Comparing the efficacy of Bricanyl M2 and Bricanyl M3 at 0.5 and 1.5 mg dose levels, to allow for a switch from Bricanyl Turbuhaler M2 to Bricanyl Turbuhaler M3

A randomised, double-blind, double-dummy, multi-site, phase III, single dose, 4-way cross-over pharmacodynamic study evaluating the efficacy of Bricanyl Turbuhaler M3 compared to Bricanyl Turbuhaler M2 by studying the protective effect on methacholine induced bronchoconstriction in patients with stable, mild to moderate asthma

The study will include female and male patients, between 18 and 65 years old, with stable, mild to moderate asthma who are on short acting β2-agonist (SABA) alone, on low dose inhaled corticosteroid (ICS) (200-400 µg budesonide or corresponding) or on a combination of low dose ICS and long acting β2-agonists (LABA). Approximately 60 patients will be randomised in order to have 49 completed. The primary objective is to demonstrate therapeutic equivalence between Bricanyl Turbuhaler M3 and Bricanyl Turbuhaler M2 using bronchoprotective effect. Outcome measure: PC20 (Methacholine provocative concentration causing a 20% drop in FEV1). The safety objective is to compare safety of Bricanyl Turbuhaler M2 and Bricanyl Turbuhaler M3. Outcome measure Adverse Events/Serious. Study period Q1 2015 – Q1 2016.