Study to Look at and Compare How Inhaled and Intravenous Fluticasone Furoate and GW642444 Are Processed by the Body in Healthy Subjects

Fluticasone furoate (FF), a novel glucocorticoid, and GW642444, a potent, inhaled longacting, beta2-receptor agonist (LABA), are currently under development in combination for use as a once-daily, inhaled treatment for asthma and chronic obstructive pulmonary disease (COPD). FF is also being developed as a stand-alone product for asthma and GW642444 is also being developed as a stand-alone product and in combination with a novel, long-acting muscarinic antagonist for the treatment of COPD. This study is being performed to determine the absolute bioavailability of both FF and GW642444 when delivered in combination from the novel dry powder inhaler.