Study to Evaluate Efficacy and Safety of Bronpass Tab. in Patients With Chronic Obstructive Pulmonary Disease

This study is evaluating the effectiveness and safety of a new tablet medication called Bronpass in people with chronic obstructive pulmonary disease (COPD) — a long-term lung condition that makes it hard to breathe. **You may be eligible if...** - You are 40 years of age or older - You have been diagnosed with COPD according to standard Korean guidelines - Your breathing tests show: FEV1/FVC below 0.70 and FEV1 between 30% and 80% of the predicted value after using a bronchodilator (a breathing medication) - Your cough or phlegm symptoms score at least 3 on the CAT questionnaire - You are a current or former smoker with at least a 10 pack-year history - You understand the trial and have given written consent to participate **You may NOT be eligible if...** - You currently have asthma (though prior asthma diagnosis may be acceptable if assessed by the investigator) - You have had a severe COPD flare-up requiring hospitalization recently - You have significant other lung, heart, or systemic conditions - You are pregnant or breastfeeding Talk to your doctor to see if this trial is right for you.