Metoprolol is a beta blocker commonly prescribed for conditions such as high blood pressure, angina, heart rhythm problems, and heart failure. Many people take it safely, but like any medication it can cause side effects. Some are subtle and may be overlooked.
10 possible metoprolol side effects to know about
- Tiredness or low energy
- Because metoprolol slows the heart rate and reduces the effect of adrenaline, some people notice fatigue, especially after starting treatment or increasing the dose.
- Dizziness or lightheadedness
- This may happen when blood pressure drops, particularly when standing up quickly.
- Slower heartbeat (bradycardia)
- A lower heart rate is an intended effect, but an unusually slow pulse can cause weakness, dizziness, or fainting.
- Cold hands and feet
- Reduced circulation to the extremities can make some people feel unusually cold.
- Sleep changes or vivid dreams
- Some people report insomnia, restless sleep, or unusual dreams.
- Shortness of breath or reduced exercise tolerance
- Some people may feel less able to exercise, though new or worsening breathing problems should be checked.
- Mood changes
- Rarely, people report low mood or changes in emotional well-being.
- Digestive symptoms
- Nausea, diarrhea, constipation, or stomach discomfort can occur.
- Sexual side effects
- Some people experience reduced libido or erectile difficulties.
- Masking symptoms of low blood sugar
- In people with diabetes, beta blockers can hide warning signs of hypoglycemia, such as a racing heartbeat.
Seek medical advice promptly if you experience:
- Fainting or severe dizziness
- Very slow heartbeat with symptoms
- New or worsening shortness of breath
- Chest pain
- Swelling of the legs or sudden weight gain
Do not stop metoprolol suddenly unless instructed by a healthcare professional. Abruptly stopping beta blockers can cause a dangerous increase in heart rate or blood pressure and may worsen certain heart conditions.
If you take metoprolol and are noticing symptoms, the dose, reason it was prescribed, how long you’ve taken it, and your other medications can all affect whether a side effect is likely.
