A Study in Patients With Moderate Asthma to Compare Pharmacokinetics and Pharmacodynamic Effects of Fluticasone Propionate and Salmeterol Delivered Via the ROTAHALER® Inhaler Relative to the DISKUS® Inhaler

The Fluticasone Propionate/Salmeterol combination (FSC) at a dose of 100/50 micrograms (mcg) twice daily in DISKUS inhaler (also known as ACCUHALER®, Ddpi) inhaler is a recognised and licensed therapy for the treatment of asthma. GlaxoSmithKline (GSK) is developing the ROTAHALER/ ROTACAPS® (Rdpi) inhaler as an alternative treatment option for asthmatic patients. This study is a Phase I, randomised, double-blind, double-dummy, two- treatment, four-way cross-over (replicate design), two sequence, repeat dose, two centre study in mild to moderate asthmatics to compare the pharmacokinetics and pharmacodynamics of fluticasone proprionate/salmeterol (100/50 mcg) delivered via the Rdpi versus the Ddpi. A total of 58 subjects will be enrolled to ensure 52 subjects complete all dosing occasions. Each subject will be allocated to one of two treatment sequences and will participate in four treatment periods, receiving each of the treatments twice. DISKUS, ACCUHALER, ROTAHALER and ROTACAPS are registered trademarks of GSK groups of companies.