Harry- I also have to stop during nebulizing the saline....every couple of seconds....to clear out what builds up in my throat/mouth. So yes it is a long nebulizing session for us both...two times a day. I think what is coming up is a combination of fluids, but mostly white, foamy, bubbly substance. From what I have read it is probably related to my Hiatal Hernia and possible GERD. I am worried there will come a day when I can't hardly nebulize due to this fluid that builds up and I have to release it. Crazy! Thank goodness for all the good years I had before this health problem. AND YES....all in between those many types of doctor visits so many of us have to have. Thanks for reading and responding....This Mayo Clinic Connect site is so important for many reasons. Hope you have good results with having to take the anti-biotics.