Dataset from Randomised, Double-Blind, Placebo-Controlled, Parallel Group Study to Assess the Efficacy (Bronchodilation) and Safety of 4 Weeks of Treatment of Orally Inhaled BI 1744 CL (4 Doses) Delivered by the Respimat® Inhaler in Patients With Asthma

The primary objective of this study is to determine the optimum dose(s) of BI 1744 CL inhalation solution delivered by the Respimat® inhaler for four weeks in patients with asthma. The selection of the optimum dose(s) will be based on bronchodilator efficacy (how well it helps your breathing), safety evaluations and pharmacokinetic evaluations (the amount of the medication found in your blood).