SPL Set ID: 70cd448a-2921-4c69-bdf2-5a6ce883bd07

Lamotrigine tablets (lamotrigine), 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 is a white to pale cream-colored powder and has a pK a of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Lamotrigine Tablets, USP are supplied for oral administration as 25 mg (Light yellow), 100 mg (Light yellow), 150 mg (Light yellow), and 200 mg (Light blue) tablets. Each tablet contains the labeled amount of lamotrigine and the following inactive ingredients: Lactose monohydrate; Magnesium stearate; Microcrystalline cellulose; Pregelatinized starch (corn); Sodium starch glycolate; Sodium lauryl sulphate; Ferric oxide, yellow; Dual FD&C Blue 01 Lk (200 mg tablet only).