Extract of Ginkgo Biloba and Tardive Dyskinesia

Inclusion Criteria

• •Male or female aged 18 to 60yrs
• •Meeting Diagnostic and Statistical Manual of Mental Diseases, Fourth Edition(DSM-IV) criteria for schizophrenia or schizo-affective disorder
• •Abnormal Involuntary Movement Scale (AIMS) score ≥2.
• •Patients from whom informed, written consent is obtained.
• •Patients who have been on a fixed dose of antipsychotic medication for at least 4 weeks prior to trial entry.