Atenolol (Tenormin®) is a prescription medication approved for treating certain conditions related to the heart and blood vessels. It is licensed for:
- High blood pressure (hypertension) control
- Relief of chest pain caused by angina
- Treatment following a heart attack to improve survival.
There is currently only one form of the drug: oral atenolol tablets that are available in 25 mg, 50 mg, and 100 mg strengths. The medicine is taken by mouth, typically once a day (with or without food). Although it does not matter what time of day you take atenolol, it is important that you take it at the same time each day to maintain even drug levels in your blood.
Atenolol is part of a class of drugs known as beta blockers. It works by blocking a specific type of beta receptor called beta-1 receptors. By blocking beta-1 receptors, atenolol decreases heart rate, systolic and diastolic blood pressure, and the workload of the heart. This means that the heart requires less blood and oxygen to work properly.
(Click Atenolol for more information on when and how to take this product, for a list of important warnings and precautions that you should be aware of before starting treatment, and to find out what side effects may occur.)