http://www.medications.com/effect/view/41735 diagnosed w atrial fibrillation last jan 2009, prescribed coumadin,2.5 to start per day, now may 2009,leveled off to 10 mg 5days per wk,adn5mg 2days. also since feb prescribed rythmol, coreg & crestor. **but since late March have experienced weigh gain, mos