Revefenacin Peak Inspiratory Flow Rate (PIFR) Study in COPD

Inclusion Criteria: * Subject is a male or female subject 40 years of age or older with a diagnosis of COPD. * Subject has a current or past cigarette smoking history (or equivalent for cigar or pipe smoking history) of at least 10 pack-years. * Subject is willing and able to provide signed and dated written informed consent to participate prior to initiation of any study related procedures. Exclusion Criteria: * Subject has a concurrent disease or condition that, in the opinion of the investigator, would interfere with continued study participation or confound the evaluation of safety and tolerability of the study drug. * Subject has a history of reactions or hypersensitivity to inhaled or nebulized anticholinergics. * Subject suffers from any medical condition that would preclude the use of inhaled anticholinergics, including narrow-angle glaucoma, symptomatic benign prostatic hyperplasia, bladder neck obstruction, or urinary retention.