Overview A Safety and Efficacy Study of Dimebon in Patients With Huntington Disease Status: Completed Trial end date: 1969-12-31 Target enrollment: Participant gender: Summary The purpose of this study is to determine if Dimebon is safe and effective for the treatment of cognitive impairment in Huntington disease. Phase: Phase 3 Details Lead Sponsor: Medivation, Inc.Collaborator: Pfizer