- Hypertension, also known as high blood pressure
- Tachyarrhythmia, or abnormally elevated heart rate
- Are pregnant or nursing
- Suffer from Congestive Heart Failure (CHF)
- Have illustrated any hypersensitivity to atenolol
- Renal insufficiency
- Diabetes
- Sympathomimetics
- Anesthetic Agents
- Phenothiazines
- Furosemide
- Calcium channel blockers
- Hydralazine
- Drugs that cause hypotension
- Develops a cough
- Becomes suddenly lethargic
- Has difficulty breathing