Besvil 100 Octacaps Capsule is used to treat asthma and chronic obstructive pulmonary diseases (COPD). It contains Fluticasone Furoate and Vilanterol. Vilanterol belongs to the class of bronchodilators that works by relaxing muscles and opening the airways of the lungs. Fluticasone Furoate works by inhibiting the release of certain chemicals in the body that cause inflammatory reactions. Thereby providing relief from sneezing, shortness of breath, or wheezing.