I have been using Advair on & off for a year. I too suffer from post nasal drip, phlegm, dry mouth & coughing fits.
I heard about the side effects on the Today show this morning and had just taken a dose of Advair. I immediately went to the web to research this drug and after reading dozens of postings detailing the same side effects, I am convinced my lingering cold-like symptoms are a direct result of using Advair. I've taken my last dose and I'm anxious to see if my health improves.