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  • Title: Effects of arformoterol twice daily, tiotropium once daily, and their combination in patients with COPD.
    Author: Tashkin DP, Donohue JF, Mahler DA, Huang H, Goodwin E, Schaefer K, Hanrahan JP, Andrews WT.
    Journal: Respir Med; 2009 Apr; 103(4):516-24. PubMed ID: 19208459.
    Abstract:
    PURPOSE: Current guidelines support using in combination more than one class of long-acting bronchodilator for COPD patients whose symptoms are not controlled by mono-therapy. This 2-week, multi-center (34 sites), randomized, modified-blind, parallel group study evaluated the efficacy and safety of concomitant treatment with nebulized arformoterol (the formoterol(R,R)-isomer) BID and tiotropium DPI QD. METHODS: COPD patients (mean FEV(1) 1.37L, 45.4% predicted) were randomized to receive mono-therapy (either arformoterol 15microg BID [n=76] or tiotropium 18microg QD [n=80]), or combined therapy (sequential dosing of arformoterol 15microg BID and tiotropium 18microg QD [n=78]). Changes in pulmonary function, dyspnea, and rescue levalbuterol use were evaluated, as were safety outcomes. RESULTS: Mean FEV(1)AUC(0-24) (the primary endpoint) improved similarly from baseline for arformoterol (0.10L) and tiotropium (0.08L) treatment groups and greater for the combined therapy group (0.22L; all p-values <0.005). Peak FEV(1), peak FVC, 24-h trough FEV(1), and inspiratory capacity also improved similarly for the mono-therapies and greatest for the combined therapy. Dyspnea (mean transition dyspnea index) improved similarly for arformoterol (+2.3) and tiotropium (+1.8) and greatest with combined therapy (+3.1; p-values <0.05). Levalbuterol use decreased for all treatment groups (range -1.8 to -2.5 actuations/day). All treatments had similar frequency of adverse events. CONCLUSION: In this study, the combination of nebulized arformoterol 15microg BID plus tiotropium 18microg DPI QD was the most effective in improving pulmonary function and disease symptoms. Mono-therapy improvement with arformoterol or tiotropium was similar. All three treatments were well tolerated.
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