The 10 Most Common Side Effects of Metoprolol: A Helpful Guide
Metoprolol is a beta-blocker commonly prescribed for conditions such as high blood pressure, chest pain (angina), certain heart rhythm problems, heart failure (specific forms), and after a heart attack. It works by slowing the heart rate and reducing the workload on the heart.
Like all medications, metoprolol can cause side effects. Many are mild and improve as the body adjusts.
1. Tiredness or fatigue
- Feeling less energetic is one of the most commonly reported effects.
- It may improve after your body adapts to the medication.
2. Dizziness or lightheadedness
- This can happen when blood pressure drops, especially when standing up quickly.
3. Slow heartbeat
- Metoprolol is designed to lower heart rate.
- A heart rate that becomes too slow may cause weakness, dizziness, or fainting.
4. Cold hands and feet
- Reduced circulation to the extremities may make fingers and toes feel colder.
5. Reduced exercise tolerance
- Because metoprolol limits how high your heart rate rises during activity, exercise may feel more challenging at first.
6. Sleep changes
- Some people experience trouble sleeping, vivid dreams, or changes in sleep patterns.
7. Digestive issues
- Nausea, diarrhea, constipation, or stomach discomfort can occur.
8. Mood changes
- Some people report changes in mood, although a direct cause-and-effect relationship is not clear for most people.
9. Sexual side effects
- Some individuals experience reduced sexual desire or erectile difficulties.
10. Masking symptoms of low blood sugar
- In people with diabetes, metoprolol may make a fast heartbeat less noticeable during low blood sugar episodes.
When to contact a healthcare professional
Seek medical advice if you experience:
- Fainting or severe dizziness
- A very slow heartbeat
- New or worsening shortness of breath
- Wheezing (especially if you have asthma or lung disease)
- Swelling of the face, lips, or tongue
Important safety note
Do not stop metoprolol suddenly without medical guidance. Stopping it abruptly can increase heart rate and may raise the risk of chest pain, heart rhythm problems, or other serious complications.
If you take metoprolol and are concerned about side effects, share your dose, whether it is metoprolol tartrate or succinate, how long you’ve been taking it, and your symptoms—that information can help clarify what may be related to the medication.
