10 Metoprolol Side Effects People Commonly Report
- Fatigue or unusual tiredness
- One of the most common side effects.
- Some people describe feeling low-energy or less able to exercise.
- Dizziness or lightheadedness
- Often related to lowered blood pressure or a slower heart rate.
- Slow heart rate (bradycardia)
- Expected to some degree because metoprolol is a beta blocker, but excessive slowing can be a problem.
- Low blood pressure
- May cause weakness, faintness, or feeling unsteady when standing up.
- Shortness of breath
- Less common, but important to report, especially if it worsens or is new.
- Depression or mood changes
- Reported by some patients, though not everyone experiences this.
- Sleep problems and vivid dreams
- Insomnia and nightmares can occur.
- Digestive issues
- Diarrhea, nausea, constipation, or stomach discomfort are reported side effects.
- Cold hands and feet
- Because beta blockers can affect circulation in the extremities.
- Sexual side effects
- Reduced libido or erectile difficulties can occur in some patients.
Serious Side Effects That Need Medical Attention
Seek prompt medical advice if you develop:
- Fainting
- Severe shortness of breath
- Chest pain
- Markedly slow heart rate
- Swelling of the legs or worsening heart failure symptoms
- Wheezing or severe breathing difficulty
- Signs of an allergic reaction
One Important Warning
Do not stop metoprolol suddenly unless your doctor tells you to. Abrupt discontinuation can worsen chest pain, trigger rapid heart rate, raise blood pressure, and in some cases increase the risk of a heart attack.
If you’re taking metoprolol and are concerned about side effects, tell me:
- your dose,
- whether it’s metoprolol tartrate or metoprolol succinate, and
- what symptoms you’re experiencing,
and I can help you understand which effects are commonly associated with the medication.

