Pentoxifylline-induced drug rash with eosinophilia and systemic symptoms (DRESS) in a patient with caffeine intolerance.

Background: Drug rash with eosinophilia and systemic symptoms (DRESS) is a severe drug reaction characterised by rash, eosinophilia and systemic involvement.

Main observations: We report a case of DRESS induced by pentoxifylline used for the treatment of severe alcoholic hepatitis, in a patient with longstanding caffeine intolerance. A history of intolerance to caffeine and other methylxanthines is listed as a contraindication to the use of pentoxifylline, yet this precaution is not mentioned in alcoholic hepatitis treatment guidelines.

Conclusions: Prescribers should always seek a history of intolerance to caffeine and related compounds prior to use of pentoxifylline, as severe life threatening reactions can occur.