Clomipramine-induced hypersensitivity syndrome with unusual clinical features.

Drug-induced hypersensitivity syndrome is a severe drug eruption with fatal visceral organ failures associated with human herpesvirus-6 (HHV-6) reactivation. We present a case of clomipramine-induced hypersensitivity syndrome, which displayed in succession two different reactions akin to those described for Gianotti-Crosti syndrome and infectious mononucleosis. HHV-6 reactivation was confirmed serologically after the latter reaction, suggesting that our case may have represented a biphasic reaction to HHV-6 reactivation.