SPL Set ID: 0c1bd0f4-034e-486c-ae46-2855c8c9ebda

Telmisartan and hydrochlorothiazide tablets, USP are a combination of telmisartan, an orally active angiotensin II antagonist acting on the AT 1 receptor subtype, and hydrochlorothiazide, a thiazide diuretic. Telmisartan, USP a non-peptide molecule, is chemically described as 4'-[(1,4'-dimethyl-2'-propyl[2,6'-bi-1H-benzimidazol]-1'-yl)methyl]-[1,1'-biphenyl]-2-carboxylic acid. Its molecular formula is C 33 H 30 N4O 2 , its molecular weight is 514.62, and its structural formula is: Telmisartan, USP is a white to slightly yellowish crystalline powder. It is sparingly soluble in methylene chloride, slightly soluble in methanol, and practically insoluble in water. It dissolves in 1M sodium hydroxide. Hydrochlorothiazide, USP is a white or practically white crystalline powder with a molecular weight of 297.74. It is freely soluble in sodium hydroxide solution, in n -butyl amine and in dimethyl formamide. It is also very slightly soluble in water, sparingly soluble in methanol, and insoluble in ether, in chloroform and in dilute mineral acids. Hydrochlorothiazide is chemically described as 6-chloro-3,4-dihydro-2 H -1,2,4-benzothiadiazine-7-sulfonamide 1,1-dioxide. Its molecular formula is C 7 H 8 ClN 3 O 4 S 2 , and its structural formula is: Telmisartan and hydrochlorothiazide tablets, USP are formulated for oral administration in three combinations of 40 mg/12.5 mg, 80 mg/12.5 mg, and 80 mg/25 mg telmisartan and hydrochlorothiazide, respectively. The tablets contain the following inactive ingredients: colloidal silicon dioxide, hydroxypropyl cellulose, lactose monohydrate, mannitol, meglumine, povidone K 30, sodium hydroxide, sodium stearyl fumarate. As coloring agents, the 80 mg/12.5 mg tablets contain ferric oxide red, and the 40 mg/12.5 mg and 80 mg/25 mg tablets contain ferric oxide yellow. Telmisartan and hydrochlorothiazide tablets are hygroscopic and require protection from moisture. FDA approved dissolution test specifications differ from USP. structure1 struct2