Metoprolol is a prescription medication in the class of beta blockers. It is commonly used to treat high blood pressure, chest pain (angina), certain heart rhythm problems, and heart failure, and to reduce the risk of further heart problems after a heart attack.
Like all medications, it can cause side effects. Many people take metoprolol without significant problems, and side effects often improve as the body adjusts.
10 Common Side Effects of Metoprolol
- Tiredness or fatigue
- Feeling unusually tired is one of the most common side effects, especially when starting treatment or increasing the dose.
- Dizziness or lightheadedness
- This can occur because metoprolol lowers blood pressure and slows the heart rate, particularly when standing up quickly.
- Slow heart rate (bradycardia)
- Metoprolol is designed to slow the heart, but in some people it can slow it too much.
- Low blood pressure
- Symptoms may include dizziness, fainting, or weakness.
- Cold hands and feet
- Reduced blood flow to the extremities can make them feel cold.
- Shortness of breath
- This is less common but can occur, especially in people with asthma or certain lung conditions. Contact your healthcare provider if this develops or worsens.
- Digestive symptoms
- Nausea, diarrhea, constipation, or stomach discomfort may occur.
- Sleep disturbances
- Some people experience insomnia or vivid dreams.
- Headache
- Mild headaches can occur, especially early in treatment.
- Mood changes
- Some people report low mood or depression, although the relationship is not fully understood.
Serious side effects—seek medical attention promptly if you experience:
- Fainting or severe dizziness.
- Difficulty breathing or wheezing.
- Swelling of the face, lips, tongue, or throat (possible allergic reaction).
- Very slow heartbeat with symptoms such as confusion or severe weakness.
- Chest pain that is new or worsening.
Important precautions
- Do not stop metoprolol suddenly. Abruptly stopping it can increase the risk of chest pain, abnormal heart rhythms, or heart attack in some people. If it needs to be stopped, your healthcare provider will usually recommend tapering the dose gradually.
- Take it exactly as prescribed.
- If you miss a dose, follow your healthcare provider’s instructions or the medication guide.
If you’re taking metoprolol and are concerned about side effects, it’s a good idea to discuss them with your healthcare provider. They can determine whether the symptoms are related to the medication and whether your dose or treatment plan should be adjusted.
