Metoprolol is a beta-blocker commonly prescribed to treat high blood pressure, chest pain (angina), certain heart rhythm disorders, and heart failure. Most people tolerate it well, but like any medication, it can cause side effects.
Here are 10 common or important side effects:
- Fatigue or tiredness
- One of the most common side effects, especially when starting treatment or after a dose increase.
- Dizziness or lightheadedness
- Can occur because metoprolol lowers blood pressure.
- Slow heart rate (bradycardia)
- The medication is designed to slow the heart, but occasionally it slows it too much.
- Cold hands and feet
- Reduced blood flow to the extremities may cause this.
- Low blood pressure (hypotension)
- May cause faintness, especially when standing up quickly.
- Shortness of breath
- Although uncommon, it can occur, particularly in people with asthma or certain lung conditions.
- Sleep problems or vivid dreams
- Some people report insomnia or unusual dreams.
- Digestive symptoms
- Such as nausea, diarrhea, constipation, or stomach discomfort.
- Sexual dysfunction
- Some people experience decreased libido or erectile dysfunction.
- Depressed mood
- Mood changes have been reported, although the relationship is not always clear.
When to seek medical advice urgently
Contact your healthcare provider promptly or seek emergency care if you experience:
- Fainting or severe dizziness
- A very slow heart rate
- Difficulty breathing or wheezing
- Swelling of the face, lips, or tongue (possible allergic reaction)
- Chest pain that is new or worsening
Important reminders
- Do not stop taking Metoprolol suddenly. Abruptly stopping it can worsen chest pain or increase the risk of a heart attack or abnormal heart rhythm. If it needs to be discontinued, your healthcare provider will usually recommend reducing the dose gradually.
- If you develop bothersome side effects, talk with your prescriber. In many cases, adjusting the dose or switching medications can help.
For most people, the benefits of metoprolol in treating heart conditions and reducing cardiovascular risk outweigh the potential side effects, especially when it is taken as prescribed and monitored appropriately.
