Effect of Brovana and Tiotropium in Chronic Obstructive Pulmonary Disease (COPD)

This will be a double-blind crossover trial in 20 patient with stable COPD. Data from this study will provide proof-of-concept information on whether the (anticipated) additional bronchodilator effect of Brovana added to tiotropium will lead to a meaningful improvement in the patient-centered outcome, exercise capacity. This study will only evaluate the effects of short-term (1-week) administration of Brovana. If results are positive, it would provide preliminary data for further, multicenter investigations.