This may sound a silly question but here goes. I have parox Af and am on all the usual tablets. I'm just wondering, when my heart isn't beating too fast, so at a normal rate, wont the daily doses of Bisprolol make it too slow? I'm usually on 62/65 (that's when Ive checked) Could this be why I have the odd days when fatigue hits? I have been taking 1 tablet in the morning and half at night. Thankyou.