Metoprolol is a beta-blocker commonly prescribed for conditions such as high blood pressure, chest pain (angina), heart rhythm problems, and heart failure. It works by slowing the heart rate and reducing the heart’s workload.
Many people take metoprolol without major problems, but like all medicines, it can cause side effects. The likelihood and severity can vary depending on the dose, formulation (such as immediate-release or extended-release), and individual health factors.
10 Common Side Effects of Metoprolol
- Tiredness or fatigue
- Feeling more tired than usual is one of the most frequently reported effects, especially when starting treatment.
- Dizziness or lightheadedness
- This can happen because metoprolol lowers blood pressure and slows heart rate.
- Slow heartbeat (bradycardia)
- A slower pulse is an expected effect, but an unusually low heart rate may need medical review.
- Cold hands and feet
- Reduced circulation to the extremities can cause a sensation of coldness.
- Low blood pressure (hypotension)
- Symptoms may include dizziness, weakness, or faintness, particularly when standing up quickly.
- Sleep changes
- Some people report trouble sleeping, vivid dreams, or changes in sleep patterns.
- Gastrointestinal symptoms
- Nausea, diarrhea, stomach discomfort, or constipation may occur.
- Shortness of breath or reduced exercise tolerance
- Some people notice they tire more easily during physical activity.
- Mood changes
- Less commonly, people may experience low mood or changes in emotional well-being.
- Sexual side effects
- Some people report reduced libido or erectile difficulties while taking beta-blockers.
Important Safety Notes
- Do not stop metoprolol suddenly unless your healthcare provider tells you to. Abruptly stopping it can worsen some heart conditions.
- Seek medical advice if you experience fainting, severe dizziness, chest pain, worsening shortness of breath, swelling, confusion, or a very slow heartbeat.
- People with asthma, certain heart rhythm conditions, diabetes, or circulation problems may need special monitoring while taking beta-blockers.
If you are taking metoprolol and notice a new symptom, it is useful to consider when it started, your dose, other medications, and whether the symptom improves or worsens after taking the medication—this information can help your clinician assess whether metoprolol may be contributing.
