atrial fibrillation
"No room to here get into my history of AF and flutter, so will make it short. Because of serious AF episode resulting in hospitalization, my cardiologist increased the Tambocor to 100 mg twice a day (had been on 50 twice a day for 3 or so years). Always had dizziness, shortness of breath and feeling unstable since taking this medication. However since increasing to the 200 mg a day, side effects increased and are getting worse. Just experienced the flashing lights today for first time. My search of flecainide and flashing lights brought me to this site. Thank you!  Will reduce dose again to 100mg a day until I can see cardiologist next Wednesday."