Metoprolol: 10 Possible Side Effects and When to Seek Medical Care
Metoprolol is a beta blocker commonly prescribed for high blood pressure, angina (chest pain), heart failure, and certain abnormal heart rhythms. Many people take it safely, but it can cause side effects.
Common side effects
- Tiredness or fatigue
- Often improves after your body adjusts to the medication.
- Dizziness or lightheadedness
- May occur, especially when standing up quickly.
- Slow heart rate (bradycardia)
- Metoprolol is designed to slow the heart, but it can sometimes slow it too much.
- Cold hands and feet
- Reduced blood flow to the extremities may cause this.
- Low blood pressure
- Can cause weakness, dizziness, or fainting.
- Shortness of breath
- People with asthma or certain lung conditions may notice worsening breathing symptoms.
- Sleep changes
- Some people report vivid dreams or difficulty sleeping.
- Digestive upset
- Nausea, diarrhea, or constipation can occur.
- Mood changes
- Depression or mood changes have been reported, although they are not common.
- Reduced exercise tolerance
- Because metoprolol slows the heart rate, strenuous exercise may feel more difficult.
When to contact your doctor promptly
Call your healthcare professional if you develop:
- A very slow heart rate or feel faint
- Persistent dizziness or repeated fainting
- New or worsening shortness of breath
- Swelling of the legs or rapid weight gain
- Symptoms that are severe or do not improve
Seek emergency medical care immediately if you have:
- Chest pain that is severe or doesn’t go away
- Difficulty breathing or severe wheezing
- Swelling of the face, lips, tongue, or throat
- Loss of consciousness
Important reminders
- Do not stop metoprolol suddenly. Abruptly stopping it can cause a rebound increase in heart rate and blood pressure and may increase the risk of chest pain or a heart attack in some people.
- Take it exactly as prescribed.
- Check your blood pressure and pulse if your healthcare professional recommends it.
Bottom line: Metoprolol is an effective medication that helps many people manage heart and blood pressure conditions. Most side effects are mild or improve over time, but severe dizziness, fainting, significant breathing problems, or signs of an allergic reaction require prompt medical attention. If you experience side effects, speak with your healthcare professional before making any changes to your medication.
