[Late chronic dyskinesia from neuroleptic drugs (CSF and pharmacological data) (author's transl)].

CSF values of dopamine and serotonine metabolites (homovanillic acid and 5-hydroxy-indoleacetic acid) have been studied in 4 patients suffering from late dyskinesia due to neuroleptics. Trazodone (which acts on all monoaminergic systems, namely noradrenergic, dopaminergic and serotoninergic) induced a marked clinical improvement associated with CSF HVA increase and 5-HIAA decrease. The Authors suggest that involuntary movements could be due to an impairment of 5-HT e DA link.