<prompt> The most effective drug in the treatment of sub-corneal pustular dermatosis?AzithromycinDapsoneChloroquineCyclosporine  <response>: Subcorneal Pustular Dermatosis Sneddon-Wilkinson disease It is a rare, benign, chronic relapsing sterile pustular eruption typically involving the flexural sites of the trunk and proximal extremities Rx: Dapsone is the treatment of choice. Response is slow, with resolution usually occurring in about 4 weeks. Acitretin is also used and is an alternative for patients unresponsive to Dapsone. Phototherapy with psoralen with UVA, broadband UVB, and narrowband UVB alone or in combination with dapsone andor retinoids 