I just started taking NAC so can’t say yet how much it helps, but I’m optimistic. Will report back to the group. In my case, where the small airways in the upper right lobe are most affected, I have to absolutely have a lot of warm liquid in my food and warm liquids throughout the day or I can count on an exacerbation—regardless of what else I take. The very warm water is miraculous—so far, as long as I am also very careful to keep my diet liquidy. Last night, for instance, I woke up at 5 am with a mucus plug I could feel in my upper lobe. It’s always scary because it gives me the urge to cough and coughing is dangerous for me. Instead, I sat up and slowly drank ten ounces of very warm water. That dislodged it after a few minutes and I neither had to cough nor clear my throat. I just pray that keeps working.