atrial fibrillation
"I was given this drug in 2009 in a effort to control AFib.  I was on it one month and it did nothing to help the AFib.  Following a cardiac ablation in 2015, I developed random, but frequent PAC (premature atrial contraction)/PVC (Premature ventricular complex)  activity.  My EP suggested the use of this drug to eliminate these events.  I have been on the drug for approximately 3 weeks, initially on 200MG 2 times per day.  Following about 10 days, and no improvement the dosage was increased to 400MG 2 times per day.  The events continue at about the same frequency and still random, however the intensity of the events seems to be lessened."