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  • Title: Efficacy and safety of combining olodaterol Respimat(®) and tiotropium HandiHaler(®) in patients with COPD: results of two randomized, double-blind, active-controlled studies.
    Author: ZuWallack R, Allen L, Hernandez G, Ting N, Abrahams R.
    Journal: Int J Chron Obstruct Pulmon Dis; 2014; 9():1133-44. PubMed ID: 25342898.
    Abstract:
    BACKGROUND: Combining bronchodilators with different mechanisms of action may improve efficacy and reduce risk of side effects compared to increasing the dose of a single agent in chronic obstructive pulmonary disease (COPD). We investigated this by combining two long-acting bronchodilators: once-daily muscarinic antagonist tiotropium and once-daily β2-agonist olodaterol. METHODS: Two replicate, double-blind, randomized, 12-week studies (ANHELTO 1 [NCT01694771] and ANHELTO 2 [NCT01696058]) evaluated the efficacy and safety of olodaterol 5 μg once daily (via Respimat(®)) combined with tiotropium 18 μg once daily (via HandiHaler(®)) versus tiotropium 18 μg once daily (via HandiHaler(®)) combined with placebo (via Respimat(®)) in patients with moderate to severe COPD. Primary efficacy end points were area under the curve from 0-3 hours of forced expiratory volume in 1 second (FEV1 AUC0-3) and trough FEV1 after 12 weeks (for the individual trials). A key secondary end point was health status by St George's Respiratory Questionnaire (SGRQ) total score (combined data set). RESULTS: Olodaterol + tiotropium resulted in significant improvements over tiotropium + placebo in FEV1 AUC0-3 (treatment differences: 0.117 L [P<0.001], ANHELTO 1; 0.106 L [P<0.001], ANHELTO 2) and trough FEV1 (treatment differences: 0.062 L [P<0.001], ANHELTO 1; 0.040 L [P=0.0029], ANHELTO 2); these were supported by secondary end points. These effects translated to improvements in SGRQ total scores (treatment difference -1.85; P<0.0001). The tolerability profile of olodaterol + tiotropium was similar to tiotropium monotherapy. CONCLUSION: These studies demonstrated that olodaterol (Respimat(®)) and tiotropium (HandiHaler(®)) provided bronchodilatory effects above tiotropium alone in patients with COPD. In general, both treatments were well tolerated.
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