Background: Combinations of a long-acting muscarinic receptor antagonist (LAMA), long-acting β-agonist (LABA), and inhaled corticosteroid (ICS) are used for patients with persistent chronic obstructive pulmonary disease (COPD) exacerbations on bronchodilator monotherapy. In this prespecified subgroup analysis, we assessed the efficacy and safety of the LAMA revefenacin in patients with COPD taking concomitant LABA, including ICS/LABA (LABA subgroup).
Methods: Efficacy data were obtained from two 12-week, replicate, placebo-controlled trials and safety data were pooled from the 12-week and a 52-week tiotropium-controlled trial. Patients received revefenacin 175 µg or placebo in the 12-week or tiotropium 18 µg in the 52-week studies. The efficacy endpoint was least squares (LS) mean change from baseline in trough forced expiratory volume in 1 second (FEV1). Clinical health outcomes were assessed using the St. George's Respiratory Questionnaire (SGRQ).
Results: Revefenacin produced similar improvements from baseline in trough FEV1 in the non-LABA and LABA subgroups [placebo-adjusted LS mean change (95% confidence interval) in day 85 trough FEV1, 150.9 (110.3-191.6) ml and 139.2 (82.9-195.5) ml; p < 0.0001 versus placebo]. Similar improvements were observed in SGRQ scores in the non-LABA and LABA subgroups [-3.3 (-5.4 to -1.2) and -3.4 (-6.3 to -0.6)]. Improvements in lung function and health outcomes were observed regardless of airflow obstruction severity. Revefenacin was well tolerated with more adverse events reported in the LABA than the non-LABA subgroup.
Conclusions: Once daily revefenacin for nebulization can be an effective and well-tolerated treatment for patients who require concomitant use of LABA with or without ICS.
Clinicaltrials.gov identifiers: NCT02512510, NCT02459080, NCT02518139 The reviews of this paper are available via the supplemental material section.
Keywords: long-acting muscarinic receptor antagonist; nebulization; triple therapy.