Hi Ken - if your question refers to me and my comment about Amiodarone being "toxic to my lungs", I will respond. By the way, I, too, am on Xarelto and have been for over 4 years when I first went into AF; Xarelto is not causing me any problems. At the time of my AF, besides Xarelto, I was also put on Amiodarone. I gradually became shorter and shorter of breath. Various doctors said it was due to the AF. When I collapsed one day because my heart rate had dropped into the 30's, I stopped the Amiodarone. However, I was unable to walk across the room because my breathing was so bad. I saw a pulmonologist who said my lungs sounded like tissue paper. A CT scan showed lung toxicity due to drug therapy, and "density of the liver that can be seen with amiodarone treatment". I was on steroids for 4 months and then had another CT which fortunately showed great improvement. I also learned that there was a class action suit against Amiodarone because of lung damage (I was not involved in that). My pulmonologist actually referred to Amiodarone as a "poison pill". Obviously, MANY people take this drug without having any side effects, and cardiologists prescribe it regularly. I was just an unlucky person. Now, Ken, if your question did NOT refer to my statement about Amiodarone - please ignore this response!