This study is testing a new medicine called **CHF6001 (Tanimilast)** for people with **COPD** (Chronic Obstructive Pulmonary Disease) and **chronic bronchitis**. COPD is a lung disease that makes it hard to breathe, and chronic bronchitis is a long-term swelling of the airways. The study will last for **52 weeks** (about 1 year) and will compare the new medicine to a placebo, which looks like the medicine but has no active ingredients. The study will see if the new medicine helps when added to the usual treatment people are already taking.

To join, you must be at least **40 years old**, have been a smoker or are currently smoking, and have a history of COPD with some specific breathing test results. You cannot join if you have asthma, certain lung diseases, or other serious health issues.

• **Length:** 52 weeks total
• **Eligibility:** Must have COPD and chronic bronchitis
• **Exclusions:** No asthma or other major health issues