@suenfl.. Hi Sue...Perhaps you need to go for a second opinion? Sounds as though your Doc is not terribly concerned with your thoughts about your body and your treatment. Also sounds as though he may not be up or current on treatment for MAC. Do you live near a Mayo Clinic? My local pulmo said no to saline (no added moisture was his response) yet everything I read about saline made sense so I got my GP to script it..... Then I went to Mayo for a second opinion....The Mayo Dr said yes to nebulizing and gave me so much direction that my local Pulmo never even mentioned. I can't tell you how happy I was that I went for that opinion from someone that I trusted and felt was a specialist to the disease. I hope you get some peace of mind about the direction of your treatment. Good luck. Kate