Comparative Pharmacology
Head-to-head clinical analysis: PRINZIDE versus UNIVASC.
Peer-Reviewed Evidence
Head-to-head clinical analysis: PRINZIDE versus UNIVASC.
PRINZIDE vs UNIVASC
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
PRINZIDE is a combination of lisinopril (an ACE inhibitor) and hydrochlorothiazide (a thiazide diuretic). Lisinopril inhibits angiotensin-converting enzyme, reducing angiotensin II formation, leading to vasodilation and decreased aldosterone secretion. Hydrochlorothiazide inhibits sodium and chloride reabsorption in the distal convoluted tubule, promoting diuresis and reducing plasma volume.
Angiotensin-converting enzyme (ACE) inhibitor; inhibits conversion of angiotensin I to angiotensin II, reducing vasoconstriction and aldosterone secretion, leading to decreased blood pressure.
Oral, 1-2 tablets daily; each tablet contains 25 mg hydrochlorothiazide and 5 mg lisinopril. Adjust based on blood pressure response; maximum daily dose: 2 tablets.
Initial: 7.5 mg orally once daily; titrate to 15-30 mg once daily. Maximum: 60 mg/day.
None Documented
None Documented
Lisinopril: terminal half-life 12 hours (effective half-life 30 hours due to prolonged ACE binding). Hydrochlorothiazide: terminal half-life 6-15 hours (biphasic, initial phase 2-4 h, terminal phase 6-15 h) with prolonged terminal phase in renal impairment.
The terminal elimination half-life of moexiprilat, the active metabolite, is approximately 9.8 hours in patients with normal renal function. This supports once-daily dosing, though the antihypertensive effect may persist beyond 24 hours with continued therapy.
Lisinopril is excreted unchanged in urine (100% renal elimination); hydrochlorothiazide is excreted 95% renally as unchanged drug and 5% via bile.
Univasc (moexipril) is primarily eliminated via renal excretion (approximately 50% of absorbed dose as unchanged drug and metabolites) and fecal excretion (about 50%).
Category C
Category C
ACE Inhibitor / Diuretic Combination
ACE Inhibitor