thanks all, good to know. He did OK for the first 10-12 days and for the last few has been a little raspy but it seems to be improving now. I'm not sure how long they will keep him on tobi. he will finish this 28 day cycle and I guess we will follow up with his pulmonary doc next month. He is also on azithromycin Mon,Wed and Fridays (not sure how long he will do this). The doctors explained that this was more for its anti-inflammatory response in CF patients as opposed to the anti-biotic use. The rasp started around the time he started this, but I think I just blamed the tobi, maybe it was something else...