10 Often Overlooked Metoprolol Side Effects That Deserve More Attention
Metoprolol is a beta-blocker commonly prescribed for conditions such as high blood pressure, angina, certain heart-rhythm problems, heart failure, and after a heart attack. It works mainly by slowing the heart rate and reducing the effects of adrenaline, which lowers the heart’s workload and blood pressure.
Like every medication, metoprolol can cause unwanted effects. Some are familiar, while others may be subtle enough that people don’t immediately connect them with their medication.
Here are 10 effects worth knowing about.
1. Unusual tiredness or lack of energy
Fatigue is one of the more easily overlooked effects of metoprolol. Because the medicine slows the heart rate and reduces the body’s response to adrenaline, some people may notice that they have less energy than before.
You might feel unusually tired during routine activities or find that exercise takes more effort. Mild tiredness can occur, particularly when treatment is started or the dose is changed.
If fatigue is severe, persistent, or accompanied by dizziness, fainting, shortness of breath, or swelling, contact your healthcare professional.
2. Dizziness and lightheadedness
Metoprolol can lower blood pressure and slow the heart rate. As a result, some people experience dizziness or lightheadedness, particularly when standing up quickly.
Occasional mild dizziness may improve as your body adjusts to the medication. However, repeated episodes or feeling as though you might faint deserve attention.
If you actually faint, seek prompt medical advice because fainting can indicate excessively low blood pressure, a very slow heart rate, or another cardiovascular problem.
3. Exercise intolerance
Some people taking metoprolol notice that they cannot exercise at the same intensity they previously could.
This happens partly because beta-blockers prevent the heart rate from rising as much during physical activity. Consequently, your usual target heart-rate numbers may no longer apply in the same way.
This doesn’t necessarily mean the medication is harming your heart. In many people, the effect is an expected consequence of how beta-blockers work. Nevertheless, tell your clinician if your ability to perform normal activities changes significantly.
4. Sleep disturbances or unusual dreams
Changes in sleep can occur with beta-blockers in some individuals. A person may notice difficulty sleeping, unusually vivid dreams, or changes in normal sleep patterns.
These symptoms aren’t necessarily dangerous, but they can substantially affect quality of life if they persist.
Don’t stop metoprolol suddenly in an attempt to improve sleep. Abrupt discontinuation can cause serious heart problems, particularly in people with coronary artery disease.
Discuss persistent sleep problems with your prescriber, who can determine whether metoprolol is contributing and whether the timing or treatment needs adjustment.
