Beta blockers can reduce blood flow to the extremities, making fingers and toes feel unusually cold.
This is usually not dangerous, but persistent pain, major color changes, or worsening circulation problems should be discussed with a doctor.
6. Shortness of Breath or Wheezing
Metoprolol mainly acts on beta-1 receptors in the heart, but at higher doses it can also affect receptors in the lungs.
People with asthma or other breathing conditions may be more sensitive.
Seek medical advice if you develop:
new wheezing
increasing shortness of breath
chest tightness
difficulty breathing
Severe breathing difficulty requires urgent medical attention.
7. Sleep Problems or Unusual Dreams
Some people taking metoprolol report changes in sleep, including:
difficulty sleeping
vivid dreams
nightmares
restless sleep
These effects are not experienced by everyone and may improve over time.
If sleep disruption becomes severe or affects daily functioning, speak with your healthcare provider.
8. Depression or Mood Changes
Changes in mood have sometimes been reported by people taking beta blockers.
