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A: Atenolol (Tenormin) belongs to the group of drugs called beta blockers. Atenolol works by reducing heart rate and blood pressure. It is used in patients with high blood pressure (hypertension) or chest pain (angina) and to treat or prevent heart attacks.tenolol, sold under the brand name Tenormin, is a prescription drug used to treat high blood pressure. It is also used to treat angina and chest pain, and has been shown to improve survival rates after a heart attack by decreasing the severity of the heart attack.
What is atenolol? Atenolol (Tenormin) is in a group of drugs called beta-blockers. Beta-blockers affect the heart and circulation (blood flow through arteries and veins). Atenolol is used to treat angina (chest pain) and hypertension (high blood pressure). It is also used to treat or prevent heart attack. Atenolol may also be used for purposes other than those listed in this medication guide.