I am nebulizing a 3% mixture and am feeling better. I could only blow 150 in the little plastic tube I got in the hospital a few months ago when I was first hit with this inconvenience called emphysema! I can now blow 200 as of two days ago.l. I have not used the drugs very much. I have been doing some breathing exercises and I plan to repair or "remodel" the bad area of my lungs. So, that's my story and I am sticking to it! OH! one more thing.....Ibuprofen- look it up as in trials for emphysema. I am now taking it! sounds extremely promising and SAFE