This is multicenter, randomized, double-blind, double-dummy, placebo-controlled, three-way cross-over, incomplete block design study to evaluation of 5 doses of GSK573719 administered once-daily and 3 doses of GSK573719 administered twice-daily over 14 days in subjects with COPD and will include tiotropium as an open-label active control. The pharmacokinetic profile of GSK573719 will also be evaluated.
The study will evaluate the dose response, safety, and pharmacokinetics of GSK573719 compared with placebo in subjects with COPD.