Compare Atenolol vs. Toprol XL

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

Tenormin
(Atenolol)

Toprol Xl
(Metoprolol Succinate)

Lowers blood pressure and controls heart rate. Tenormin (Atenolol) is good for controlling chest pain and treating a heart attack. It has fewer side effects than other beta blockers. You need to take it on an empty stomach and you can't skip doses.Lowers blood pressure and controls heart rate. Toprol Xl (Metoprolol Succinate) is good for controlling chest pain and treating heart failure and heart attack. You can't miss doses.
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Reviews & ratings
Filter group. All currently selected
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4.92Atenolol
Reviews for Tenormin (Atenolol)
58%
of people (All ages) say Tenormin (Atenolol) is worth it
48%
say it works well
16%
say it's a big hassle
457 reviews
Have you used Tenormin (Atenolol)?
Worth itNot sureNot worth it
Reviews for Toprol Xl (Metoprolol Succinate)
60%
+2% better vs. Tenormin (Atenolol)
54%
+6% better vs. Tenormin (Atenolol)
13%
+3% better vs. Tenormin (Atenolol)
164 reviews
Have you used Toprol Xl (Metoprolol Succinate)?
Worth itNot sureNot worth it
Side effects
AtenololToprol XL
  • Tiredness 13%
  • Dizziness 7%
  • Low mood disorder 3%
  • Cold arms and legs 7%
  • Fatigue 1%
  • Shortness of breath 2%
  • Light-headedness 3%
  • Leg pain 2%
  • Decreased energy 3%
More Atenolol side effects »
  • Tiredness 10%
  • Dizziness 10%
  • Low mood disorder 5%
  • Diarrhea 5%
  • Rash or pruritus 5%
  • Shortness of breath 3%
  • Abnormally slow heartbeat 3%
  • Low blood pressure 4%
  • Heart block 3%
More Toprol XL side effects »
How it works
AtenololToprol XL
Tenormin (Atenolol) is a selective beta blocker that works specifically on the heart by slowing down the heart and making the heart pump better.Toprol Xl (Metoprolol Succinate) is a beta blocker. It lowers blood pressure by slowing heart rate, relaxing blood vessels, and lowering the body's fight-or-flight response.
Type of medication
AtenololToprol XL
Prescription only
Prescription only
Available as
AtenololToprol XL
  • Pill
  • Pill
  • Extended release
Used for
AtenololToprol XL
Risk factors for serious side effects
AtenololToprol XL
  • Suddenly stopping Tenormin (Atenolol)
    • Taking calcium channel blockers
    • Major surgery requiring anesthesia
    • Diabetes
      • Taking clonidine
      Detailed Tenormin (Atenolol) risks & warnings »
      • Diabetes
        • Coronary artery disease
        • Heart failure
        • Major surgery requiring anesthesia
        • History of asthma
        Detailed Toprol Xl (Metoprolol Succinate) risks & warnings »
        Pregnancy

        Research studies with real people found harmful effects on unborn babies, but the benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

        Research studies with animals found harmful effects on unborn babies. It hasn’t been properly studied in humans. The benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

        Upsides and benefits
        AtenololToprol XL
        • A first-choice treatment to prevent chest pain (angina).
        • A first-choice treatment for heart attack recovery.
        • At lower doses, Tenormin (Atenolol) has fewer side effects than other beta blockers because it targets the heart and not other parts of the body.
        • A first-choice treatment to prevent chest pain (angina). Makes pain attacks less frequent and makes it easier to be active without having chest pain.
        • A first-choice treatment for heart failure. May prevent long-term heart damage.
        • A first-choice treatment for heart attack. Lowers the risk of death during and after a heart attack.
        • Toprol XL is the extended release version of Lopressor.
        Downsides and risks
        AtenololToprol XL
        • You need to take Tenormin (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 it might not go away for others.
        • Not a first-choice treatment for high blood pressure unless you have heart disease. However, your doctor could add it to other medicines you're already if your blood pressure is still too high.
        • You can't miss or skip doses. If you stop Tenormin (Atenolol) suddenly, it can cause your blood pressure to go up really quickly, raising your risk of heart attack and stroke.
        • Tenormin (Atenolol) can hide symptoms of low blood sugar if you're diabetic.
        • 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.
        • Can hide symptoms of low blood sugar if you're diabetic.
        • You can't miss doses. Stopping Toprol XL suddenly can cause your blood pressure to go up suddenly, which raises the risk of heart attack and stroke.
        Tips from our pharmacists for people taking the medication
        AtenololToprol XL
        • Lowers bad cholesterol and triglycerides. Raises good cholesterol.
        • Avoid grapefruit and grapefruit juice while taking this medicine.
        • Tell your doctor if you develop sudden muscle pain, fever, or weakness.
        • Tell your doctor if you notice dark urine or yellowing in your eyes or skin.
        • 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 headache.
        • Can hide symptoms of low blood sugar. Be careful if you're diabetic.
        • Don't stop taking this medicine suddenly.
        • Extended release version. Also comes in immediate release called Lopressor (metoprolol tartrate).
        Learn more
        More about AtenololSide effectsReviews & ratingsAlternativesFDA package insert
        Have you used Tenormin (Atenolol)?
        Worth itNot sureNot worth it
        More about Toprol XLSide effectsReviews & ratingsAlternativesFDA package insert
        Have you used Toprol Xl (Metoprolol Succinate)?
        Worth itNot sureNot worth it