- Medication prior to screening: No use of the following medications within the following time intervals prior to Screening or during the study. Long term antibiotic therapy: Subjects receiving antibiotics for long term therapy are not eligible for the study (Antibiotics are allowed for the short term treatment of an exacerbation or for short term treatment of other acute infections); Systemic, Oral, parenteral corticosteroids: 30 days (Except during the study oral/systemic corticosteroids may be used to treat COPD exacerbations/pneumonia). Intra-articular injections are allowed. Any other investigational drug: 30 days or 5 half lives whichever is longer.