This is a randomized, six-way crossover study to determine the efficacy and dose-response profile of SUN101. The study population will consist of subjects 40 to 65 years-old (inclusive), with a diagnosis of moderate to severe COPD. Aclidinium bromide 400 mcg bid will be given as an active comparator. The study will be double-blind for SUN-101 and placebo and will be open-label for aclidinium.
Study for subjects 40 to 65 years-old with a diagnosis of moderate to severe COPD. Aclidinium bromide 400 mcg 2x a day will be given as an active comparator.