Comparing the Efficacy of Tiotropium + Olodaterol (5/5 µg) Fixed Dose Combination (FDC) Over Tiotropium 5µg in Reducing Moderate to Severe Exacerbations in Patients With Severe to Very Severe Chronic Obstructive Pulmonary Disease
The overall objective is to assess the effect of once daily tiotropium + olodaterol fixed dose combination compared to 5 µg tiotropium (both delivered with the Respimat® inhaler) on moderate to severe COPD exacerbation in patients with severe to very severe COPD