<prompt> A 55-year-old male, with uncontrolled diabetes mellitus and hypeension, developed severe air-borne contact dermatitis. The most appropriate drug for his treatment would be:Systemic coicosteroidsThalidomideAzathioprineCyclosporine  <response>: C i.e. Azathioprine In contact dermatitis, the allergic reaction is mediated by delayed hypersensitivity cell mediated immunity. It is treated by: - Antihistamincis - Steroids topicalsystemic - Agents depressing cell mediated immunity as cyclosporine, tacrolimus, azathioprine 