Efficacy of Ciclesonide on Small Airways in Patients With Stable Asthma (18 to 60 y) (BY9010/M1-131)

Main Inclusion Criteria: * Written informed consent * History of bronchial asthma * FEV1 more than or equal to 60% of predicted * Stable asthma * Patients who are in good health with the exception of asthma Main Exclusion Criteria: * Concomitant severe diseases, diseases expected to interfere with the outcome of the study, or diseases which are contraindications for the use of ICS * COPD (i.e. chronic bronchitis or emphysema) and/or other relevant lung diseases causing alternating impairment in lung function * Use of ICS 4 weeks before entry into the baseline period * Pregnancy * Intention to become pregnant during the course of the study * Breast feeding * Lack of safe contraception * Use of other drugs not allowed * Current smokers and ex-smokers with more than or equal to 10 pack-years