Prescription onlyLower-cost generic available



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Lowers blood pressure and controls heart rate.

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Prescription onlyLower-cost generic available

Our pharmacists’ bottom line

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.

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  • 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.
  • 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.

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Side effects for Tenormin (Atenolol)

From clinical trials of Atenolol / High blood pressure  ( 806)

  • TirednessTiredness26% for Atenolol vs.13% for placebo
  • DizzinessDizziness13% for Atenolol vs.6% for placebo
  • Low mood disorderLow mood disorder12% for Atenolol vs.9% for placebo
  • Cold extremitiesCold extremities12% for Atenolol vs.5% for placebo
  • FatigueFatigue6% for Atenolol vs.5% for placebo
  • Shortness of breathShortness of breath6% for Atenolol vs.4% for placebo
  • Positional low blood pressurePositional low blood pressure4% for Atenolol vs.5% for placebo
  • Light-headednessLight-headedness3% for Atenolol vs.0% for placebo
  • Leg painLeg pain3% for Atenolol vs.1% for placebo
  • Lack of energyLack of energy3% for Atenolol vs.0% for placebo

What to expect when you take Tenormin (Atenolol) for Lowers blood pressure

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Tips from our pharmacists
  • 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.

Risks and Warnings for Tenormin (Atenolol)

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    • Higher risk if:
    • Suddenly stopping Tenormin (Atenolol)

    Do not stop taking Tenormin (Atenolol) suddenly without consulting your doctor if you have coronary artery disease, as chest pain or angina may become increased or it may start a heart attack. Talk to your doctor if you are interested in stopping this medication.

    This is a black box warning. The FDA requires this warning when there is a significant risk of serious or life-threatening effects that anyone taking the drug should consider.

Means that some groups have a high risk of experiencing this side effect

Tips from pharmacists and people taking Tenormin (Atenolol)

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The FDA category for this medication is D. It is advised that you: Weigh risks vs. benefits
  • I have svt. I am told to take it daily but I don't. It's works really good for me when I have a few days of on and off palpitations. I sleep better and I've noticed at times it helps with stress headaches. Cheap too. No side effects for me at all. Zero nausea on empty stomach. Great drug that's been around for decades. Maybe not the most potent but does the trick for me without over medicating
    Age: 42
    Gender: Man
    Taken for: High blood pressure