Metoprolol is a beta-blocker commonly prescribed for high blood pressure, angina, certain abnormal heart rhythms, heart failure, and to improve survival after a heart attack. It works mainly by slowing the heart rate and reducing the heart’s workload. MedlinePlus+1
10 possible side effects of metoprolol
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Tiredness or fatigue — one of the more commonly reported effects.
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Dizziness or lightheadedness — particularly when blood pressure falls.
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Slow heartbeat (bradycardia) — metoprolol intentionally slows the heart, but sometimes it can become too slow.
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Low blood pressure — which may cause weakness, dizziness, or fainting.
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Shortness of breath — especially important to report if it’s new or worsening.
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Diarrhea or other digestive symptoms — nausea, abdominal discomfort, constipation, and dry mouth can also occur.
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Cold hands or feet — reduced circulation to the extremities can occur.
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Sleep disturbances or vivid dreams — headaches, nightmares, and insomnia have been reported, particularly with metoprolol tartrate.
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Depressed mood — depression has been reported in some patients.
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Skin rash or itching — these are recognized adverse reactions. DailyMed+1
Most adverse effects are described as mild and transient, but individual responses vary. DailyMed
When to seek medical help
Contact a healthcare professional promptly if you develop fainting, significant swelling of the legs or feet, unexplained weight gain, worsening shortness of breath, or a rapid/irregular heartbeat. These can sometimes indicate a more serious problem. MedlinePlus
Don’t stop metoprolol suddenly. Abrupt withdrawal can cause serious heart problems, so the dose generally needs to be reduced under medical supervision when discontinuation is appropriate. MedlinePlus
If you’re taking metoprolol and atorvastatin together, I can also explain whether the combination is generally used safely and which symptoms would warrant contacting your doctor .
