Metoprolol is a beta blocker commonly prescribed for conditions such as high blood pressure, angina, certain heart rhythm problems, heart failure, and after a heart attack.
Like all medicines, metoprolol can cause side effects. Many are mild and improve as the body adjusts, while others deserve medical attention. The risk can depend on the dose, the condition being treated, other medications, and your overall health.
Here are 10 important side effects to know about.
1. Tiredness and Low Energy
Fatigue is one of the more commonly reported side effects of metoprolol.
Because the medicine slows the heart rate and reduces the heart’s workload, some people may feel:
unusually tired
less energetic
weaker during physical activity
sleepy during the day
These symptoms may improve after the first days or weeks of treatment. If fatigue is severe or persistent, speak with your healthcare professional.
2. Dizziness or Lightheadedness
Metoprolol can lower blood
pressure and slow the heart rate, which may sometimes cause dizziness.
This may be more noticeable when:
standing up quickly
getting out of bed
exercising
starting treatment or increasing the dose
Standing up slowly can help reduce lightheadedness. Severe dizziness, fainting, or repeated near-fainting should be medically evaluated.
3. Slow Heart Rate
A slower pulse is an expected effect of beta blockers, but in some people the heart rate can become too slow.
Possible symptoms include:
weakness
dizziness
unusual fatigue
fainting
shortness of breath
Do not change your dose based only on your pulse without medical advice. If you have symptoms together with a very slow heart rate, contact a healthcare professional promptly.
4. Low Blood Pressure
Metoprolol may lower blood pressure more than intended in some people.
Signs of low blood pressure can include:
dizziness
blurred vision
weakness
confusion
feeling faint
The risk may be greater when metoprolol is
combined with other blood pressure medicines.
5. Cold Hands and Feet
Some people notice colder hands or feet while taking metoprolol.
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.
