structure Structure