Originally Posted by Artmo

Flecainaide is an anti-arrhythmic, not an anti-coagulant like Warfarin or Eliquis.
If you feel OK with afib, keep riding, but watch your HR and ease off your effort as needed.
I am in afib right now, with a resting HR of 80, whereas it should be 60 as controlled by my pacemaker as a minimum. I biked 25 miles yesterday and my HR fluctuated between 119 and 158, so I adjusted my effort to keep it below 130. I am 84 and take Eliquis, but no rate control meds.
Going to see my cardiologist in an hour and will probably be prescribed my 8th cardioversion. I've had two ablations, but the effects lasted only a couple of years each time.