Pharmacodynamic Equivalence of the Test and Reference Metered Dose Inhalers (MDIs) Containing Albuterol Sulfate in Adult Patients With Stable Mild Asthma

This study compares the effectiveness of a generic albuterol inhaler to the brand-name version (Proventil HFA) in adults with mild, stable asthma, using a standardized breathing test to confirm they work equivalently. **You may be eligible if...** - You are between 20 and 65 years old - You have a confirmed diagnosis of mild asthma and have been using a low-dose inhaled corticosteroid with or without a rescue inhaler for at least 1 month - Your lung function (FEV1) is at least 80% of normal after withholding your rescue inhaler for 8 hours - You have not smoked for at least 6 months and have less than 5 pack-years of smoking history - Your BMI is between 17 and 35 **You may NOT be eligible if...** - Your asthma is moderate or severe, or unstable - You are a current smoker or recent heavy smoker - You are pregnant or breastfeeding - You have significant other medical conditions - You are unable to use an MDI inhaler correctly Talk to your doctor to see if this trial is right for you.