10 Important Side Effects of Metoprolol to Know
Metoprolol is a beta-blocker commonly used for high blood pressure, angina, certain abnormal heart rhythms, and some forms of heart failure. Many people tolerate it well, but side effects are possible.
Common side effects
-
Tiredness or fatigue — especially when starting treatment or increasing the dose.
-
Dizziness or lightheadedness — particularly when standing up.
-
Slow heartbeat (bradycardia) — metoprolol intentionally lowers heart rate, but it can sometimes become too slow.
-
Low blood pressure — which may cause weakness or faintness.
-
Cold hands and feet — reduced circulation to the extremities can produce this sensation.
-
Shortness of breath or reduced exercise tolerance — some people notice decreased stamina.
-
Sleep disturbances or vivid dreams — these can occur in some people taking beta-blockers.
-
Depressed mood — mood changes have been reported, although they aren’t experienced by everyone.
-
Nausea or stomach upset — usually mild when it occurs.
-
Sexual difficulties — decreased libido or erectile difficulties can occur in some people.
🚨 When to seek medical attention
Contact a healthcare professional promptly for fainting, a very slow or irregular heartbeat, significant breathing difficulty, swelling of the legs, or worsening chest pain.
Metoprolol can also mask some warning symptoms of low blood sugar, particularly a rapid heartbeat. People with diabetes should be aware of this.
Don’t stop metoprolol suddenly
This is particularly important if you’re taking it for heart disease. Abruptly stopping a beta-blocker can cause a rebound increase in heart rate and blood pressure and may worsen angina or increase cardiovascular risk. Your prescriber can taper it when discontinuation is appropriate.
If you’re experiencing a particular symptom while taking metoprolol, tell me your dose, how long you’ve been taking it, and the symptom, and I can explain whether it’s a recognized side effect and what to discuss with your doctor.
