A couple years ago I came down with a cough that would not go away. I was on vacation in the fall in Yellowstone. When I got home, went to the Dr. and he diagnosed me with bronchitis and COPD. Put me on Advair and have not had the problem since. Although I ran out of med. a couple weeks ago and before I could get it refilled, that nasty cough returned. After starting up the med. again, it went away. It is an expensive med. ($253.00 last time for 1 month inhaler)and my ins. won't pay for it. I can get it in Mexico for $55.00 so I stock up when I go there in the winter. Have your Dr. check you out, it may not be just a cold.