Metoprolol is a beta-blocker commonly prescribed for high blood pressure, certain heart rhythm disorders, angina, heart failure, and after heart attacks.
Common side effects
These are relatively well known and may improve as the body adjusts:
- Fatigue or tiredness
- Dizziness or lightheadedness
- Slow heart rate
- Cold hands and feet
- Mild shortness of breath during exertion
- Nausea or stomach upset
- Headache
- Sleep disturbances or vivid dreams
Less common but important side effects
Contact your healthcare provider if these occur:
- Worsening depression or significant mood changes
- Fainting, severe dizziness, or symptoms of excessively low blood pressure
Other possible effects can include sexual dysfunction, worsening symptoms in some people with asthma or severe lung disease, and worsening heart failure symptoms in susceptible individuals.
Important warnings
- Do not stop metoprolol abruptly unless instructed by your clinician. Sudden discontinuation can increase the risk of chest pain, abnormal heart rhythms, or heart attack in some patients.
- Metoprolol can mask some symptoms of low blood sugar, which is important for people with diabetes.
- Drug interactions and individual health conditions can affect side effects and safety.
When to seek urgent medical attention
Get immediate medical care if you experience:
- Severe shortness of breath
- Chest pain
- Fainting
- Signs of a serious allergic reaction (swelling of the face, lips, tongue, or throat)
Bottom line
Metoprolol is a widely used medication with well-documented benefits and risks. Most people do not experience all of the side effects listed above, and many tolerate the medication well. If you’re taking metoprolol and have concerns about symptoms you’re experiencing, I can help explain whether they are known side effects and what questions to ask your healthcare provider.
