A 6-week Dose Ranging Study of CHF 5259 pMDI in Subjects With Chronic Obstructive Pulmonary Disease

The purpose of this study is to evaluate the dose-response of different doses of CHF 5259 pMDI on lung function and other clinical outcomes, to identify the optimal dose(s) in terms of benefit/ risk ratio for further development in the target subject population.

This is a phase II, multicenter, randomized, double-blind, placebo and active controlled dose-ranging 6-arm parallel group study to identify the optimal dose of CHF 5259 pMDI (pressurized metered dose inhaler) with respect to lung function as well as other clinical efficacy and safety outcomes. After a 2 week run-in period under rescue albuterol and background inhaled corticosteroid (ICS) as needed, patients were randomized to one of the 6 study treatment groups. Following randomization, subjects were assessed after 3 weeks and 6 weeks of study treatment at the study center. A follow-up phone was performed a week after the last visit. During the study, daily symptoms, rescue and background medication use and compliance with the study drug were recorded in a subject diary. Treatment-Emergent Adverse Events (TEAEs) were assessed and recorded throughout the study. At screening and subsequent visits, subjects underwent physical and vital signs examinations, spirometry measurements, and 12-lead electrocardiogram (ECG). Symptoms and chronic obstructive pulmonary disease (COPD) health status were assessed through validated questionnaires. Routine hematology, blood chemistry, and pregnancy testing were performed before enrollment and at end of study. 24-hour (24-H) digital recording of ECGs (Holter) was performed before and after the first dose and just before the last dose of study treatment.