title: Quetiapine in the treatment of focal tardive dystonia induced by other atypical antipsychotics: a report of 2 cases.
abstract: The authors report 2 patients with schizophrenia who developed focal tardive dystonia secondary to treatment with atypical antipsychotics (risperidone, olanzapine). When quetiapine was gradually introduced and other antipsychotics were discontinued, these patients experienced remarkable and sustained improvement of their dystonic symptoms, without loss of psychotic symptom control. The mechanism by which quetiapine may improve tardive dystonia caused by other atypical antipsychotics is unclear. Due to its receptor and pharmacologic profile, quetiapine is the atypical antipsychotic that is most similar to clozapine (without its hematologic side effects), which leads the authors to consider it for the treatment of tardive movement disorders.
authors.affiliation: Department of Psychiatry, Medical School of Patras University, Rion-Patras, Greece. pgourzis@yahoo.gr
authors.forename: Philippos
authors.initials: P
authors.lastname: Gourzis
authors.forename: Panagiotis
authors.initials: P
authors.lastname: Polychronopoulos
authors.forename: Spiridon
authors.initials: S
authors.lastname: Papapetropoulos
authors.forename: Konstantinos
authors.initials: K
authors.lastname: Assimakopoulos
authors.forename: Andreas A
authors.initials: AA
authors.lastname: Argyriou
authors.forename: Stavroula
authors.initials: S
authors.lastname: Beratis
mesh_terms: D000328:Adult; D018726:Anti-Dyskinesia Agents / Q000627:therapeutic use*; D014150:Antipsychotic Agents / Q000009:adverse effects* / Q000627:therapeutic use*; D001569:Benzodiazepines / Q000009:adverse effects; D003987:Dibenzothiazepines / Q000627:therapeutic use*; D004409:Dyskinesia, Drug-Induced / Q000188:drug therapy*; D006801:Humans; D008297:Male; D000077152:Olanzapine; D000069348:Quetiapine Fumarate; D018967:Risperidone / Q000009:adverse effects; D012559:Schizophrenia / Q000150:complications / Q000188:drug therapy
chemical_list: D018726:Anti-Dyskinesia Agents; D014150:Antipsychotic Agents; D003987:Dibenzothiazepines; D001569:Benzodiazepines; D000069348:Quetiapine Fumarate; D018967:Risperidone; D000077152:Olanzapine