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Edward M Kerwin,1 Thomas M Siler,2 Samir Arora,3 Patrick Darken,4 Earl St Rose,4 Colin Reisner4,5 1Clinical Research Institute of Southern Oregon, Medford, OR, USA; 2Midwest Chest Consultants, St Charles, MO, USA; 3Aventiv Research, Columbus, OH, USA; 4Pearl – a member of the AstraZeneca Group, Morristown, NJ, USA; 5AstraZeneca, Gaithersburg, MD, USA Purpose: This study investigated the efficacy, safety, and pharmacokinetics of the inhaled corticosteroid/long-acting β2-agonist fixed-dose combination budesonide/formoterol fumarate (BFF) metered dose inhaler (MDI), compared with the monocomponents budesonide (BD) MDI and formoterol fumarate (FF) MDI, in patients with moderate-to-severe COPD. Materials and methods: In this Phase IIb, randomized, double-blind, four-period, five-treatment, incomplete-block, crossover study (NCT02196077), all patients received BFF MDI 320/9.6 μg and FF MDI 9.6 μg, and two of either BFF MDI 160/9.6 μg, BFF MDI 80/9.6 μg, or BD MDI 320 μg twice daily for 28 days. The primary efficacy endpoint was forced expiratory volume in 1 second area under the curve from 0 to 12 hours on Day 29. Secondary efficacy endpoints included additional lung function assessments, and evaluation of dyspnea and rescue medication use. Safety was monitored throughout. The systemic exposure to budesonide and formoterol was assessed on Day 29. Results: Overall, 180 patients were randomized. For forced expiratory volume in 1 second area under the curve from 0 to 12 hours on Day 29, all BFF MDI doses showed significant improvements versus BD MDI 320 μg (least squares mean differences 186–221 mL; all p |
