Metoprolol is a beta blocker commonly prescribed for high blood pressure, certain heart rhythm problems, angina, and heart failure. Like all medications, it can cause side effects, though many people tolerate it well.
Here are 10 commonly reported side effects and what to know about them:
| Side Effect | What it may feel like |
|---|---|
| Fatigue or tiredness | Lower energy, especially when starting treatment or after a dose increase |
| Dizziness | Lightheadedness, particularly when standing up quickly |
| Slow heart rate (bradycardia) | A noticeably slower pulse; may cause fatigue or dizziness |
| Cold hands and feet | Reduced circulation to the extremities |
| Low blood pressure | Weakness, faintness, or feeling unsteady |
| Shortness of breath | More common in people with asthma or other lung conditions |
| Sleep disturbances | Insomnia, vivid dreams, or altered sleep patterns |
| Depression or mood changes | Some people report low mood, though the relationship is not always clear |
| Nausea or digestive upset | Mild stomach discomfort, nausea, or diarrhea |
| Sexual dysfunction | Reduced libido or difficulty with sexual performance in some individuals |
When to seek medical attention
Contact a healthcare professional promptly if you experience:
- Fainting or severe dizziness
- Difficulty breathing
- Chest pain
- Very slow heart rate
- Swelling that worsens rapidly
- Signs of an allergic reaction (rash, swelling of the face or throat, difficulty breathing)
Important notes
- Do not stop metoprolol suddenly unless instructed by your doctor. Abrupt discontinuation can worsen heart conditions and may increase the risk of serious cardiovascular events.
- Side effects often improve as the body adjusts to the medication.
- If side effects are bothersome, your clinician may adjust the dose or consider an alternative medication.
If you’re taking metoprolol and have a specific side effect you’re concerned about, I can help explain whether it’s a common reaction, something that warrants medical attention, or a possible sign of another issue.
