Metoprolol is a beta blocker commonly prescribed for high blood pressure, certain heart rhythm problems, angina, and heart failure. Many people tolerate it well, but some side effects don’t get discussed as often as the more familiar ones.
Here are 10 side effects that may be overlooked:
- Fatigue or low energy
- One of the most common complaints.
- Some people feel less energetic, especially when starting treatment or after a dose increase.
- Exercise intolerance
- Metoprolol slows the heart rate, which can make intense exercise feel harder than before.
- Dizziness or lightheadedness
- Especially when standing up quickly or when blood pressure drops more than expected.
- Cold hands and feet
- Reduced circulation to the extremities can make some people feel unusually cold.
- Sleep disturbances
- Some patients report vivid dreams, insomnia, or changes in sleep quality.
- Mood changes
- Low mood, reduced motivation, or feeling emotionally “flat” can occur, although this is not common.
- Sexual side effects
- Some people experience reduced libido or erectile difficulties.
- Digestive symptoms
- Nausea, stomach discomfort, diarrhea, or constipation may occur.
- Masking signs of low blood sugar
- In people with diabetes, metoprolol can make symptoms such as a racing heartbeat less noticeable during hypoglycemia.
- Slow heart rate (bradycardia)
- A lower heart rate is expected, but if it becomes too slow it can cause fatigue, dizziness, or fainting.
When to contact a doctor
Seek medical advice promptly if you experience:
- Fainting or near-fainting
- Severe dizziness
- Shortness of breath that is new or worsening
- Swelling that worsens significantly
- A very slow heart rate with symptoms
- Chest pain or other concerning symptoms
Important note
Never stop metoprolol suddenly unless instructed by your doctor. Abrupt discontinuation can sometimes cause rebound increases in heart rate or blood pressure and may worsen heart-related conditions.
If you’re taking metoprolol and have noticed a specific symptom, I can help you understand whether it could be related to the medication and what questions to ask your healthcare provider.
