I've been on 100mg of flecainide, twice a day since October. I've had one AFIB episode, but several times I thought I would pass out, but didn't feel like my AFIB episodes. I was taking Omeprezole for acid reflux and I take a benedryl at night to help me sleep. After several of the above episodes, I stopped the Omeprezole and cut the benedryl to half a pill. I still frequently feel like I'm weak and "woozy", but haven't had any of the bad episodes. I wore a monitor for a month with no results and I check for AFIB frequently with my Kardia device. I plan to have an ablation this summer, but am discouraged by how bad I feel on the Flecainide. Anyone out there know of a way to combat this feeling?