DISKUS ® inhalers, such as ADVAIR and FLOVENT®, are dry powder steroid medicines that reduce the swelling (also called inflammation) in the lungs. They are used daily to prevent asthma symptoms. Follow the steps below to learn how to use a DISKUS ® inhaler. DISKUS inhalers come in different strengths of medicine. ®ADVAIR : 100/50, 250/50 ...