A Study To Investigate The Safety, Toleration And Efficacy of PF00610355 In Chronic Obstructive Pulmonary Disease (COPD) Patients.

Inclusion Criteria:

- Post-bronchodilator FEV1/FVC ratio <0.7 and a post-bronchodilator FEV1 of 50-80%.

- Diagnosis of moderate COPD for a minimum of 6 months.

- Stable disease for at least 1 month prior to screening

Exclusion Criteria:

- More than 2 exacerbations of COPD requiring treatment with oral steroids in the
preceding year or hospitalisation for the treatment of COPD within 3 months of
screening or more than twice during the preceding year.

- History of a lower respiratory tract infection or significant disease instability
during the month preceding screening or during the time between screening and
randomisation.