Can taking Metoprolol for tachycardia cause any side effects?

Question

Hello doctor,

I went to a cardiologist, and he diagnosed me with tachycardia. However, he did not explain where or how he detected it. The truth is, I experience tachycardia almost every day, especially between 11 AM and 4 PM. He prescribed Metoprolol 25, but I am worried about its side effects, especially since I have asthma. I also have my medical test results if you would like to review them.

Answer 1

Hello,

Welcome to icliniq.com.

Please send me your ECG (electrocardiogram) and other test reports so that I can guide you more effectively. If you have asthma and tachycardia, Nebivolol may be a better option than Metoprolol. However, I need to review your reports to develop an appropriate treatment plan.

Regards.

Answer 2

Hello,

Welcome back to icliniq.com.

I have reviewed all your reports and found them to be completely normal (attachments removed to protect the patient’s identity). Your Holter monitor results showed a normal heart rate, with variations between fast and slow heart rates, which are typical over a 24-hour period. Your TMT (treadmill test) results were also entirely normal, with appropriate chronotropy—meaning your heart rate increased normally with exercise and decreased with rest.

The occasional tachycardia (fast heart rate) you experience may be a side effect of the inhalers or oral medications you take for asthma, as some of these can cause an increased heart rate. However, this is not dangerous.

As for chest pain, it could be related to chest tightness associated with asthma, which is usually relieved by asthma medications. I recommend managing anxiety and stress, as these can also contribute to symptoms. Additionally, engage in regular, moderate-intensity exercise to maintain overall health.

Regards.

Answer 3

Hello,

Welcome back to icliniq.com.

Both Metoprolol and Nebivolol are equally effective in reducing heart rate, but Metoprolol can have more side effects on the lungs and may sometimes worsen asthma. Nebivolol is more selective for the heart and has fewer effects on the lungs. When discontinuing a beta blocker, caution is necessary. It should not be stopped abruptly, as this could worsen heart rate. The dose should be gradually reduced: start by cutting the dose by one-fourth, then after two weeks, reduce it by half, and so on.

Regarding tachycardia, your Holter report shows an average heart rate of 63, and your heart rate even dropped to 40, which is normal for young people like you. Your TMT also showed a resting heart rate of 76, which is completely normal. Therefore, your palpitations are subjective and have no objective evidence.

One suggestion is to monitor your heart rate at random times throughout the day, counting for one minute. For most people, the normal range is 60 to 100 beats per minute. If it exceeds 100, you may consider continuing Metoprolol or switching to Nebivolol if asthma symptoms worsen. If asthma symptoms still worsen, other options are available, but first-line medications should be tried initially. If your heart rate is within the normal range, you can feel reassured, relax, and continue with your current medication if you are already taking one. If you need further guidance, I would be happy to help.

Thank you.