What is Breo Ellipta? This medication is used to prevent and decrease symptoms (wheezing and trouble breathing) caused by asthma and ongoing lung disease (chronic obstructive pulmonary disease-COPD, including chronic bronchitis and emphysema). This inhaler contains 2 medications: fluticasone and vilanterol. Fluticasone belongs to a class of drugs known as corticosteroids. It works by reducing the swelling of the airways in the lungs to make breathing easier. Vilanterol belongs to a class of drugs known as long-acting beta-agonists. It works by opening airways in the lungs to make breathing easier.