Atenolol is a medication that belongs to a class of drugs known as beta-blockers. It is primarily used to treat high blood pressure and certain heart conditions, such as angina and irregular heartbeats. By blocking the effects of adrenaline on the heart, atenolol helps to lower heart rate and blood pressure, making it easier for the heart to pump blood. In addition to its use in managing hypertension, atenolol may also be prescribed to reduce the risk of heart attacks and improve survival after a heart attack. It is usually taken in pill form and should be used under the guidance of a healthcare professional.