[Neuroleptic malignant syndrome--a case report].

The occurrence of a malignant neuroleptic syndromes accompanied by urinary retention under the treatment with fluphenazine and prothipendyl in a mentally disabled psychotic is reported. Early recognition of the syndrome and immediate termination of the neuroleptic treatment lead to its spontaneous remission. Subsequent neuroleptic treatment by clozapine was tolerated without further complications.