SPL Set ID: 22225cc4-028e-43ad-8e1f-dcebdc244ecb

Lamotrigine USP, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine’s chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine USP is a white to off white powder and has a pKa of 5.7. Lamotrigine USP is soluble in dimethylformamide, slightly soluble in acetone, in methanol and in acetic acid, very slightly soluble in acetonitrile. The structural formula is: Lamotrigine orally disintegrating tablets, USP are supplied for oral administration. The tablets contain 25 mg (white to off-white), 50 mg (white to off-white), 100 mg (white to off-white), or 200 mg (white to off-white) of lamotrigine, USP and the following inactive ingredients: mannitol, colloidal silicon dioxide, amino methacrylate copolymer, stearic acid, magnesium stearate, microcrystalline cellulose, croscarmellose sodium, crospovidone, peppermint flavor, sucralose. Lamotrigine orally disintegrating tablets, USP are formulated using in-house technologies designed to mask the bitter taste of lamotrigine. The formulation contains flavor and sweetener and has a good mouth feel, no grittiness, no after taste, better palatability and gives a rapid dissolution profile. FDA approved dissolution test specifications differ from USP. structure