Used as an active metabolite of losartan, it acts as a selective angiotensin II receptor blocker (ARB). It is primarily employed in the treatment of hypertension by inhibiting the vasoconstrictor and aldosterone-secreting effects of angiotensin II, leading to reduced blood pressure. It also provides renal protection in diabetic patients and is used in managing chronic heart failure. Its action helps delay the progression of diabetic nephropathy by reducing proteinuria and maintaining glomerular filtration rate.