I was put on flecainide and metoprolol but the flecainide caused me to develop atrial flutter - more specifically, SVT, and several scary trips to the ER and
cardioversion). I'm now off the flecainide, and
was increased to 100 mg/day. I'm already having some unpleasant side effects (very tired, aching sore legs at night, and yes, flatulence - which is just wonderful).