The combination of fluticasone and salmeterol is used to prevent wheezing, shortness of breath, and breathing difficulties caused by asthma and chronic obstructive pulmonary disease (COPD; a group of lung diseases that includes chronic bronchitis and emphysema). Fluticasone is in a class of medications called steroids. It works by reducing swelling in the airways. Salmeterol is in a class of medications called long-acting beta-agonists (LABAs). It works by relaxing and opening air passages in the lungs, making it easier to breathe.