Metoprolol: 10 Common Side Effects — The Good, the Bad, and the “Ugly”
Metoprolol is a beta-blocker commonly used for high blood pressure, angina, certain abnormal heart rhythms, and after a heart attack. Like any medicine, it can cause side effects. Most are mild and may improve as your body adjusts.
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10 side effects to know
Tiredness or fatigue — one of the most common effects.
Dizziness or lightheadedness — particularly when standing up quickly.
Slow heart rate (bradycardia) — metoprolol intentionally slows the heart, but an excessively slow rate can be a problem.
Low blood pressure — may cause weakness, dizziness, or fainting.
Shortness of breath — can occur and deserves attention, particularly if new or worsening.
Diarrhea or stomach upset — gastrointestinal effects are reported with metoprolol.
Depressed mood — depression has been reported in clinical studies.
Sleep problems or vivid dreams — nightmares and insomnia have been reported.
Cold hands or feet — reduced circulation to the extremities can occur.
Skin rash or itching — less common but recognized reactions.
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The important “UGLY”
Don’t stop metoprolol suddenly on your own. Abrupt withdrawal of a beta-blocker can cause a rebound increase in heart rate and blood pressure and may worsen angina or increase the risk of a heart attack.
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Seek urgent medical attention for fainting, severe difficulty breathing, severe/worsening chest pain, or signs of a serious allergic reaction.
If you’re taking metoprolol and tell me your dose (e.g., 25 mg, 50 mg, 100 mg), whether it’s tartrate or succinate, and what symptoms you’re experiencing, I can help you determine which side effects are most relevant.
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