A prospective study of tardive dyskinesia development: preliminary results

Preliminary findings from a prospective study of tardive dyskinesia (TD) development in a population of psychiatric patients suggest a TD incidence of 12% after 4 years of cumulative neuroleptic exposure. No cases of abnormal involuntary movements that might be mistaken for TD have been found in patients with no history of neuroleptic exposure. Early findings with regard to risk factors are discussed.