Terri, if you're worried about how long Kaylee's treatments will take, I'd ask the doc to prescribe an albuterol (or xoponex) inhaler and have Kaylee do a couple quick puffs on that prior to the Tobi. What most people have said here is correct, in my opinion: albuterol (or xoponex) helps open the airways so the antibiotic (or whatever else Kaylee's using) can get into the airways better. An inhaler, as opposed to a nebulized treatment, is a quick way to open the airways prior to Tobi inhalation.