SPL Set ID: 1f8f9fe1-b8fd-4f65-8832-9d3d6802d076

Efavirenz, lamivudine and tenofovir disoproxil fumarate tablets contain efavirenz (EFV), an HIV-1 specific, non-nucleoside, reverse transcriptase inhibitor (NNRTI), lamivudine (also known as 3TC), a synthetic nucleoside analogue with activity against HIV-1 and tenofovir disoproxil fumarate (TDF) (a prodrug of tenofovir), 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. Efavirenz, lamivudine and tenofovir disoproxil fumarate tablets are for oral administration. Each film coated tablet contains efavirenz USP 600 mg, lamivudine USP 300 mg and tenofovir disoproxil fumarate 300 mg equivalent to tenofovir disoproxil 245 mg, and the following inactive ingredients: croscarmellose sodium, hydroxypropyl cellulose, lactose anhydrous, magnesium stearate, microcrystalline cellulose, pregelatinized starch, polyethylene glycol, polyvinyl alcohol, sodium lauryl sulfate, talc and titanium dioxide. Efavirenz: The chemical name of efavirenz is ( S )-6-Chloro-4-(cyclopropylethynyl)-1,4-dihydro-4-(trifluoromethyl)-2 H -3,1-benzoxazin-2-one. Its molecular formula is C 14 H 9 ClF 3 NO 2 and its structural formula is: Efavirenz USP is a white to off white powder with a molecular mass of 315.67. It is soluble in methanol and practically insoluble in water (< 10 microgram/mL). Lamivudine: The chemical name of lamivudine is (-)-1-[(2 R ,5 S )-2-(Hydroxymethyl)-1,3-oxathiolan-5-yl]cytosine. Lamivudine is the (-)enantiomer of a dideoxy analogue of cytidine. Lamivudine has also been referred to as (-)2′,3′-dideoxy, 3′-thiacytidine. It has a molecular formula of C 8 H 11 N 3 O 3 S and a molecular weight of 229.26 g per mol. It has the following structural formula: Lamivudine USP is a white or almost white powder and is soluble in water. Tenofovir Disoproxil Fumarate: 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 DF is a white to off white powder freely soluble in dimethyl formamide, soluble in methanol and slightly soluble in water at 25°C. It has a partition coefficient (log p) of 0.75. Efavirenz Chemical Structure Lamivudine Chemical Structure Tenofovir Chemical Structure