The headline is partly reasonable but somewhat sensationalized. Like all medications, Metoprolol can cause side effects, but many people take it safely and benefit from it. The important point is to recognize possible side effects—not to stop taking it without medical advice.
Some side effects that can occur include:
- Fatigue or tiredness – One of the more common side effects, especially when starting treatment.
- Slow heart rate (bradycardia) – The medication is designed to slow the heart, but in some people it may slow it too much.
- Dizziness or lightheadedness – Often related to lowered blood pressure, particularly when standing up quickly.
- Cold hands and feet – Reduced blood flow to the extremities can occur.
- Shortness of breath or wheezing – More likely in people with asthma or certain other lung conditions, although metoprolol is generally more selective than some other beta blockers.
- Sleep changes – Some people report vivid dreams or insomnia.
- Depressed mood or mood changes – This has been reported, but the relationship is not clear and doesn’t affect everyone.
- Sexual dysfunction – Reduced libido or erectile dysfunction can occur in some people.
- Digestive symptoms – Nausea, diarrhea, or constipation are possible.
- Masking symptoms of low blood sugar – In people with diabetes, metoprolol can make it harder to notice signs such as a rapid heartbeat during Hypoglycemia.
When to seek medical attention
Contact a healthcare professional promptly if you experience:
- Fainting or severe dizziness
- Very slow heartbeat
- Chest pain that is new or worsening
- Difficulty breathing
- Swelling of the face, lips, or tongue (possible allergic reaction)
Don’t stop metoprolol suddenly
If you’re taking metoprolol for high blood pressure, angina, heart failure, or another heart condition, do not stop it abruptly unless instructed by your healthcare provider. Stopping suddenly can cause a rebound increase in heart rate and blood pressure and may increase the risk of chest pain or even a heart attack in some people.
Bottom line
Metoprolol has well-known potential side effects, but the benefits often outweigh the risks when it’s prescribed appropriately. If you think you’re experiencing side effects, talk with the clinician who prescribed it—they can determine whether your symptoms are related to the medication and whether your dose or treatment should be adjusted.
