SPL Set ID: 40e6b627-63dc-4d52-aaa8-750663ad86c2

Lisinopril and hydrochlorothiazide tablets, USP combines an angiotensin converting enzyme inhibitor, lisinopril, and a diuretic, hydrochlorothiazide. Lisinopril, a synthetic peptide derivative, is an oral long-acting angiotensin converting enzyme inhibitor. It is chemically described as (S)-1-[N2-(1-carboxy-3-phenylpropyl)-L-lysyl]-L-proline dihydrate. Its empirical formula is C 21 H 31 N 3 O 5 . 2H 2 O and its structural formula is: Lisinopril, USP is a white to off-white, crystalline powder, with a molecular weight of 441.53. It is soluble in water, sparingly soluble in methanol, and practically insoluble in ethanol. Hydrochlorothiazide is 6-chloro-3,4-dihydro-2H-1,2,4-benzothiadiazine-7-sulfonamide 1,1-dioxide. Its empirical formula is C 7 H 8 ClN 3 O 4 S 2 and its structural formula is: Hydrochlorothiazide, USP is a white, or practically white, crystalline powder with a molecular weight of 297.72, which is slightly soluble in water, but freely soluble in sodium hydroxide solution. Lisinopril and hydrochlorothiazide tablets, USP are available for oral use in three tablet combinations of lisinopril with hydrochlorothiazide: lisinopril and hydrochlorothiazide tablets 10 mg/12.5 mg, containing 10 mg lisinopril and 12.5 mg hydrochlorothiazide, lisinopril and hydrochlorothiazide tablets 20 mg/12.5 mg, containing 20 mg lisinopril and 12.5 mg hydrochlorothiazide and lisinopril and hydrochlorothiazide tablets 20 mg/25 mg, containing 20 mg lisinopril and 25 mg hydrochlorothiazide. Inactive ingredients are dibasic calcium phosphate anhydrous, mannitol, corn starch, pre-gelatinized starch and magnesium stearate. Lisinopril and hydrochlorothiazide tablets USP, 10 mg/12.5 mg and 20 mg/25 mg also contain both yellow iron oxide and red iron oxide. Structural formula 1 Structural formula 2