Atenolol is used alone or together with other medicines (such as hydrochlorothiazide) 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. This can damage the blood vessels of the brain, heart, and kidneys, resulting in a stroke, heart failure, or kidney failure.
High blood pressure may also increase the risk of heart attacks.
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
cold hands or feet
difficult or labored breathing
dizziness, faintness, or lightheadedness when getting up from a lying or sitting position suddenly