What are atenolol (Tenormin) side effects?

Some of the common side effects of atenolol are listed below. Tell your doctor if these symptoms are severe or persist over time.

• Lightheadedness or dizziness
• Drowsiness
• Tiredness
• Depression
• Diarrhea
• Nausea

Some of the adverse reactions of atenolol are more serious. Please call your doctor immediately if you experience side effects such as:

• Swelling in the hands, lower legs, ankles, or feet
• Shortness of breath
• Fainting
• Weight gain

The above list may not include all the potential side effects of atenolol. Seek medical attention right away if you have severe or worsening side effects. You can also report unusual side effects to the Food and Drug Administration at 1-800-FDA-1088.

Atenolol Overdose: In case of an overdose, call your doctor immediately or call the poison control helpline at 1-800-222-1222. If a person cannot be awakened, has trouble breathing, has had a seizure, or has collapsed, call 911 immediately. Symptoms of atenolol overdose can include extreme tiredness, weakness, slow heart rate, difficulty breathing, wheezing, fainting, sweating, blurred vision, headache, pale color, and sudden hunger.

NOTE: Prescription medicines such as atenolol are the property of the respective owners and are intended for their use only. Do not share your medicine with others or use other people’s prescription medicines.

Source: FDA