Comparative Pharmacology
Head-to-head clinical analysis: CAPTOPRIL AND HYDROCHLOROTHIAZIDE versus CHLOROTHIAZIDE SODIUM.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CAPTOPRIL AND HYDROCHLOROTHIAZIDE versus CHLOROTHIAZIDE SODIUM.
CAPTOPRIL AND HYDROCHLOROTHIAZIDE vs CHLOROTHIAZIDE SODIUM
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 distal convoluted tubule of nephron, reducing sodium reabsorption and promoting diuresis.
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.
500 mg to 1 g orally or intravenously once or twice 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 45–120 minutes in patients with normal renal function; prolonged in renal impairment (up to 24 hours in anuria).
Captopril: renal (95%), primarily as unchanged drug and disulfide metabolites. Hydrochlorothiazide: renal (≥95%) as unchanged drug via tubular secretion.
Primarily renal excretion via tubular secretion; approximately 95% of absorbed dose excreted unchanged in urine within 24 hours, with less than 5% eliminated via bile/feces.
Category A/B
Category C
Thiazide Diuretic
Thiazide Diuretic