Assessment of the inhalation profiles of four dry powder inhalers in patients with variable degrees of lung obstruction

Randomized to device sequence

Inclusion Criteria:

• Subjects with a physician documented history or diagnosis of asthma for at least 6 months
• Reversibility, defined as an increase in FEV1 at the Screening visit of greater than or equal to 12% and 200 mL
• Subjects with a physician documented history or diagnosis of mild or severe Chronic Obstructive Pulmonary Disease

Exclusion Criteria:

• Female subjects who are pregnant
• Subjects who have a history of life-threatening asthma/COPD or who have experienced two or more exacerbations requiring hospitalization in the 12 months prior to screening
• Evidence of lower respiratory tract infection
• Subjects diagnosed with pulmonary fibrosis, bronchiectasis, pneumoconiosis, sarcoidosis or tuberculosis

Asthma and COPD patients