Seretide Accuhaler 50/250 is a long-acting corticosteroid (Fluticasonpropionate) and beta 2 adrenergic (Salmeterol) corticosteroid combination, used for maintenance and symptom relief in patients with bronchial asthma and COPD. Learn about using seretide 50/250, and seretide 50/2 spray, in the article below.