Atenolol is a beta blocker medication primarily used to treat high blood pressure and heart-associated chest pain. [6]. Detailed Atenolol dosage information for adults and the elderly. Includes dosages for Hypertension, Myocardial Infarction, Angina Pectoris and more; plus renal, liver and dialysis adjustments. Atenolol (Tenormin) is used to treat high blood pressure and angina, and to reduce heart attack risk. Learn about its side effects, dosage, uses, and more. Atenolol is a beta-blocker that affects the heart and circulation (blood flow through arteries and veins). Atenolol is used to treat angina (chest pain) and hypertension (high blood pressure). Atenolol is also used to lower the risk of death after a heart attack. Atenolol (Tenormin) is a medication that treats high blood pressure. It can also prevent chest pain and further damage after a heart attack. Atenolol is used to treat high blood pressure, angina (chest pain) and improve survival after a heart attack. Atenolol is in a class of medications called beta blockers. Atenolol is used alone or together with other medicines to treat high blood pressure (hypertension). High blood pressure adds to the workload of the heart and arteries. If it continues for a long time, the heart and arteries may not function properly. Find patient medical information for Atenolol (Tenormin) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Atenolol (Tenormin) is a beta blocker that can treat certain heart conditions, such as chest pain, and high blood pressure. It can also lower the risk of death after a heart attack. Atenolol is a prescription drug used to treat high blood pressure. Learn about side effects, drug interactions, dosages, warnings, and more.