Atenolol vs. timolol

Head-to-head comparisons of medication uses, side effects, ratings, and more.

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Lowers blood pressure and controls heart rate. Tenormin (Atenolol) is good for controlling chest pain and treating heart failure and heart attack with fewer side effects than other beta blockers. You have to take it on an empty stomach, and you can't miss doses.Coming soon.
How it works
Tenormin (Atenolol) is a selective beta blocker that works specifically on the heart. It lowers blood pressure by slowing down the heart and making it less work to pump.Coming soon.
Type of medication
Beta blocker
Prescription only
Coming soon.
Available as
  • Pill
  • Pill
  • Eye drops
  • Extended release
Used for (click to learn more)
  • Hypertension Migraine; Prophylaxis Ocular hypertension Open-angle glaucoma Postmyocardial infarction syndrome; Prophylaxis
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Reviews & ratings
Button Group. All currently active
Button Group. All currently active
Reviews for Tenormin (Atenolol)
of people say Tenormin (Atenolol) is worth it
say it works well
say it's a big hassle
Side effects
  • Tiredness 13%
  • Dizziness 7%
  • Cold extremities 7%
  • Low mood disorder 3%
  • Vivid dreams 2%
  • Shortness of breath 2%
  • Leg pain 2%
  • Nausea 2%
  • Diarrhea 1%
  • Fatigue 1%
More Atenolol side effects »

We haven’t found good data for timolol side effects.

FDA side effect reports for timolol »
Risk factors for serious side effects
  • Suddenly stopping Tenormin (Atenolol)
    • Taking calcium channel blockers
    • Major surgery requiring anesthesia
    • Diabetes
      • Taking clonidine
      Detailed Tenormin (Atenolol) risks & warnings »
      Coming soon.
      Pregnancy category
      No specific alcohol-related info.No specific alcohol-related info.
      No specific food-related info.No specific food-related info.
      Kidneys and liver
      No specific kidneys and liver-related info.No specific kidneys and liver-related info.
      No specific sex-related info.No specific sex-related info.
      No specific sleep-related info.No specific sleep-related info.
      No specific weight-related info.No specific weight-related info.
      Upsides and benefits
      • A first-choice treatment to prevent chest pain (angina).
      • A first-choice treatment for heart failure and heart attack.
      • At lower doses, Atenolol has fewer side effects than most beta blockers because it targets the heart and doesn't cross into the brain and central nervous system.
      Coming soon.
      Downsides and risks
      • You have to take Atenolol on an empty stomach.
      • Taking a beta blocker might make you feel more tired or out of breath during exercise or normal daily routines. This gets better for most people, but for some might not go away.
      • Not a first-choice treatment for high blood pressure according to the latest guidelines, except if you have heart failure or heart disease. As a second choice, your doctor might add it to medicines you're already taking if your blood pressure is still too high.
      • You can't miss doses. Stopping Atenolol suddenly can cause your blood pressure to go up suddenly, which raises the risk of heart attack and stroke.
      • Can hide symptoms of low blood sugar if you're diabetic.
      Coming soon.
      Tips from our pharmacists for people taking the medication
      • Take it on an empty stomach.
      • Can cause dizziness in the first few days.
      • Check your blood pressure 1 week after starting this medicine, and tell your doctor if it hasn't improved.
      • Can cause fatigue and insomnia.
      • Can hide symptoms of low blood sugar. Be careful if you're diabetic.
      • Don't stop taking this medicine suddenly.
      Coming soon.
      Learn more
      More about AtenololSide effectsReviews & ratingsAlternativesFDA package insert
      More about timololSide effectsFDA package insert