Metoprolol is a beta blocker commonly used to treat high blood pressure, certain heart rhythm problems, chest pain, and heart failure.
Common side effects
These are among the more frequently reported:
- Tiredness or fatigue
- Dizziness or lightheadedness, especially when standing up
- Slower heart rate
- Cold hands and feet
- Mild digestive upset (such as nausea or diarrhea)
Less common but important side effects
Some people may experience:
- Shortness of breath or worsening wheezing, particularly if they have asthma or certain lung conditions
- Depression or mood changes (the evidence is mixed, and not everyone is affected)
- Sleep disturbances or vivid dreams
- Sexual dysfunction
- Low blood pressure, which may cause fainting or weakness
Don’t stop it suddenly
If you’ve been taking metoprolol regularly, don’t stop it abruptly unless instructed by your healthcare professional. Suddenly stopping it can increase the risk of chest pain, abnormal heart rhythms, or even a heart attack in some people.
When to seek medical advice promptly
Contact a healthcare professional or seek urgent care if you develop:
- Fainting or severe dizziness
- A very slow heart rate with symptoms
- Difficulty breathing
- Swelling of the face or throat (possible allergic reaction)
- New or worsening chest pain
Bottom line
Metoprolol can cause side effects, but for many people its benefits—such as reducing the risk of heart-related complications—outweigh the risks. If you think you’re experiencing a side effect, talk with the clinician who prescribed it. They can determine whether the medication, the dose, or another condition is responsible and whether a change in treatment is appropriate.
