Here are the 10 most commonly reported side effects:
1) Fatigue or tiredness
One of the most frequent effects. Because metoprolol slows the heart rate and reduces blood pressure, you may feel less energetic, especially at first.
2) Dizziness or lightheadedness
Often happens when standing up quickly (orthostatic hypotension). This is due to lowered blood pressure.
3) Slow heart rate (bradycardia)
Metoprolol intentionally slows the heart, but sometimes it can slow it too much, leading to weakness or dizziness.
4) Cold hands and feet
Reduced circulation to extremities can cause a persistent feeling of coldness.
5) Shortness of breath (rare but important)
More likely in people with asthma or COPD, because beta-blockers can sometimes affect airway function.
6) Sleep disturbances or vivid dreams
Some people report insomnia, unusual dreams, or restless sleep—especially with lipophilic beta-blockers like metoprolol.
7) Depression or mood changes
Not extremely common, but some patients notice low mood or emotional flattening.
8) Sexual dysfunction
Reduced libido or difficulty with sexual performance can occur due to blood pressure and nervous system effects.
9) Cold sweats or mild sweating changes
Some people notice changes in how they sweat, especially during activity or stress.
10) Digestive symptoms
Nausea, stomach discomfort, diarrhea, or constipation may occur in some users.
When to contact a doctor urgently
Seek medical advice if you experience:
- Very slow pulse (especially with fainting)
- Severe dizziness or fainting
- Worsening shortness of breath
- Swelling of ankles or sudden weight gain
- Chest pain that worsens
Key takeaway
Most people tolerate metoprolol well, and side effects are often dose-related or temporary. It should not be stopped suddenly without medical supervision, because that can cause rebound heart issues.
If you want, tell me your dose and symptoms—you can usually adjust timing, dose, or formulation to reduce side effects significantly.
