to take on weekdays, rest on weekends. This is not good, I managed 3 days,then it was so hard to breathe I stopped. Now I try 2 days on, 2 days off, but still my chest aches. I take Symbicort for asma.Would anyone advise Atenolol instead of Cordarone? Or anything you can tell me ? Please help - Thankyou- anna.