Comparative Pharmacology
Head-to-head clinical analysis: HYDROCHLOROTHIAZIDE VALSARTAN versus TEVETEN HCT.
Peer-Reviewed Evidence
Head-to-head clinical analysis: HYDROCHLOROTHIAZIDE VALSARTAN versus TEVETEN HCT.
HYDROCHLOROTHIAZIDE; VALSARTAN vs TEVETEN HCT
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Hydrochlorothiazide is a thiazide diuretic that inhibits the sodium-chloride symporter in the distal convoluted tubule, reducing sodium and water reabsorption. Valsartan is an angiotensin II receptor blocker (ARB) that selectively blocks the binding of angiotensin II to AT1 receptors, causing vasodilation and reduced aldosterone secretion.
TEVETEN HCT combines eprosartan mesylate, an angiotensin II receptor antagonist, and hydrochlorothiazide, a thiazide diuretic. Eprosartan blocks the vasoconstrictor and aldosterone-secreting effects of angiotensin II by selectively antagonizing the AT1 receptor. Hydrochlorothiazide inhibits the sodium-chloride symporter in the distal convoluted tubule, increasing excretion of sodium, chloride, and water, thereby reducing plasma volume.
Oral, 12.5-25 mg hydrochlorothiazide / 80-320 mg valsartan once daily. Maximum dose: 25 mg hydrochlorothiazide / 320 mg valsartan per day.
One tablet orally once daily, containing eprosartan 600 mg and hydrochlorothiazide 12.5 mg or 25 mg, with or without food. Maximum dose: eprosartan 600 mg/hydrochlorothiazide 25 mg per day.
None Documented
None Documented
Hydrochlorothiazide: 6-15 hours (terminal); clinical effect persists due to tubular secretion. Valsartan: 6 hours (terminal); no accumulation with once-daily dosing.
Eprosartan: 5-9 hours; Hydrochlorothiazide: 6-15 hours; allows once-daily dosing.
Hydrochlorothiazide: ~70% renal (unchanged) via tubular secretion; ~30% biliary/fecal. Valsartan: 83% fecal (unchanged); 13% renal (unchanged and metabolites).
Eprosartan: renal (70% unchanged, 10% as metabolite), biliary/fecal (20%); Hydrochlorothiazide: renal (≥95% unchanged).
Category D/X
Category C
ARB
ARB + Thiazide Diuretic Combination