I love the stuff, I get it through my cf pharmacy as well, and I use the 7% stuff, this stuff has raised my pfts up from a 65 to an 89, and hoping they go higher. It use to make me cough all the time but now its every once in awhile it never made me cough "junk" up but I diffanatley felt the junk moving around. Good luck, Im sure youll like it as well.