### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi. I had open heart surgery for removal of a left atrial myxoma on 11/25/13. Minimal invasive procedure ( incision under my right breast) discharged on 11/29. 11/30 had palpitations and irregular beats (PAC and some PVC ) - no atrial fib. Was put on Lopressor 25 mg daily (12.5mg in am and 12.5 mg in evening). I still feel SOB ( same as before the surgery). Cardiologist said cardiac wise Im fine - should stop the lopressor  and maybe see a pulmonologist. He said it is such a small dose that I dont have to wean off of it. 30 years ago I was put on Inderal for migraines(dont remember dose) and I had Sob and developed allergic bronchitis from the Inderal. Is it possible my continued sob could be from the low dose Lopressor and can I stop it abruptly since it is a low dose and I have only been on it for 2 months?

### output:

Hello Lopressor and federal are of same group drugs, through Lopressor is more cardiac specific. However, there are fair chances that if you did not tolerate federal you might not tolerate Lopressor too. The dose of federal you are on is very mild, however I would prefer that you take once a day 12.5 mg for a week and then stop to make sure that PAC s don't occur. Yes both federal and Lopressor can cause allergic bronchitis (asthma) like picture, and it should be avoided if that is the case. If at all PAC or any arrhythmia occurs calcium channel blocker like Vera mil / diltiazem would be ideal for you. Let me know if any clarification needed.  Regards Chat Doctor. 