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.
Possible symptoms may include:
low mood
loss of interest
unusual sadness
changes in motivation
However, depression is common and can have many causes, so it should not automatically be attributed to metoprolol.
Persistent or significant mood changes should be discussed with a healthcare professional.
9. Sexual Side Effects
Some people may experience sexual difficulties while taking metoprolol.
These can include:
reduced sexual desire
difficulty getting or maintaining an erection
changes in sexual performance
Heart disease, high blood pressure, stress, diabetes, and other medications can also contribute to these symptoms.
If sexual side effects are affecting quality of life, a doctor may be able to adjust treatment safely.
10. Changes in Blood Sugar Warning Signs
Metoprolol can
make certain symptoms of low blood sugar less noticeable, especially a rapid heartbeat.
This can be particularly important for people with diabetes who use insulin or other glucose-lowering medications.
Other signs of low blood sugar, such as sweating, weakness, confusion, or shakiness, may still occur.
People with diabetes should follow their usual blood glucose monitoring plan and discuss any concerns with their healthcare team.
A Rare but Serious Concern: Worsening Heart Failure Symptoms
Metoprolol is often used to treat certain forms of heart failure, but symptoms can occasionally worsen, particularly during dose changes or if the medicine is not tolerated.
Contact a healthcare professional promptly if you develop:
