- Current clinically prescribed medication: The subject must be on the dose and frequency of one of the following ICS/LABA combinations approved for COPD at least 30 days prior screening : FSC at a dose of 500/50 mcg twice-daily (i.e. SERETIDE DISKUS™ inhaler or approved generic product such as AIRFLUSAL FORSPIRO inhaler 500/50 mcg twice daily or ROLENIUM ELPENHALER inhaler 500/50 mcg twice daily) ; The combination of budesonide/formoterol (i.e., SYMBICORT TURBUHALER inhaler) at doses of 200/6 mcg twice-daily or 400/12 mcg twice-daily .