A Phase 3 Study of NBI-98854 for the Treatment of Tardive Dyskinesia

This is a Phase 3, randomized, double-blind, placebo-controlled, parallel, fixed-dose study to evaluate the efficacy, safety, and tolerability of two doses of NBI-98854 (40 mg and 80 mg) compared to placebo, administered once daily. The study design includes a double-blind, placebo-controlled treatment period for 6 weeks and a double-blind NBI-98854 treatment period for an additional 42 weeks, for a total of 48 weeks of treatment. Final follow-up assessments will be conducted 4 weeks after the last dose of the study drug.