I have about a month left, and it hasn't cured my CF (I wish!) but it has increased my lung function and (maybe?) kept me from illness. It really is a nice drug. I hope it's approved and sold on the market soon. The main problem with it, as has been said, is that it's a three times a day treatment. Very irritating. But it works!
Denufosol works on the chloride channel, right? I safety tested a drug on the sodium channel last year... I wonder how progress on that drug's going.