TENORETIC is a prescription medication that combines two active ingredients: atenolol and chlorthalidone. Atenolol belongs to a class of drugs known as beta-blockers, which work by slowing down the heart rate and reducing the heart's workload, thereby lowering blood pressure. Chlorthalidone is a type of diuretic, or "water pill," that helps reduce blood pressure by removing excess salt and water from the body through urine. Together, these components make TENORETIC effective in treating high blood pressure (hypertension), which can help prevent strokes, heart attacks, and kidney problems. It is important for patients to follow their healthcare provider's instructions closely when taking TENORETIC, as well as to discuss any potential side effects or interactions with other medications.