Vilanterol (INN, USAN) is an ultra-long-acting β2 adrenoreceptor agonist (ultra-LABA), which was approved in May 2013 in combination with fluticasone furoate for sale as Breo Ellipta by GlaxoSmithKline for the treatment of chronic obstructive pulmonary disease (COPD). Its pharmacological effect is attributable to stimulation of intracellular adenylyl cyclase which catalyzes the conversion of adenosine triphosphate (ATP) to cyclic-3’,5’-adenosine monophosphate (cAMP). Increases in cyclic AMP are associated with relaxation of bronchial smooth muscle and inhibition of release of hypersensitivity mediators from mast cells in the lungs. Vilanterol is available in following combinations: a) with inhaled corticosteroid fluticasone furoate — fluticasone furoate/vilanterol (trade names Breo Ellipta , Relvar Ellipta; b) with muscarinic antagonist umeclidinium bromide — umeclidinium bromide/vilanterol (trade name Anoro Ellipta).

VILANTEROL α-PHENYL CINNAMATE (GW642444H), originally developed by GlaxoSmithKline, is a long-acting β2 adrenoceptor agonist for once daily treatment of COPD and asthma. Phase III clinical trials are ongoing. GW642444H is Vilanterol a-phenylcinnimate salt. In clinical studies the study drug may been given as a dry powder in the form of either the ‘H’ salt (with the excipient lactose), or in the form of the ‘M’ salt (with the excipients lactose and cellobiose octaacetate). Its pharmacological effect is attributable to stimulation of intracellular adenylyl cyclase which catalyzes the conversion of adenosine triphosphate (ATP) to cyclic-3',5'-adenosine monophosphate (cAMP). Increases in cyclic AMP are associated with relaxation of bronchial smooth muscle and inhibition of release of hypersensitivity mediators from mast cells in the lungs.