Iontophoresis in Psoriasis

Iontophoresis potentially may be a good alternative to improved delivery of corticosteroids. Study Investigators propose to use iontophoresis to increase dexamethasone delivery into thick psoriasis plaques. The primary purpose of this study is to assess whether dexamethasone sodium phosphate iontophoresis is an effective local therapy for psoriasis. The objective of the study is to determine the efficacy of dexamethasone sodium phosphate iontophoresis for psoriasis.