Comparative Pharmacology
Head-to-head clinical analysis: AMTURNIDE versus TIMOLIDE 10 25.
Peer-Reviewed Evidence
Head-to-head clinical analysis: AMTURNIDE versus TIMOLIDE 10 25.
AMTURNIDE vs TIMOLIDE 10-25
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
AMTURNIDE is a combination of amiloride, a potassium-sparing diuretic that inhibits sodium reabsorption in the distal convoluted tubule and collecting duct, and hydrochlorothiazide, a thiazide diuretic that inhibits sodium chloride reabsorption in the distal convoluted tubule. The combination produces additive diuretic and antihypertensive effects with reduced potassium loss.
Timolol is a non-selective beta-adrenergic receptor antagonist that blocks beta-1 and beta-2 receptors, reducing heart rate, myocardial contractility, and blood pressure. Hydrochlorothiazide is a thiazide diuretic that inhibits the sodium-chloride symporter in the distal convoluted tubule, increasing excretion of sodium and water, reducing plasma volume and blood pressure.
10 mg to 20 mg orally once daily, with or without food.
One tablet (timolol 10 mg / hydrochlorothiazide 25 mg) orally once daily. May be increased to two tablets once daily if needed.
None Documented
None Documented
Terminal elimination half-life is 12 hours (range 10–14 hours); steady-state achieved within 2–3 days.
The terminal elimination half-life of timolol is approximately 4 hours in patients with normal renal function, but may be prolonged to 12-20 hours in patients with renal impairment or hepatic dysfunction. The half-life of hydrochlorothiazide is 6-15 hours.
Primarily renal excretion as unchanged drug (70%) and glucuronide conjugate (15%); biliary/fecal elimination accounts for 10%.
Timolol is primarily eliminated by renal excretion of unchanged drug and metabolites. Approximately 20% of a dose is excreted unchanged in urine, with the remainder as metabolites (mostly inactive). Fecal elimination accounts for less than 5%.
Category C
Category C
Antihypertensive Combination
Antihypertensive Combination