Just a thought, if you do want to try the Tobi again- Starting the GSH, adding Magnesium, and, most importantly, doing my Advair 250 <i>before </i>my Tobi has let me use it again. About 6 years ago, Tobi made me so SOB that I had to go in the hospital for IVs, to get it back under control. Now, if I do my Advair before (immediately before) my Tobi, I can tolerate it for at least 21 days. If I miss one time with the Advair though, that round of Tobi is over. Something to ask your dr. about, if you want <img src="i/expressions/face-icon-small-wink.gif" border="0"> .