Evaluation of Safety and Tolerability of Long-term TEV-50717 (Deutetrabenazine) for Treatment of Tourette Syndrome in Children and Adolescents

This is an otherwise open-label, single-arm study (Part A) that includes a 2-week, double-blind, placebo controlled, randomized drug withdrawal period (Part B) followed by a 3 week blinded maintenance or re-titration (Part A resumed), and then a maintenance period. This study aims to evaluate the safety and efficacy of TEV-50717 tablets in patients with tics associated with TS who have previously completed participation in any of the parent studies (SD-809-C-17 \[Phase 1b\], TV50717-CNS 30046 \[Phase 2/3\], or TV50717-CNS 30060 \[Phase 3\]).