The purpose of this study is to investigate the time course of PF-00241939 concentrations in the blood following dosing by oral inhalation using dry powder inhalers.

Inclusion Criteria:

• Healthy male and/or female subjects between the ages of 21 and 55 years.
• Body Mass Index (BMI) of 17.5 to 30.5 kg/m2; and a total body weight >50 kg (110 lbs).

Exclusion Criteria:

• Evidence or history of clinically significant hematological, renal, endocrine, pulmonary, gastrointestinal, cardiovascular, hepatic, psychiatric, neurologic, or allergic disease (including drug allergies, but excluding untreated, asymptomatic, seasonal allergies at time of dosing).
• Pregnant or nursing females.
• A positive urine drug screen.