A Comparison of the Effects of Tiotropium (18 Mcg) Inhalation Capsule q.d. and Salmeterol (50 Mcg) Inhalation Aerosol b.i.d. on Arterial Blood Gases in a Double-blind, Double-dummy, 4-week Crossover Study in Patients With Chronic Obstructive Pulmonary Disease (COPD).
A Comparison of the Effects of Tiotropium (18 Mcg) Inhalation Capsule q.d. and Salmeterol (50 Mcg) Inhalation Aerosol b.i.d. on Arterial Blood Gases in a Double-blind, Double-dummy, 4-week Crossover Study in Patients With Chronic Obstructive Pulmonary Disease (COPD).
To evaluate changes in PaO2 following inhalation of Tiotropium by HandiHaler compared to Salmeterol MDI in patients with moderate to severe COPD.