I have also learned about nebulizing saline on this site and requested the prescription from my Dr. At first he gave me .9% I used that for a while. Then I requested 3%. Which is what I’m still using daily. My next appointment I think i will request 7% just to have it on hand in case I need it. I was Dx with nodules 2013 but my former pulmonologist never requested I be tested for anything else. I was Dx with MAC/MAI in 2016 after a lung surgery. Got a new Dr, got on this site and thankfully still no meds for me. I’m very grateful for all help and the excellent advice I have received here.