TENORMIN LS, also known by its generic name Atenolol, is a prescription medication belonging to the class of drugs known as beta-blockers. It is primarily used to manage and treat high blood pressure (hypertension), angina (chest pain), and in some cases, to improve survival after a heart attack. By blocking the action of certain natural chemicals in your body, such as epinephrine, on the heart and blood vessels, TENORMIN LS effectively lowers heart rate, blood pressure, and strain on the heart. This medication is taken orally, and its dosage and duration of treatment are determined by the patient's medical condition and response to therapy. It is crucial for patients to follow their healthcare provider's instructions closely when taking TENORMIN LS to ensure its effectiveness and to minimize potential side effects.