Overview Extract of Ginkgo Biloba and Tardive Dyskinesia Status: Completed Trial end date: 2007-08-01 Target enrollment: Participant gender: Summary The purpose of this study is to determine whether Extract of Ginkgo Biloba is effective in the treatment on Tardive dyskinesia Phase: Phase 3 Details Lead Sponsor: Beijing HuiLongGuan HospitalCollaborator: Peking University