i would like to know if anyone that has been abrubtly stopped in taking sotalol had any side effects. i have been put onto flecainide and i have never felt so ill. shaking, panic attacks, nervous system feels shot. unsteady on my feet. doctor took me off flecainide two days ago saying he thought i was having a bad reaction to it but i still feel very ill. it has spoiled my life completely, ive cancelled christmas so i can concentrate on getting better. just hope these symptoms will clear.