Metoprolol: 10 side effects to know about
Metoprolol is a beta-blocker used for conditions including high blood pressure, angina, certain abnormal heart rhythms, heart failure, and after some heart attacks. It works partly by slowing the heart rate and lowering blood pressure. MedlinePlus
Not everyone experiences side effects, and the severity varies.
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Tiredness or fatigue — one of the more commonly reported effects.
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Dizziness or lightheadedness — particularly when standing up quickly.
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Slow heartbeat (bradycardia) — metoprolol intentionally slows the heart, but an excessively slow rate can be problematic.
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Low blood pressure — may cause weakness, dizziness, or fainting.
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Shortness of breath — should be discussed with a clinician, particularly in someone with heart or lung disease.
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Cold hands and feet — reduced peripheral circulation can occur.
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Diarrhea or other digestive symptoms — diarrhea is among the reported adverse effects.
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Sleep problems or nightmares — these have been reported with metoprolol.
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Depressed mood or confusion — these are reported but aren’t experienced by everyone.
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Sexual difficulties — reduced sexual interest or erectile difficulties can occur in some people. Mayo Clinic+1
🚨 Symptoms that need prompt attention
Contact a healthcare professional promptly for fainting, significant swelling of the legs, unexplained rapid weight gain, worsening shortness of breath, or a rapid/irregular heartbeat. MedlinePlus
People with diabetes should also know that metoprolol can increase the risk of low blood sugar and mask some warning symptoms of hypoglycemia, such as a fast heartbeat. MedlinePlus
Don’t stop metoprolol suddenly
Even if you suspect it’s causing side effects, don’t abruptly discontinue it without medical guidance. Sudden withdrawal can cause serious heart problems, particularly in people taking it for heart disease. MedlinePlus
If you tell me your metoprolol dose (for example, 25 mg, 50 mg, or 100 mg), whether it’s metoprolol tartrate or succinate, and what symptoms you’re experiencing, I can explain which effects are most relevant.
