Losartan is a commonly prescribed blood pressure medication. While well tolerated, losartan can cause side effects. Here’s what you need to know. Losartan is used to treat high blood pressure (hypertension). It is also used to lower the risk of stroke in certain people with heart disease. Learn about side effects, how to take, and more of losartan oral tablet. It's a prescription drug that's used for certain conditions, including high blood pressure. Find patient medical information for Losartan (Cozaar, Arbli) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Losartan, sold under the brand name Cozaar among others, is a medication used to treat high blood pressure (hypertension). [4] It is in the angiotensin receptor blocker (ARB) family of medication, and is considered protective of the kidneys. Losartan is also used to decrease the risk of stroke in patients with high blood pressure and enlargement of the heart. It is also used to treat kidney problems in patients with type 2 diabetes and a history of hypertension. This medicine is available only with your doctor's prescription. Losartan is used alone or in combination with other medications to treat high blood pressure. Losartan is also used to decrease the risk of stroke in people who have high blood pressure and a heart condition called left ventricular hypertrophy (enlargement of the walls of the left side of the heart). Losartan Tablets What is this medication? LOSARTAN (loe SAR tan) treats high blood pressure. It may also be used to prevent a stroke in people with heart disease and high blood pressure. It can be used to prevent kidney damage in people with diabetes. It works by relaxing the blood vessels, which helps decrease the amount of work your heart has. Losartan potassium tablet is an angiotensin II receptor blocker (ARB) indicated for: Treatment of hypertension, to lower blood pressure in adults and children greater than 6 years old. Lowering blood pressure reduces the risk of fatal and nonfatal cardiovascular events, primarily strokes and myocardial infarctions. ( 1.1) Reduction of the risk of stroke in patients with hypertension and left. Losartan is a prescription drug to treat high blood pressure, diabetic nephropathy, and stroke risk. Learn about side effects, warnings, dosage, and more.