Metoprolol: The Good, The Bad, and the “Ugly”
Metoprolol is a beta blocker that slows the heart rate and reduces the heart’s workload. It’s commonly prescribed for high blood pressure, angina, certain abnormal heart rhythms, and other heart conditions. Most people tolerate it well, and many side effects improve as the body adjusts.
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10 side effects worth knowing
Tiredness or weakness — particularly when starting treatment or increasing the dose.
Dizziness or light-headedness — metoprolol can lower blood pressure and heart rate.
Slow heartbeat — excessive slowing can sometimes require medical attention.
Low blood pressure — may cause weakness, dizziness, or fainting.
Cold hands and feet — reduced peripheral circulation can make your extremities feel cold.
Sleep problems or vivid dreams — insomnia and nightmares have been reported.
Low mood or depression — depression is a reported adverse effect.
Shortness of breath or wheezing — particularly important if you have asthma or another breathing disorder.
Diarrhea or stomach discomfort — gastrointestinal effects can occur.
Memory or concentration changes — confusion and short-term memory problems have been reported, although these symptoms can have many other causes.
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The symptoms you shouldn’t ignore
Contact a healthcare professional if you develop fainting, significant swelling, worsening shortness of breath, an irregular heartbeat, or persistent severe dizziness. New or worsening chest pain or severe breathing difficulty requires urgent medical attention.
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One particularly important point: don’t stop metoprolol abruptly. Sudden withdrawal can worsen angina and, in some patients, increase the risk of serious heart problems. Any reduction should be supervised by your prescriber.
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Also tell your doctor or pharmacist about your other medicines. For example, some blood-pressure drugs can compound low blood pressure, while certain medicines can increase the risk of a slow heartbeat. Metoprolol can also make the warning signs of low blood sugar less noticeable in people taking diabetes medicines.
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Bottom line: Metoprolol can cause bothersome effects, but that doesn’t mean it’s harming you. If you’re experiencing a new symptom, don’t stop the medication on your own—have your clinician determine whether it’s a side effect, a dose issue, or something unrelated.
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