Metoprolol is a beta-blocker commonly prescribed for conditions such as high blood pressure, angina (chest pain), certain heart rhythm problems, and heart failure. It works by slowing the heart rate and reducing the workload on the heart.
Many people tolerate metoprolol well, but like all medicines, it can cause side effects. Here are 10 common side effects to be aware of:
1. Tiredness or low energy
- Feeling unusually fatigued is one of the most commonly reported effects.
- It may improve as your body adjusts to the medication.
2. Dizziness or lightheadedness
- Metoprolol can lower blood pressure and slow heart rate, which may cause dizziness, especially when standing up quickly.
3. Slow heartbeat (bradycardia)
- Because it reduces heart rate, some people may notice a slower pulse.
- A very slow heartbeat with fainting or severe weakness needs medical attention.
4. Cold hands and feet
- Reduced circulation to the extremities can make fingers and toes feel colder.
5. Sleep changes or unusual dreams
- Some people report trouble sleeping, vivid dreams, or changes in sleep patterns.
6. Shortness of breath or reduced exercise tolerance
- Some people feel they tire more easily during physical activity.
- New or worsening breathing problems should be checked.
7. Digestive symptoms
Possible symptoms include:
- Nausea
- Diarrhea
- Constipation
- Stomach discomfort
8. Weight changes
- Some people notice weight gain, often related to changes in activity level, fluid balance, or appetite.
9. Mood changes
- Less commonly, people report low mood or changes in emotional well-being.
10. Sexual side effects
- Some people may experience reduced sexual desire or difficulty with sexual function.
Important things to know
- Do not stop metoprolol suddenly unless your healthcare provider tells you to. Stopping abruptly can worsen some heart conditions and may cause serious problems.
- Tell your doctor if you have asthma, diabetes, very slow heart rate, or circulation problems, as metoprolol may require special monitoring.
- If you have diabetes, beta-blockers can sometimes mask warning signs of low blood sugar, such as a fast heartbeat.
Seek medical advice urgently if you experience:
- Fainting
- Severe difficulty breathing
- Chest pain that is new or worsening
- Swelling of the legs with sudden weight gain
- A very slow or irregular heartbeat with symptoms
If you are taking metoprolol and have noticed a specific symptom, it can help to know your dose, how long you have been taking it, and what condition it was prescribed for.
