Olmesar 20 mg tablet is commonly prescribed to manage high blood pressure (hypertension). By lowering blood pressure, it helps reduce the risk of heart problems, stroke, and damage to blood vessels. In certain patients, particularly those with diabetes or kidney disease caused by hypertension, it may also help protect kidney function by reducing strain on the kidneys. This medicine should only be taken if recommended by a qualified healthcare professional, as inappropriate use can cause side effects such as low blood pressure, kidney function changes, or high potassium levels.