Metoprolol: “The Good, The Bad, and The Ugly” is a dramatic way to describe a medicine that is actually widely used and well studied. Metoprolol is a beta blocker that reduces the effects of adrenaline on the heart, helping slow heart rate and lower blood pressure.
It is commonly prescribed for:
- High blood pressure (hypertension)
- Angina (chest pain caused by reduced blood flow to the heart)
- Heart failure (certain types)
- After a heart attack, to reduce strain on the heart
- Certain fast or irregular heart rhythms
10 common side effects of metoprolol
- Tiredness or low energy
- Because it slows the heart rate and reduces adrenaline effects, some people feel more fatigued, especially when starting treatment.
- Dizziness or light-headedness
- More likely when standing up quickly or if blood pressure becomes too low.
- Slow heartbeat (bradycardia)
- A slower heart rate is an intended effect, but an unusually slow pulse may need medical review.
- Cold hands and feet
- Reduced circulation to the extremities can cause this sensation.
- Sleep changes or vivid dreams
- Some people report disturbed sleep or unusual dreams.
- Sexual side effects
- Some people experience reduced libido or erectile difficulties.
- Weight changes
- Some people notice mild weight gain, though this is not universal and can have many causes.
- Mood changes
- Rarely, people report low mood or feeling less energetic.
- Digestive symptoms
- Nausea, diarrhoea, or stomach discomfort can occur.
- Shortness of breath or reduced exercise tolerance
- Some people notice they cannot exercise at the same intensity, particularly when first starting.
Less common but important warning signs
Seek medical advice if you experience:
- Fainting or severe dizziness
- Very slow heartbeat with symptoms
- New or worsening shortness of breath, wheezing, or swelling
- Chest pain that is new or worsening
- Signs of a serious allergic reaction
Important: don’t stop suddenly
Stopping metoprolol abruptly can cause a rebound increase in heart rate and blood pressure and may be dangerous, especially in people taking it for heart disease. Dose changes should be discussed with a healthcare professional.
