[DRESS syndrome. A clinical case report].

Background: DRESS syndrome (Drug Reaction with Eosinophilia and Systemic Symptoms) or reaction to drugs with eosinophilia and systemic symptoms is a serious drug reaction associated with the use of aromatic anticonvulsants and allopurinol. At least 44 drugs have been associated with DRESS. The aim was to present the case of a patient with DRESS syndrome associated with phenytoin.