Overview Effect of QVA149 Versus NVA237 and Tiotropium on Chronic Obstructive Pulmonary Disorder (COPD) Exacerbations Status: Completed Trial end date: 2012-07-01 Target enrollment: Participant gender: Summary This study is designed to assess the effect of once-daily QVA149 on COPD exacerbations in patients with severe to very severe COPD. Phase: Phase 3 Details Lead Sponsor: Novartis PharmaceuticalsTreatments: AlbuterolGlycopyrrolateLactitolTiotropium Bromide