atrial fibrillation
"I have been on this for almost 6 years due to atrial fibrillation and am a 49 year old male.  I honestly can't tell if I have had any episodes of atrial fibrillation since being placed on this medicine but do remember feelings of anxiety in bed a handful of times.  I take two doses per day and am also on Metoprolol that I take in the morning.  One thing that struck me when I was first placed on this med back then was the doctor saying that one day it won't work anymore.  So far to good but I am also concerned about the long term use but I guess it's the best option right now."