The 10 Metoprolol Side Effects You Should Know
Metoprolol is a beta blocker commonly prescribed for high blood pressure, certain heart-rhythm problems, angina, and some forms of heart failure. Most people tolerate it well, but it can cause side effects. The sensational claim that doctors are “praying you don’t discover” them is misleading.
1. Tiredness
Fatigue or reduced energy is one of the more common effects. Because metoprolol slows the heart rate and reduces the effects of adrenaline, some people feel less energetic, particularly when first starting treatment.
2. Dizziness
Lower blood pressure or a slower heart rate can make some people feel dizzy or light-headed, especially when standing up quickly.
3. Slow Heart Rate
Metoprolol deliberately slows the heart rate. A heart rate that becomes unusually slow, particularly when accompanied by dizziness, fainting, weakness, or shortness of breath, should be discussed with a healthcare professional.
4. Cold Hands and Feet
Reduced circulation to the extremities can make the hands and feet feel colder than usual.
5. Sleep Disturbances
Some people report difficulty sleeping, vivid dreams, or nightmares while taking beta blockers. These symptoms aren’t experienced by everyone.
6. Depression or Mood Changes
Mood changes have been reported with beta blockers, although the relationship isn’t always straightforward. Persistent or significant changes in mood should be discussed with your doctor.
7. Shortness of Breath
Metoprolol can occasionally cause breathing problems, particularly in susceptible people. It is important to distinguish a medication effect from worsening heart disease or another medical problem.
8. Sexual Side Effects
Some people may experience reduced libido or erectile difficulties while taking beta blockers. However, cardiovascular disease, diabetes, age, stress, and many other factors can also contribute.
9. Low Blood Pressure
Because metoprolol lowers blood pressure, some people may develop hypotension. Symptoms can include dizziness, weakness, blurred vision, or fainting.
10. Blood-Sugar Warning Symptoms May Be Less Obvious
Beta blockers can mask some symptoms of low blood sugar, particularly a rapid heartbeat. This is especially important for people using insulin or certain diabetes medications. Metoprolol does not eliminate all warning signs of hypoglycemia, but patients with diabetes should be aware of this issue.
Don’t Stop Metoprolol Suddenly
This is particularly important. Stopping metoprolol abruptly can cause serious problems, including worsening angina, increased heart rate or blood pressure, and potentially heart complications in susceptible patients.
If you want to stop or change the dose, speak with your prescriber about how to do it safely.
When to Seek Urgent Help
Seek immediate medical attention for fainting, severe difficulty breathing, severe chest pain, or a serious allergic reaction.
Bottom Line
Metoprolol has real potential side effects, but it is also an important and effective medication for many heart conditions. The appropriate response to a side effect is not automatically to stop the medication—your doctor or pharmacist can determine whether the symptom is medication-related and whether the dose or treatment needs adjustment.
