Overview Persistence of Effect and Safety of Valbenazine for the Treatment of Tardive Dyskinesia Status: Completed Trial end date: 2020-01-30 Target enrollment: Participant gender: Summary This is a Phase 4, randomized, double-blind, placebo-controlled study to evaluate the persistence of effect of valbenazine 40 mg and 80 mg. Phase: Phase 4 Details Lead Sponsor: Neurocrine BiosciencesTreatments: Tetrabenazine