Metoprolol: 10 Side Effects and When to Contact Your Doctor
Metoprolol is a commonly prescribed beta-blocker used to help manage conditions such as high blood pressure, chest pain (angina), certain heart rhythm problems, heart failure, and recovery after some heart attacks. It works by slowing the heart rate and reducing the heart’s workload.
Many people take metoprolol without serious problems, but it can cause side effects.
10 Possible Side Effects of Metoprolol
1. Tiredness and low energy
Feeling more fatigued than usual is one of the most commonly reported effects, especially when starting treatment.
2. Dizziness or lightheadedness
This may happen because metoprolol lowers blood pressure and slows the heart rate.
3. Slow heartbeat
A slower pulse is an expected effect, but an unusually slow heartbeat with symptoms should be checked.
4. Cold hands and feet
Reduced circulation to the extremities can make hands and feet feel colder.
5. Sleep problems or vivid dreams
Some people notice changes in sleep patterns after starting a beta-blocker.
6. Digestive issues
Possible symptoms include:
- Nausea
- Diarrhea
- Constipation
- Stomach discomfort
7. Shortness of breath or reduced exercise tolerance
Some people feel they tire more quickly during physical activity.
8. Mood changes
A small number of people report changes in mood, including feeling unusually down or less motivated.
9. Sexual side effects
Some people may experience changes in sexual function or desire.
10. Changes in blood sugar warning signs
In people with diabetes, metoprolol may make some symptoms of low blood sugar—especially a fast heartbeat—less noticeable.
Get Medical Advice Quickly If You Notice:
🚨 Call a healthcare professional promptly for:
- Fainting or severe dizziness
- Very slow heartbeat
- New or worsening shortness of breath
- Swelling in the legs or sudden weight gain
- Chest pain that is new, severe, or worsening
- Signs of an allergic reaction (such as swelling of the face, lips, or throat
