Metoprolol is a beta-blocker commonly prescribed for high blood pressure, angina, certain heart-rhythm problems, heart failure, and after some heart attacks. Many people tolerate it well, but side effects can occur.
10 possible side effects
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Tiredness or fatigue — especially when starting treatment or after a dose increase.
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Dizziness or lightheadedness — particularly when standing up.
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Slow heart rate (bradycardia) — metoprolol intentionally lowers heart rate, but an excessively slow rate can be problematic.
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Low blood pressure — which can contribute to weakness or dizziness.
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Cold hands and feet — reduced peripheral circulation can make extremities feel cold.
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Sleep problems or vivid dreams — some people notice changes in sleep.
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Depressed mood — mood changes can occur, although they aren’t experienced by everyone.
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Shortness of breath or wheezing — uncommon, but more concerning in people with asthma or certain lung conditions.
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Nausea or stomach discomfort — usually mild when it occurs.
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Sexual difficulties — decreased libido or erectile difficulties can occur in some people.
⚠️ Don’t stop metoprolol suddenly
This is particularly important. Abruptly stopping a beta-blocker can cause a rapid increase in heart rate or blood pressure and potentially worsen angina or trigger serious heart problems. Dose changes should be made with the prescribing clinician.
Seek urgent medical attention for fainting, severe difficulty breathing, chest pain, a very slow or irregular heartbeat, or severe swelling.
Also, metoprolol can mask some warning signs of low blood sugar, particularly a rapid heartbeat, so people with diabetes should be aware of this.
If you’re experiencing a particular side effect, tell me your metoprolol dose, how long you’ve been taking it, and what you’re experiencing, and I can explain whether it is a known effect and what to discuss with your doctor.
