If you’re referring to the headline “10 Metoprolol Side Effects That Are Often Overlooked,” metoprolol is a beta blocker commonly prescribed for high blood pressure, angina, certain abnormal heart rhythms, and heart failure. The headline is a little sensational: many of these effects are recognized and listed in standard prescribing information.
10 possible side effects
- Tiredness or low energy — especially when starting treatment or after increasing the dose.
- Dizziness or lightheadedness — particularly if blood pressure becomes too low.
- Slow heart rate (bradycardia) — metoprolol intentionally slows the heart, but an excessively slow rate can be problematic.
- Cold hands and feet — reduced peripheral circulation can make extremities feel cold.
- Sleep problems or vivid dreams — some people report insomnia or unusual dreams.
- Depressed mood — mood changes have been reported, although the relationship isn’t always straightforward.
- Shortness of breath or wheezing — more concerning in people with asthma or other airway disease.
- Digestive symptoms — nausea, diarrhea, constipation, or abdominal discomfort can occur.
- Sexual difficulties — reduced libido or erectile difficulties may occur in some people.
- Low blood sugar symptoms may be masked — particularly important for people with diabetes, because beta blockers can make warning signs such as a racing heartbeat less noticeable.
When to get medical help
Seek urgent medical attention for fainting, severe dizziness, very slow or irregular heartbeat, significant breathing difficulty, swelling with worsening shortness of breath, or signs of a serious allergic reaction.
And don’t abruptly stop metoprolol. Suddenly discontinuing a beta blocker can cause a dangerous rebound in heart rate or blood pressure and may increase the risk of heart problems. Your prescriber can taper it when appropriate.
If you tell me whether you’re taking metoprolol tartrate or succinate and the dose (for example, 25 mg, 50 mg, or 100 mg), plus what symptom you’re concerned about, I can explain how likely it is to be related to the medication.
