Metoprolol: 10 Side Effects That Are Easy to Overlook
Metoprolol is a beta blocker commonly used for high blood pressure, angina, certain abnormal heart rhythms, and other heart conditions. Many people tolerate it well, but side effects can occur.
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10 possible side effects
Unusual tiredness or low energy — one of the more commonly reported effects.
Dizziness or lightheadedness — particularly when standing up, sometimes related to lowered blood pressure or heart rate.
Cold hands and feet — beta blockers can reduce blood flow to the extremities.
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Sleep problems or vivid dreams — nightmares and insomnia have been reported.
Mood changes — depression has been reported in some people taking metoprolol, although symptoms can have many other causes.
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Memory or concentration difficulties — confusion and short-term memory problems have been reported, although these aren’t among the most common effects.
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Sexual difficulties — reduced libido or erectile difficulties can occur, although the evidence that metoprolol itself causes these problems isn’t definitive.
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Nausea or stomach discomfort — gastrointestinal symptoms such as nausea, diarrhea, abdominal discomfort, or constipation can occur.
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Shortness of breath or wheezing — this is particularly important in people with asthma or other breathing problems.
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Slow heartbeat or excessively low blood pressure — metoprolol deliberately slows the heart, but an excessively slow rate can cause weakness, dizziness, fainting, or other symptoms.
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🚨 When to contact a doctor urgently
Seek prompt medical attention for fainting, severe dizziness, new or worsening shortness of breath, wheezing, swelling of the legs, an irregular heartbeat, or chest pain. These symptoms can indicate a significant cardiovascular or respiratory problem.
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Don’t stop metoprolol suddenly
This is especially important. Stopping metoprolol abruptly can worsen the underlying heart condition and may precipitate serious problems. If side effects are bothering you, your doctor can decide whether the dose should be changed or another treatment used.
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Bottom line: Feeling tired, dizzy, or cold in the hands and feet can be relatively common, while breathing problems, fainting, very slow heart rate, or worsening heart symptoms deserve prompt medical attention. A side effect should always be considered in the context of why you’re taking metoprolol and what other medicines you use.
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