Formoterol Certihaler, Tiotropium HandiHaler and Tiotropium HandiHaler in Combination With Formoterol Certihaler in Patients With Stable Chronic Obstructive Pulmonary Disease

Exclusion Criteria

• •Pregnant women, nursing mothers, and females of childbearing potential, regardless of whether or not sexually active, who do not use a reliable contraceptive method (oral, mechanical, subcutaneous or surgical contraception).
• •Patients who have been hospitalized for an acute exacerbation of their airway diseases in the month prior to Visit 1 or during screening.
• •Patients who have had a respiratory tract infection within 1 month prior to Visit 1. Patients who develop a respiratory tract infection during the screening period must discontinue from the trial, but will be permitted to re-enroll at a later date (at least 1 month after the resolution of the respiratory tract infection).
• •Patients with concomitant pulmonary disease including a history of cancer (all), pulmonary tuberculosis or congenital bronchiectasis.
• •History of asthma