10 Metoprolol Side Effects You Should Know About
Metoprolol is a beta blocker commonly prescribed for high blood pressure, angina, certain abnormal heart rhythms, heart failure, and after some heart attacks. Like all medicines, it can cause side effects, although many people take it without significant problems.
Here are 10 effects worth knowing:
- Tiredness or fatigue — one of the more commonly reported effects, particularly when starting treatment.
- Dizziness or lightheadedness — especially if blood pressure or heart rate becomes too low.
- Slow heartbeat (bradycardia) — metoprolol intentionally lowers heart rate, but an excessively slow pulse can be problematic.
- Cold hands and feet — reduced circulation to the extremities can make them feel unusually cold.
- Headache — can occur, particularly during the adjustment period.
- Sleep disturbances or vivid dreams — some people report changes in sleep while taking beta blockers.
- Nausea or stomach discomfort — gastrointestinal symptoms can occur.
- Shortness of breath or wheezing — uncommon, but more important in people with asthma or other airway disease.
- Depressed mood or reduced energy — mood changes have been reported, although the relationship with beta blockers varies between individuals.
- Sexual difficulties — reduced libido or erectile difficulties can occur in some people.
When should you get medical help?
Contact your doctor or pharmacist if you develop persistent dizziness, fainting, unusually slow or irregular heartbeat, worsening shortness of breath, swelling, or symptoms that are interfering with daily life.
Severe breathing difficulty, fainting, or serious chest symptoms require urgent medical attention.
One important warning: don’t stop metoprolol suddenly
If you’ve been taking metoprolol regularly, don’t abruptly discontinue it unless a healthcare professional tells you to. Suddenly stopping a beta blocker can cause a dangerous rebound increase in heart rate and blood pressure and may worsen angina or increase cardiovascular risk.
Also, don’t assume every new symptom is caused by metoprolol. The reason you’re taking the medicine—and other medications or medical conditions—can produce similar symptoms.
Bottom line: Metoprolol can cause fatigue, dizziness, a slow pulse, cold extremities, and several other effects, but many people tolerate it well. The right response to troublesome side effects is usually a medication review with your healthcare professional, not stopping the drug on your own.
