Metoprolol is a beta-blocker commonly used for high blood pressure, angina, certain heart-rhythm problems, and after a heart attack. Side effects can vary with the dose and formulation (metoprolol tartrate vs. succinate).
10 important side effects of metoprolol
-
Slow heartbeat (bradycardia) — Your pulse may become slower than usual.
-
Low blood pressure — This can cause light-headedness or weakness, particularly when standing up.
-
Dizziness — Often more noticeable when first starting treatment or after a dose increase.
-
Tiredness or weakness — Reduced heart rate can make some people feel unusually fatigued.
-
Cold hands and feet — Reduced circulation to the extremities can cause this sensation.
-
Shortness of breath — Metoprolol can sometimes worsen breathing problems, particularly in people with asthma or certain lung conditions.
-
Sleep problems or vivid dreams — Some people report insomnia or unusual dreams.
-
Depressed mood or mental changes — Mood changes can occur, although they are not among the most common effects.
-
Sexual problems — Decreased libido or erectile dysfunction can occur in some people taking beta-blockers.
-
Low blood sugar warning symptoms may be masked — In people with diabetes, metoprolol can make warning signs such as a fast heartbeat less noticeable.
Seek medical attention promptly if
You develop fainting, severe dizziness, difficulty breathing, swelling, a very slow or irregular heartbeat, or symptoms of a serious allergic reaction.
Important: Don’t suddenly stop metoprolol unless your clinician tells you to. Abrupt withdrawal can cause a dangerous increase in heart rate or blood pressure and may worsen angina or increase the risk of heart problems.
If you tell me your metoprolol dose (e.g., 25 mg, 50 mg, 100 mg), whether it’s tartrate or succinate, and why you’re taking it, I can explain which side effects are most relevant to you.
