<p>This preparation contains both futicasone furoate and vilanterol, the mechanisms of action described below for the individual components. These drugs represent 2 diferent classes of medications (a synthetic corticosteroid and a LABA) that have diferent efects on clinical and physiological aspects. The pharmacologic efects of beta 2-adrenoceptor agonist drugs, including vilanterol, are at least in part attributable to stimulation of intracellular adenyl cyclase, the enzyme that catalyzes the conversion of adenosine triphosphate (ATP) to cyclic-3, 5-adenosine monophosphate (cyclic AMP). Increased cyclic AMP levels cause relaxation of bronchial smooth muscle and inhibition of release of mediators of immediate hypersensitivity from cells, especially from mast cells. The precise mechanism through which futicasone furoate afects COPD and asthma symptoms is not known. Infammation is an important component in the pathogenesis of COPD and asthma. Corticosteroids have been shown to have a wide range of actions on multiple cell types (e.g., mast cells, eosinophils, neutrophils, macrophages, lymphocytes) and mediators (e.g., histamine, eicosanoids, leukotrienes, cytokines) involved in infammation.</p>