Overview Pilot Study of Varenicline (Chantix®) in the Treatment of Friedreich's Ataxia Status: Terminated Trial end date: 2010-05-01 Target enrollment: Participant gender: Summary The purpose of this study is to determine if varenicline is effective in treating symptoms of Friedreich's ataxia. Phase: Phase 2/Phase 3 Details Lead Sponsor: University of South FloridaCollaborators: Friedreich's Ataxia Research AlliancePfizerTreatments: Varenicline