That headline is clickbait-y and designed to scare you more than inform you. Metoprolol is a widely used beta-blocker (for blood pressure, angina, heart rhythm control), and most people tolerate it well—though like any medication, it can cause side effects.
Here are 10 possible side effects of metoprolol, ranging from common to less common but important:
First, a quick context: Metoprolol works by slowing the heart rate and reducing the heart’s workload. That’s helpful medically—but it also explains most of its side effects.
1. Fatigue or tiredness
One of the most common effects. Because it slows your heart rate, you may feel less energetic, especially when starting or increasing the dose.
2. Dizziness or lightheadedness
Often happens when standing up quickly due to lower blood pressure.
3. Slow heart rate (bradycardia)
The drug’s intended effect can sometimes go a bit too far, causing an unusually low pulse.
4. Cold hands and feet
Reduced circulation to extremities is fairly typical with beta-blockers.
5. Shortness of breath (in some people)
More likely if someone has underlying asthma or reactive airway disease.
6. Sleep disturbances or vivid dreams
Some people report unusual dreams or trouble sleeping.
7. Depression or mood changes (uncommon but possible)
Evidence is mixed, but mood changes are reported in a minority of patients.
8. Sexual dysfunction
Lower libido or erectile difficulties can occur in some individuals.
9. Gastrointestinal issues
Nausea, diarrhea, or mild stomach discomfort can happen, especially early on.
10. Worsening asthma symptoms (important warning)
Metoprolol is “cardioselective,” but at higher doses it can still affect airway receptors in sensitive people.
When to contact a doctor urgently
- Fainting or severe dizziness
- Very slow heart rate with symptoms (weakness, confusion)
- Shortness of breath or wheezing
- Swelling of face/lips (rare allergic reaction)
The reality check
Most people on metoprolol experience few or mild side effects, and many have none at all. The medication is prescribed because its benefits for heart protection and blood pressure control usually outweigh these risks.
If you want, tell me your dose or why it was prescribed—I can explain what side effects are most likely in your specific situation, which is usually more useful than generic lists.