Metoprolol is a beta-blocker commonly prescribed for high blood pressure, chest pain (angina), certain heart rhythm problems, and heart failure. It works by slowing the heart rate and reducing the effects of stress hormones like adrenaline.
Many people take metoprolol without serious problems, but side effects can occur—especially when starting treatment or changing the dose.
10 Common Side Effects of Metoprolol
- Tiredness or low energy
- Feeling more fatigued than usual is one of the most frequently reported effects.
- Dizziness or lightheadedness
- This may happen as your blood pressure lowers, especially when standing up quickly.
- Slow heartbeat
- A slower pulse is an expected effect, but an unusually slow heart rate with weakness or fainting should be checked.
- Cold hands and feet
- Reduced circulation to the extremities may cause a feeling of coldness.
- Sleep changes
- Some people experience trouble sleeping, vivid dreams, or changes in sleep patterns.
- Digestive symptoms
- Nausea, diarrhea, constipation, or stomach discomfort can occur.
- Shortness of breath or reduced exercise tolerance
- Some people notice they tire more easily during activity, especially early in treatment.
- Mood changes
- Less commonly, people report low mood or other emotional changes.
- Sexual side effects
- Some people experience reduced sexual desire or erectile difficulties.
- Masking low blood sugar symptoms
- In people with diabetes, metoprolol may make warning signs such as a racing heartbeat less noticeable during hypoglycemia.
Contact a healthcare professional if you notice:
- Fainting or severe dizziness
- Very slow heartbeat
- New or worsening breathing problems
- Chest pain
- Swelling of the legs or sudden weight changes
Important: Do not stop metoprolol suddenly unless instructed by a healthcare professional. Abruptly stopping beta-blockers can cause serious heart-related problems in some people.
If you take metoprolol, the most useful details for understanding side effects are your dose, whether it is immediate-release or extended-release, why you take it, and what symptoms you’re experiencing.
