Comparative Pharmacology
Head-to-head clinical analysis: CAPOZIDE 50 15 versus LISINOPRIL AND HYDROCHLOROTHIAZIDE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CAPOZIDE 50 15 versus LISINOPRIL AND HYDROCHLOROTHIAZIDE.
CAPOZIDE 50/15 vs LISINOPRIL AND HYDROCHLOROTHIAZIDE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
CAPOZIDE 50/15 combines captopril (angiotensin-converting enzyme inhibitor) and hydrochlorothiazide (thiazide diuretic). Captopril inhibits ACE, reducing angiotensin II formation, decreasing aldosterone secretion, and lowering blood pressure. Hydrochlorothiazide increases sodium and water excretion by inhibiting the Na+/Cl- cotransporter in distal convoluted tubules.
Lisinopril is an ACE inhibitor that prevents conversion of angiotensin I to angiotensin II, reducing vasoconstriction and aldosterone secretion. Hydrochlorothiazide is a thiazide diuretic that inhibits sodium reabsorption in the distal convoluted tubule, increasing diuresis and lowering blood pressure.
Oral, 1 tablet (captopril 50 mg / hydrochlorothiazide 15 mg) once daily. May increase to 2 tablets daily in divided doses if needed.
Initial dose: 10 mg/12.5 mg orally once daily. Titrate based on blood pressure response; maximum 40 mg/25 mg per day.
None Documented
None Documented
Captopril: terminal half-life ~2 hours (in patients with normal renal function; prolonged in renal impairment to 21-36 hours). Hydrochlorothiazide: half-life 6-15 hours (mean ~9 hours; prolonged in renal impairment). Clinical context: dosing interval affected by renal function.
Lisinopril: terminal half-life 12 hours, effective half-life ~30 hours due to prolonged ACE inhibition. Hydrochlorothiazide: terminal half-life 5.6-14.8 hours (mean 9.6 hours) in patients with normal renal function.
Captopril: renal excretion of unchanged drug and metabolites, primarily in urine (60-75%), with ~20% as unchanged captopril; small amount in feces (5-10%). Hydrochlorothiazide: renal excretion (95% unchanged), <5% via biliary/fecal.
Lisinopril: primarily renal (100% unchanged in urine). Hydrochlorothiazide: renal (≥95% unchanged via tubular secretion).
Category C
Category D/X
ACE Inhibitor and Diuretic Combination
ACE Inhibitor