Atenolol is used to treat angina (chest pain) and hypertension (high blood pressure). Learn about side effects, interactions and indications. NHS information about the medicine atenolol, including what it's used for, who can take it, how to take it and side effects. Atenolol (Tenormin) is a medication that treats high blood pressure. It can also prevent chest pain and further damage after a heart attack. Learn about the side effects of atenolol, from common to rare, for consumers and healthcare professionals. 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 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 prescription drug used to treat high blood pressure. Learn about side effects, drug interactions, dosages, warnings, and more. Atenolol is a beta blocker medication primarily used to treat high blood pressure and heart-associated chest pain. [6] Although used to treat high blood pressure, it does not seem to improve mortality in those with the condition. [7][8] Other uses include the prevention of migraines and treatment of certain irregular heart beats. [6][9] It is taken orally (by mouth) or by intravenous injection. Atenolol may cause heart failure in some patients. Check with your doctor right away if you are having chest pain or discomfort, dilated neck veins, extreme fatigue, irregular breathing or heartbeat, swelling of the face, fingers, feet, or lower legs, trouble breathing, or weight gain. View atenolol information, including dose, uses, side-effects, renal impairment, pregnancy, breast feeding, contra-indications and monitoring requirements.