Metoprolol: 10 common side effects and what to know
Metoprolol is a beta-blocker commonly prescribed for conditions such as high blood pressure, chest pain (angina), certain heart rhythm problems, and heart failure. It works by slowing the heart rate and reducing the heart’s workload.
Like all medicines, it can cause side effects. Many are mild and improve as the body adjusts, but some require medical attention.
10 common side effects of metoprolol
- Tiredness or fatigue
- Because metoprolol slows the heart rate and reduces adrenaline effects, some people feel more tired, especially when starting treatment.
- Dizziness or lightheadedness
- This may occur, particularly when standing up quickly, due to lower blood pressure.
- Slow heartbeat
- A lower resting heart rate is an expected effect, but an unusually slow pulse with symptoms should be discussed with a healthcare professional.
- Cold hands and feet
- Reduced circulation to the extremities can cause feelings of coldness.
- Sleep changes or vivid dreams
- Some people report unusual dreams or changes in sleep patterns.
- Digestive symptoms
- Nausea, diarrhea, constipation, or stomach discomfort can occur.
- Shortness of breath or reduced exercise tolerance
- Some people notice they tire more easily during physical activity.
- Mood changes
- Less commonly, people report low mood or changes in emotional well-being.
- Sexual side effects
- Some people experience changes in sexual function, although many other factors can contribute.
- Weight changes
- Small changes in weight can occur in some people, though this is not experienced by everyone.
Seek medical advice promptly if you experience:
- Fainting or severe dizziness
- Very slow heartbeat with weakness or confusion
- New or worsening shortness of breath
- Swelling of the legs or sudden weight gain
- Signs of an allergic reaction
Important reminders
- Do not stop metoprolol suddenly unless instructed by your clinician. Stopping abruptly can worsen certain heart conditions.
- Metoprolol affects heart rate and blood pressure, so regular monitoring may be recommended.
- Side effects can vary depending on the dose, the reason it is prescribed, and other medications being taken.
If you take metoprolol, sharing your dose (for example, 25 mg, 50 mg, 100 mg), why it was prescribed, and any symptoms you’re noticing can help put side effects into context.
