10 Metoprolol Side Effects That Can Be Overlooked
Metoprolol is a beta blocker used for conditions including high blood pressure, angina, irregular heart rhythms, and some heart conditions. Many people tolerate it well, and side effects are often mild.
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Some less-discussed effects include:
Unusual tiredness or weakness — particularly when starting treatment or after a dose increase.
Dizziness or light-headedness — metoprolol can lower heart rate and blood pressure.
Cold hands and feet — reduced peripheral circulation can make the extremities feel unusually cold.
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Sleep problems or vivid dreams — insomnia and nightmares have been reported.
Low mood or depression — depression is listed among reported adverse effects.
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Memory or concentration changes — confusion and short-term memory loss have been reported, although these symptoms can have many other causes.
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Diarrhea or stomach upset — gastrointestinal effects can occur.
Shortness of breath or wheezing — particularly important in people with asthma or other breathing problems.
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A slower-than-usual heartbeat — bradycardia is a recognized effect of metoprolol.
Reduced sexual function — some people report decreased sex drive or erectile difficulties, although the evidence isn’t strong enough to establish metoprolol as the cause in every case.
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When to contact a doctor
New or worsening shortness of breath, swelling of the legs, an irregular heartbeat, severe dizziness/fainting, or a very slow heartbeat deserves medical attention. These can sometimes indicate excessive medication effects or an underlying heart problem.
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Don’t stop metoprolol suddenly. Abrupt withdrawal can worsen the underlying heart condition and may increase the risk of serious cardiac problems. Dose changes should be made with your prescriber.
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If you’re taking metoprolol and experiencing a particular symptom—especially fatigue, dizziness, cold feet, or memory problems—tell me the symptom, your dose, and whether you’re taking metoprolol tartrate or succinate, and I can explain how likely the medicine is to be responsible.
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