 - Use of any systemic treatment including phototherapy known or suspected to have an effect on AD within four weeks prior to the screen visit patients on a stable and low dose of inhaled steroids, on a stable dose of anti histamines, on stable dose of leukotriene antagonists, or receiving occasional short-acting b2-agonists for the treatment of asthma and topical corticosteroids nasal spray for the treatment of allergic rhinitis may participate. High-dose inhaled corticosteroids 440 mcg of fluticasone a day and anti-IgE products are not permitted. 