• Colin Reisner, James Pearle, Edward M Kerwin, Rose Earl St ES Pearl - a member of the AstraZeneca Group, Morristown, NJ, USA., and Patrick Darken.
• Pearl - a member of the AstraZeneca Group, Morristown, NJ, USA.
• Int J Chron Obstruct Pulmon Dis. 2018 Jan 1; 13: 1965-1977.

PurposeTo determine the efficacy and safety of glycopyrrolate/formoterol fumarate metered dose inhaler (GFF MDI 36/9.6, 36/7.2, 18/9.6, 9/9.6 µg) using innovative co-suspension delivery technology, compared with glycopyrrolate (GP) MDI 36 µg and formoterol fumarate (FF) MDI 9.6 µg, in patients with moderate-to-severe COPD.MethodsIn this Phase IIb, randomized, double-blind, balanced incomplete-block, two-period, cross-over study (NCT01349816), patients received treatment twice-daily for 7 days. The primary efficacy endpoint was forced expiratory volume in 1 second (FEV1) area under the curve from 0 to 12 hours (AUC0-12) on Day 7. Secondary efficacy endpoints were peak change from baseline in FEV1 through 2 hours; time to onset of action (≥10% improvement in mean FEV1); proportion of patients achieving ≥12% improvement in FEV1 on Day 1; peak change from baseline in inspiratory capacity (IC) on Days 1 and 7; change from baseline in morning pre-dose FEV1; peak change from baseline in FEV1 through 6 hours; and change from baseline in mean evening 12-hour post-dose trough FEV1 on Day 7. Safety was assessed.ResultsAll 185 randomized patients received treatment. All doses of GFF MDI significantly improved the primary endpoint compared with GP MDI 36 µg (all P≤0.0137). For peak change in FEV1 and IC and time to onset of action secondary endpoints, ≥2 doses of GFF MDI demonstrated superiority to GP MDI 36 µg. No significant differences were observed between GFF MDI and FF MDI 9.6 µg for primary and secondary endpoints. The incidence of adverse events was similar between treatments.ConclusionWhile all doses of GFF MDI were superior to GP MDI 36 µg for the primary end-point, in this study neither superiority of GFF MDI to FF MDI 9.6 µg nor a clear dose-response was observed. All treatments were well tolerated with no unexpected safety findings.

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