Comparative Pharmacology
Head-to-head clinical analysis: LOSARTAN POTASSIUM AND HYDROCHLOROTHIAZIDE versus TEVETEN HCT.
Peer-Reviewed Evidence
Head-to-head clinical analysis: LOSARTAN POTASSIUM AND HYDROCHLOROTHIAZIDE versus TEVETEN HCT.
LOSARTAN POTASSIUM AND HYDROCHLOROTHIAZIDE vs TEVETEN HCT
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Losartan is an angiotensin II receptor blocker (ARB) that selectively antagonizes AT1 receptors, blocking vasoconstriction and aldosterone secretion. Hydrochlorothiazide is a thiazide diuretic inhibiting sodium and chloride reabsorption in the distal convoluted tubule, reducing plasma volume and peripheral resistance.
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.
Initial: losartan 50 mg/hydrochlorothiazide 12.5 mg orally once daily. Titrate to maximum losartan 100 mg/hydrochlorothiazide 25 mg once daily. Usual maintenance: losartan 50-100 mg/hydrochlorothiazide 12.5-25 mg once daily.
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
Losartan: 2 hours; Active metabolite E-3174: 6-9 hours. Hydrochlorothiazide: 6-15 hours (mean 10 hours) with prolonged elimination in renal impairment.
Eprosartan: 5-9 hours; Hydrochlorothiazide: 6-15 hours; allows once-daily dosing.
Losartan: 35% renal, 60% biliary/fecal; Hydrochlorothiazide: >95% renal (tubular secretion).
Eprosartan: renal (70% unchanged, 10% as metabolite), biliary/fecal (20%); Hydrochlorothiazide: renal (≥95% unchanged).
Category D/X
Category C
ARB
ARB + Thiazide Diuretic Combination