I forgot to ask this in an earlier post, so I'll ask it real quick right now: How often is "normal" to use a nebulizer? I use mine, with Duoneb, twice a day, for what my doctor terms "moderate to severe" asthma, along with Advair 500, Singulair, and Combivent (which I use when I'm away from my nebulizer). I also carry a rescue albuterol inhaler which I have not had to use since I started on the Duoneb. My peak flows, after treatments, are in the 440 range. I still have chest tightness on most days, but no other asthma symptoms. Am I "normal" in my use of the neb?