Atenolol Tablets

Atenolol (Tenormin®) is a prescription drug used for the treatment of certain conditions related to the heart and blood vessels. It is approved for treating high blood pressure, relieving symptoms of angina, and improving survival following a heart attack.
This medicine comes in tablet form and is available in three different strengths, including 25 mg, 50 mg, and 100 mg tablets. Atenolol is taken by mouth once a day, with or without food. Although it does not matter what time of day you take the medication, it is important that you take it at the same time each day (to maintain an even level of drug in your blood).
Atenolol is part of a class of drugs called beta blockers. It works by blocking a specific type of beta receptor called beta-1 receptors. Adrenaline attaches to these receptors and causes certain reactions in the body.
By blocking beta-1 receptors, atenolol causes the reverse effect of adrenaline. It 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 to learn more about the effects of this medication, for suggestions on when and how to take it, and to find out what you should discuss with your healthcare provider before starting treatment.)
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