Metoprolol: 10 Side Effects to Know
Metoprolol is a beta-blocker commonly prescribed for high blood pressure, angina, certain abnormal heart rhythms, heart failure, and after a heart attack. It slows the heart rate and lowers blood pressure. MedlinePlus+1
The commonly reported effects include:
- Tiredness or fatigue — one of the most common complaints.
- Dizziness or light-headedness — particularly when standing up quickly.
- Slow heartbeat (bradycardia) — because metoprolol deliberately reduces heart rate.
- Low blood pressure — which can cause weakness or dizziness.
- Shortness of breath — reported as a possible adverse effect and particularly important if it is new or worsening.
- Diarrhea — relatively common.
- Depressed mood — depression has been reported with metoprolol.
- Cold hands or feet — reduced peripheral circulation can occur.
- Skin rash or itching — reported adverse reactions.
- Sleep or cognitive changes — headache, nightmares, insomnia, confusion, or short-term memory problems have been reported. DailyMed+1
⚠️ When to contact a doctor promptly
Seek medical advice for fainting, significant swelling of the legs/feet, unexplained weight gain, worsening shortness of breath, or a rapid/pounding/irregular heartbeat. These can sometimes indicate a more serious problem. MedlinePlus
Don’t stop metoprolol suddenly. Abrupt withdrawal can worsen heart-related problems, including angina and potentially heart attack. Any dose reduction should be planned with your clinician. MedlinePlus+1
If you tell me your metoprolol dose (for example, 25 mg, 50 mg, or 100 mg), whether it’s tartrate or succinate, and what symptoms you’re experiencing, I can help you distinguish expected side effects from symptoms that deserve medical attention.
