10 possible side effects of metoprolol
1. Tiredness or low energy
Because metoprolol slows the heart rate and reduces the effects of adrenaline, some people feel more fatigued, especially early in treatment.
2. Dizziness or lightheadedness
This may happen when blood pressure drops, particularly when standing up quickly.
3. Slow heartbeat (bradycardia)
A lower heart rate is an expected effect, but a very slow pulse may need medical review.
4. Cold hands and feet
Reduced circulation to the extremities can make some people feel colder.
5. Sleep changes or vivid dreams
Some people report unusual dreams or changes in sleep patterns.
6. Shortness of breath or reduced exercise tolerance
Some people notice they tire more easily during activity.
7. Digestive symptoms
Possible effects include:
- Nausea
- Diarrhea
- Constipation
- Stomach discomfort
8. Mood changes
Less commonly, people report low mood or changes in emotional well-being.
9. Sexual side effects
Some people experience changes in sexual function while taking beta-blockers.
10. Blood sugar warning signs may be harder to notice
In people with diabetes, metoprolol may mask some symptoms of low blood sugar, such as a fast heartbeat.
Contact a healthcare professional promptly if you notice:
- Fainting or severe dizziness
- Very slow or irregular heartbeat
- New or worsening shortness of breath
- Swelling of the legs or sudden weight gain
- Chest pain
- Severe allergic reaction (swelling, trouble breathing, widespread rash)
Important: do not stop metoprolol suddenly
Stopping it abruptly can cause a rapid rise in heart rate and blood pressure and may increase the risk of serious heart problems. Dose changes should be discussed with a healthcare professional.
If you take metoprolol, it can help to know:
- Your dose (for example, 25 mg, 50 mg, 100 mg)
- Whether it is metoprolol tartrate or metoprolol succinate
- Why it was prescribed
- Any symptoms you’ve noticed
I can help you sort out which effects are common and which deserve medical attention.
