Response to bronchodilator and clinical, pathophysiological features in patients with nonasthmatic eosinophilic bronchitis

Introduction Whether nonasthmatic eosinophilic bronchitis (NAEB) shows response to bronchodilator (RB) remains unclear. Objectives To investigate the RB and its relationship with clinical and pathophysiological features in NAEB. Methods Fifty‐one patients with NAEB were assigned in a 2:1 ratio to receive oral bambuterol hydrochloride (n = 34, 10 mg, once daily, for 3 days) or matched placebo (n = 17) randomly, of whom 48 patients (32 with...