From everything I've read, Jenny is truly lucky and blessed with how smoothly it has worked. Some insurance companies have a much more difficult process for approval. If you get to the point of them rejecting it, post again, but for now, i'd suggest just calling your CF doctor and ask them to write a script and the pharamacy will let them know if they need to do pre-approval and they usually just do that as a matter of course for off-label things. If it gets sticker, you'll have scientific literature supporting it--which is what most insurance policies require, so that's great. Good luck.