SPL Set ID: 2d599ccf-8e63-4ff1-aa52-4809744ea97a

Temozolomide is an alkylating drug. The chemical name of temozolomide is 3,4-dihydro-3-methyl-4-oxoimidazo[5,1d]- as -tetrazine-8-carboxamide. The structural formula of temozolomide is: The material is a white to light tan or light pink powder with a molecular formula of C 6 H 6 N 6 O 2 and a molecular weight of 194.15. The molecule is stable at acidic pH (<5) and labile at pH >7; hence temozolomide can be administered orally. The prodrug, temozolomide, is rapidly hydrolyzed to the active 5-(3-methyltriazen-1-yl) imidazole-4-carboxamide (MTIC) at neutral and alkaline pH values, with hydrolysis taking place even faster at alkaline pH. Chemical Structure Temozolomide capsules, USP Temozolomide capsules, USP for oral use contains either 5 mg, 20 mg, 100 mg, 140 mg, 180 mg, or 250 mg of temozolomide. The inactive ingredients are as follows: Temozolomide capsules 5 mg: lactose anhydrous (168 mg), colloidal anhydrous silica (1 mg), sodium starch glycolate (16 mg), tartaric acid (7 mg), and stearic acid (3 mg). Temozolomide capsules 20 mg: lactose anhydrous (14.6 mg), colloidal anhydrous silica (0.2 mg), sodium starch glycolate (3.2 mg), tartaric acid (1.4 mg), and stearic acid (0.6 mg). Temozolomide capsules 100 mg: lactose anhydrous (73 mg), colloidal anhydrous silica (1 mg), sodium starch glycolate (16 mg), tartaric acid (7 mg), and stearic acid (3 mg). Temozolomide capsules 140 mg: lactose anhydrous (102.2 mg), colloidal anhydrous silica (1.4 mg), sodium starch glycolate (22.4 mg), tartaric acid (9.8 mg), and stearic acid (4.2 mg). Temozolomide capsules 180 mg: lactose anhydrous (131.4 mg), colloidal anhydrous silica (1.8 mg), sodium starch glycolate (28.8 mg), tartaric acid (12.6 mg), and stearic acid (5.4 mg). Temozolomide capsules 250 mg: lactose anhydrous (182.5 mg), colloidal anhydrous silica (2.5 mg), sodium starch glycolate (40 mg), tartaric acid (17.5 mg), and stearic acid (7.5 mg). The body of the capsules is made of gelatin, and is white. The body of 250 mg capsule contain additionally sodium lauryl sulfate. The cap is also made of gelatin, and the colors vary based on the dosage strength. The capsule body and cap are imprinted with pharmaceutical branding ink, which contains black iron oxide, potassium hydroxide and shellac. Temozolomide capsules 5 mg: The green cap contains gelatin, titanium dioxide, iron oxide yellow and FD&C Blue 2. Temozolomide capsules 20 mg: The yellow cap contains gelatin, titanium dioxide and iron oxide yellow. Temozolomide capsules 100 mg: The pink cap contains gelatin, titanium dioxide and iron oxide red. Temozolomide capsules 140 mg: The transparent blue cap contains gelatin and FD&C Blue 2. Temozolomide capsules 180 mg: The maroon cap contains gelatin, iron oxide red, iron oxide yellow and titanium dioxide. Temozolomide capsules 250 mg: The white cap contains gelatin, titanium dioxide and sodium lauryl sulfate.