The prevalence of tardive dyskinesia after a nine month naturalistic randomized trial comparing olanzapine with conventional treatment for schizophrenia and related disorders.

Aims Of The Study: To assess the impact of olanzapine versus conventional neuroleptic therapy among subjects with schizophrenia on ratings of tardive dyskinesia (TD).

Method: The naturalistic study was conducted in three psychiatric hospitals in Brazil. Patients had a diagnosis of schizophrenia and related disorders (DSMIV) and with a BPRS score>24.