I have copd and am curious of how long I will have to use it.
That's a very good question. The medicines in Advair (Sevevent and Flovent) are preventative medicines with the sole intent on preventing asthma and COPD flair ups. If you use it as recommended (1 puff twice a day or as prescribed), it is proven effective and safe. This is the kind of medicine that you have to take EVERY DAY even when you are feeling well. If Advair works for you, then chances are you MAY need to take it rest of your life, unless a better medicine is some day invented.
You will probably have to use it forever if it helps your breathing unless a new medication is found that will work better. I have COPD and asthma and know how well it keep me from flare ups. I am resigned to the fact that I will use medications forever. It sure beats the alternatives; suffering to breathe or flare ups. I also work hard to avoid people with colds because I always get bronchitis or pneumonia not a common cold.