Efficacy and Safety of Aclidinium Bromide 400 µg BID (Twice a Day)Compared to Placebo in Patients With Stable Moderate to Severe Chronic Obstructive Pulmonary Disease (COPD)

Inclusion criteria

• Adult male and female patients aged ≥ 40 with stable moderate to severe COPD (Global Initiative for Chronic Obstructive Lung Disease (GOLD) guidelines).
• Post-salbutamol Forced Expiratory Volume in one second(FEV1) < 80% and ≥ 30% of predicted normal value and Post-salbutamol FEV1/Forced Vital Capacity (FVC) < 70%.
• Current or ex-smokers of ≥ 10 pack-years
• Functional residual capacity (FRC) measured by body plethysmography at Screening Visit ≥ 120% of predicted value

Exclusion criteria

• History or current diagnosis of asthma
• Signs of an exacerbation within 6 weeks ( or 3 months if results in hospitalisation) prior to the screening visit or during the run-in period.
• Clinically significant respiratory and/or cardiovascular conditions or laboratory abnormalities.
• Conditions where the use of anticholinergic drugs is contraindicated, such as known symptomatic prostatic hypertrophy, bladder neck obstruction or narrow-angle glaucoma.
• Patients with an oxygen saturation < 85% during cycle exercise on room air at Screening Visit, Run- in Visit and Visit 1.
• Contra-indications of cardiopulmonary exercise testing.
• Patient who in the investigator's opinion will need to start a pulmonary rehabilitation program during the study and/or patients who have just started/finished pulmonary rehabilitation at least 3 months prior to the Screening Visit.