indication

Tasosartan is infrequently in the treatment of hypertension and heart failure.

pharmacology

By blocking the angiotensin II (AT1) receptor, the drug ultimately causes vasodilation, reduced secretion of vasopressin (ADH), reduced production and secretion of aldosterone, amongst other actions leading to the combined effect of a reduction of blood pressure.

mechanism of action

Tasosartan is a selective, potent, orally active and long-acting nonpeptide Angiotensin II type 1 (AT1) receptor antagonist. Tasosartan blocks the renin-angiotensin-aldosterone system (RAAS) at the level of the AT1 receptor that mediates most, if not all, of the important actions of Ang II. Tasosartan binds reversibly to the AT1 receptors in vascular smooth muscle and the adrenal gland. As angiotensin II is a vasoconstrictor, which also stimulates the synthesis and release of aldosterone, blockage of its effects results in decreases in systemic vascular resistance. AT1 receptor antagonists avoid the nonspecificity of the Ang I converting enzyme (ACE) inhibitors.

drug interactions

Amiloride: Increased risk of hyperkalemia

Lithium: The ARB increases serum levels of lithium

Potassium: Increased risk of hyperkalemia

Triamterene: Increased risk of hyperkalemia