Overview Morphine, Dyspnea, Exercise and COPD Status: Unknown status Trial end date: 2016-08-01 Target enrollment: Participant gender: Summary The investigators are studying the effect of a single dose Opioid drug (Morphine) on dyspnea and exercise tolerance in COPD patients. Phase: Phase 3 Details Lead Sponsor: McGill University Health CenterMcGill University Health Centre/Research Institute of the McGill University Health CentreTreatments: Morphine