HPA Axis Study in Japanese Adults

Inclusion Criteria: * Signed written informed consent * Male or female subject aged \>= 20 years * Diagnosis of atopic dermatitis according to the Hanifin and Rajka criteria * Investigator's Global Assessment (IGA) score of 3 (moderate) to 4 (severe) at baseline * Normal ACTH response before start of treatment Exclusion Criteria: * Pregnancy or lactation * Clinically relevant disease, which could interfere with the study conduct or the evaluation and interpretation of the study results * Concomitant medical or dermatological disorder(s), which could interfere with the investigator's ability to evaluate the subject's response to the investigational product * Clinically manifest immunosuppressive disorder or known history of malignant disease