Advair Diskus is used for the long-term maintenance treatment of asthma. It is only for people whose ashtma symptoms are not well-controlled on other asthma medications, as one of its active ingredients (salmeterol) may increase the likelihood of asthma-related death.
Full prescribing information is available at:
http://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?id=8679