Therapeutic Equivalence of CHF5993 pMDI 100/6/12.5 µg HFA-152a in Subjects With Mild to Moderate Asthma

This study is comparing two versions of the same triple-combination inhaler (called CHF5993) for people with mild to moderate asthma — one uses a newer, more environmentally friendly propellant (HFA-152a) and the other uses the standard propellant. Researchers want to confirm that the two versions work equally well. **You may be eligible if...** - You are between 18 and 75 years old - You have had an asthma diagnosis for at least 6 months, diagnosed before age 50 - You are a non-smoker or ex-smoker - You have a BMI between 18 and 35 - You are already on a stable asthma treatment with an inhaled steroid (with or without a long-acting bronchodilator) **You may NOT be eligible if...** - You are a current smoker or have smoked heavily in the past - Your asthma is severe or poorly controlled - You have other significant lung conditions - You have recently had a respiratory infection or asthma attack - You are pregnant or breastfeeding Talk to your doctor to see if this trial is right for you.