Lamotrigine induced drug reaction with eosinophilia and systemic symptoms (DRESS) presenting with eosinophilic pan-colitis, cholestasis and cytomegalovirus reactivation.

The drug reaction with eosinophilia and systemic symptoms (DRESS) syndrome is an idiosyncratic drug-induced reaction that primarily affects the liver, lungs, and kidneys. While several organs are commonly involved, the incidence of DRESS affecting the gastrointestinal tract is rarely reported. We present a 72-year-old man with a history of epilepsy who developed DRESS syndrome manifested by eosinophilic pancolitis, cholestasis, and reactivation of cytomegalovirus (CMV) following the initiation of lamotrigine.