Effect of ciclesonide on allergen challenge in subjects with bronchial asthma

The aim of this clinical trial was to investigate whether repeated inhalation of the new inhaled steroid ciclesonide reduces the early-phase (EAR) and late-phase (LAR) reactions after allergen challenge in patients with mild allergic asthma. Also, this study provides further data on safety and tolerance of ciclesonide.

The study was designed as a double-blind placebo-controlled randomized crossover trial. Following a baseline period, patients were randomized to either of two treatment sequences (ciclesonide/placebo, placebo/ciclesonide) each of which lasted for one week and were separated by 3-5 weeks from the alternate treatment sequence. Patients received 800 micro g ciclesonide twice daily by means of a Cyclohaler. At the end of each treatment patients were subjected to an allergen challenge.

Thirteen asthmatic patients (mean FEV1 of 91% predicted) who experienced an EAR and LAR after allergen challenge participated in the study. The time-average FEV1 decreases 0-2 h (2-12 h) after allergen challenge as measure of the EAR (LAR) were significantly reduced (P < 0.05, one-sided) from 0.426 L to 0.233 L (EAR) and from 0.443 L to 0.213 L (LAR), respectively. Thus, the study results suggest that ciclesonide significantly lowered the extent of EAR and LAR compared to placebo. Ciclesonide was well tolerated and no drug-related adverse events were reported. Cortisol excretion in 24-h urine showed no significant difference between ciclesonide and placebo.

The study supports the efficacy and safety of ciclesonide.