Overview Efficacy and Tolerability Study in Severe Chronic Obstructive Pulmonary Disease (COPD) Patients Status: Completed Trial end date: 2012-12-01 Target enrollment: Participant gender: Summary Efficacy and tolerability study in severe chronic obstructive pulmonary disease (COPD) patients. Phase: Phase 4 Details Lead Sponsor: AstraZenecaTreatments: BudesonideBudesonide, Formoterol Fumarate Drug CombinationFormoterol FumarateIpratropiumTheophylline