Hi, @med08 ~
I have been diagnosed with bronchiectasis but have not tested positive for anything but pseudomonas which I took two rounds of Cipro and a short round of prednisone and faithful nebulizing twice and sometimes three times per day was able to eradicate. I do not have asthma but found that nebulizing .63 mg levalbuterol before I nebulize my 7% helps with irritation. You can also get a child's dose of .31 mg that I might talk to my pulmonologist about trying the next time I have an appointment. I think even though I don't have asthma those lower doses open up my airways enough to make the saline more effective and less irritating.
Best of luck to you on finding a treatment plan and routine that works for you. Do you have an appointment with and infectious disease doctor? I know many others on this site have multiple doctors to manage their various NTM bacteria.
Sending hugs and well wishes your way.
~Echo