Investigational Drugs 4 Weeks Disallowed Light Treatments 4 Weeks Disallowed Systemic corticosteroid used 4 Weeks Disallowed for atopic dermatitis flare Topical tacrolimus or 2 Weeks Disallowed pimecrolimus Topical corticosteroids Must be on stable Allowed at stable doses dose for 2 weeks (Triamcinolone ointment 0.1% only) Any systemic 4 Weeks Disallowed immunosuppressive medication Topical and systemic antibiotics Cannot be on Allowed if infection antibiotics at the develops start of study