Final answer:
The preferred option for treating unilateral renal artery stenosis is an Angiotensin II receptor blocker (ARB). ARBs help to relax blood vessels, lower blood pressure, and improve blood flow to the kidneys.
Step-by-step explanation:
The treatment for unilateral renal artery stenosis depends on several factors, including the severity of the stenosis and the presence of other medical conditions. In most cases, the primary goal is to control blood pressure and preserve kidney function. One of the preferred options for treating renal artery stenosis is an Angiotensin II receptor blocker (ARB). ARBs help to relax blood vessels, lower blood pressure, and improve blood flow to the kidneys.