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Background: Co-Suspension™ Delivery Technology offers a novel pharmaceutical platform for inhaled drug therapy. This randomized, double-blind, placebo-controlled, single-dose study (NCT01349868) evaluated the efficacy of a range of doses for formoterol fumarate (FF) delivered using Co-Suspension delivery technology via a pressurized metered dose inhaler (MDI) versus placebo in patients with moderate-to-severe chronic obstructive pulmonary disease (COPD). Secondary objectives included determination of non-inferior efficacy and systemic exposure compared with open-label Foradil ® 12 μg (Foradil ® Aerolizer ® ; formoterol fumarate dry powder inhaler). Methods: Patients received each of the 6 study treatments (FF MDI [7.2, 9.6 and 19.2μg], placebo MDI and open-label Foradil ® [12 and 24µg]), separated by 3-10 days. Spirometry was performed 60 and 30 minutes prior to and at regular intervals up to 12 hours post-administration of study drug. The primary outcome measure was the change in forced expiratory volume in 1 second (FEV 1 ) area under the curve between 0 and 12 hours (AUC 0-12 ) relative to test day baseline. Results: A total of 50 patients were randomized to study treatment sequences. All doses of FF MDI demonstrated superiority to placebo ( p &lt;0.0001) and non-inferiority to Foradil ® 12μg, on bronchodilator outcome measures. No serious adverse events were reported during the study. Conclusions: This study demonstrates non-inferiority of bronchodilator response and bioequivalent exposure of FF MDI 9.6μg to Foradil ® 12μg, with both agents exhibiting a similar safety profile in patients with moderate-to-severe COPD. This study supports the selection of FF MDI 9.6µg for further evaluation in Phase III trials.

chronic obstructive pulmonary diseases

Efficacy of Formoterol Fumarate Delivered by Metered Dose Inhaler Using Co-Suspension™ Delivery Technology Versus Foradil® Aerolizer® in Moderate-To-Severe COPD: A Randomized, Dose-Ranging Study