- Medications Prior to Screening: Use of the following medications according to the following defined time intervals prior to Visit 1: Depot corticosteroids (12 weeks), oral or parenteral corticosteroids (6 weeks), antibiotics (for lower respiratory tract infection) (6 weeks), cytochrome P450 3A4 strong inhibitors2 (6 weeks), long-acting beta agonist (LABA)/ inhaled corticosteroid (ICS) combination products if LABA/ICS therapy is discontinued completely (30 days), use of ICS at a dose >1000 mcg/day of fluticasone propionate or equivalent (30 days), initiation or discontinuation of ICS use (30 days), tiotropium (7 days), roflumilast (14 days), theophyllines (48 hours), oral leukotriene inhibitors (zafirlukast, montelukast, zileuton) (48 hours), oral beta-agonists long-acting (48 hours), short-acting (12 hours), inhaled long acting beta2-agonists (LABA, e.g., salmeterol, formoterol, indacaterol) (48 hours), LABA/ICS combination products only if discontinuing LABA therapy and switching to ICS monotherapy (48 hours for the LABA component), inhaled sodium cromoglycate or nedocromil sodium (24 hours), inhaled short acting beta2-agonists (4 hours), inhaled short-acting anticholinergic/short-acting beta2-agonist combination products (4 hours) and any other investigational medication 30 days or within 5 drug half-lives (whichever is longer).