I second what Marci said!! Abby has been on it for 19 days now and I am trying to be very skeptical but her PFT's are looking great, and she has not had a cough or sinus drainage which is huge for her!! We go in for sweat test next week. Good luck to you!! And I hope you are able to get on it ASAP!! <img src="i/expressions/face-icon-small-smile.gif" border="0">