lisinopril/hctz - Medication Listings

Lisinopril and hydrochlorothiazide tablets combine 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 C21H31N3O5 • 2H2O and its structural formula is: [picture 1] Lisinopril, USP is a white to off-white, crystalline powder, with a molecular weight of 441.52. 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 C7H8ClN3O4S2 and its structural formula is: [picture 2] Hydrochlorothiazide, USP is a white, or practically white, crystalline powder with a molecular weight of 297.73, 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: 10 mg/12.5 mg Tablets - dibasic calcium phosphate dihydrate, magnesium stearate, mannitol, pregelatinized starch. 20 mg/12.5 mg Tablets - dibasic calcium phosphate dihydrate, magnesium stearate, mannitol, pregelatinized starch, yellow ferric oxide. 20 mg/25 mg Tablets - dibasic calcium phosphate dihydrate, magnesium stearate, mannitol, pregelatinized starch, red ferric oxide.