Comparative Pharmacology
Head-to-head clinical analysis: CAPTOPRIL AND HYDROCHLOROTHIAZIDE versus HYDRODIURIL.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CAPTOPRIL AND HYDROCHLOROTHIAZIDE versus HYDRODIURIL.
CAPTOPRIL AND HYDROCHLOROTHIAZIDE vs HYDRODIURIL
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Captopril is an angiotensin-converting enzyme (ACE) inhibitor that inhibits the conversion of angiotensin I to angiotensin II, resulting in vasodilation and decreased aldosterone secretion. Hydrochlorothiazide is a thiazide diuretic that inhibits the Na+/Cl- cotransporter in the distal convoluted tubule, increasing excretion of sodium and water.
Inhibits sodium-chloride symporter in the distal convoluted tubule of the kidney, increasing excretion of sodium and water, reducing plasma volume and cardiac output.
1 tablet (captopril 25 mg / hydrochlorothiazide 15 mg) orally once daily, titrated up to a maximum of 1 tablet (captopril 50 mg / hydrochlorothiazide 25 mg) twice daily.
25-100 mg orally once daily. For hypertension: 12.5-25 mg once daily.
None Documented
None Documented
Captopril: ~2 hours (prolonged to 6-8 hours in heart failure or renal impairment). Hydrochlorothiazide: 5.6-14.8 hours (mean ~9.6 hours; prolonged in renal impairment).
Terminal elimination half-life is approximately 5.6–14.8 hours (mean ~10 hours); clinically, duration of diuresis correlates with half-life, allowing once or twice daily dosing.
Captopril: renal (95%), primarily as unchanged drug and disulfide metabolites. Hydrochlorothiazide: renal (≥95%) as unchanged drug via tubular secretion.
Renal: approximately 95% eliminated unchanged in urine via glomerular filtration and tubular secretion; biliary/fecal: <5%.
Category A/B
Category C
Thiazide Diuretic
Thiazide Diuretic