Metoprolol is a beta-blocker commonly prescribed for high blood pressure, angina (chest pain), certain heart rhythm problems, heart failure, and after some heart attacks. Like all medicines, it can cause side effects, although many people take it without major problems.
Here are 10 metoprolol side effects that may be overlooked:
1. Fatigue and low energy
- Feeling unusually tired is one of the more common effects.
- It may improve as your body adjusts, but persistent fatigue should be discussed with your clinician.
2. Dizziness or lightheadedness
- Metoprolol can lower heart rate and blood pressure.
- This may be more noticeable when standing up quickly.
3. Slow heartbeat (bradycardia)
- A lower heart rate is an intended effect for many patients, but an overly slow pulse can cause:
- Weakness
- Fainting
- Extreme tiredness
4. Cold hands and feet
- Reduced circulation to the extremities can make fingers and toes feel colder.
5. Sleep changes or vivid dreams
- Some people report:
- Trouble sleeping
- Unusual or vivid dreams
- Nighttime restlessness
6. Mood changes
- A small number of people report feeling more depressed, less motivated, or experiencing mood changes.
7. Sexual side effects
- Some people may experience reduced libido or erectile difficulties.
8. Exercise intolerance
- Because metoprolol slows the heart rate response to activity, some people notice they cannot reach their usual exercise intensity as easily.
9. Digestive symptoms
Possible effects include:
- Nausea
- Diarrhea or constipation
- Stomach discomfort
10. Masking symptoms of low blood sugar
- In people with diabetes, beta-blockers may hide warning signs of low blood sugar, especially a fast heartbeat.
Important safety points
- Do not stop metoprolol suddenly unless instructed by a healthcare professional. Abrupt stopping can worsen chest pain or increase heart risks in some people.
- Contact a healthcare professional if you experience fainting, severe shortness of breath, chest pain, a very slow heartbeat, or swelling that is new or worsening.
If you take metoprolol, the dose (for example 25 mg, 50 mg, or 100 mg), why it was prescribed, and your other medications can change which side effects matter most.
