California Allergy & Asthma Medical Group is enrolling COPD patients with chronic bronchitis and a history of exacerbations for this research study.
· Male/Female over 40 years old
· Showing symptoms of chronic bronchitis
· Smokers or former smokers
· Treated with triple combination therapy for last 3 months
· History of exacerbations/worsening within the past 12 months, but none within the past month.