A Study of Azelaic Acid (AzA) 15% Gel in the Treatment of Seborrheic Dermatitis of the Face

Inclusion Criteria: \- Stable or exacerbating seborrheic dermatitis in the facial area Exclusion Criteria: * Psoriasis * Atopic dermatitis * Facial acne and rosacea * Dermatophytic skin infections * Parkinson's disease * Known immunosuppression; HIV infection * Any condition requiring continuous systemic or topical corticosteroid or antimycotic therapy * Continuous asthma inhalation treatment requiring \> 800 mg corticosteroids * Any severe disease likely to interfere with the conduct or the planned termination of the study