Persistence of Effect and Safety of Valbenazine for the Treatment of Tardive Dyskinesia

A Phase 4, Double-Blind, Placebo-Controlled, Randomized Withdrawal Study to Evaluate the Persistence of Effect and Safety of Valbenazine for the Treatment of Tardive Dyskinesia

This is a Phase 4, randomized, double-blind, placebo-controlled study to evaluate the persistence of effect of valbenazine 40 mg and 80 mg.

Inclusion Criteria:

1. Subjects of childbearing potential must agree to use hormonal or two forms of nonhormonal contraception (dual contraception) consistently during the screening, treatment, and follow-up periods of the study.
2. Have one of the following clinical diagnoses for at least 3 months before screening: Schizophrenia, Schizoaffective Disorder, or Mood Disorder
3. Have a clinical diagnosis of neuroleptic-induced TD for at least 3 months before screening.
4. Be on stable doses if using maintenance medication(s) for schizophrenia or schizoaffective disorder, or mood disorder. Subjects with bipolar disorder must be on stable doses of a mood stabilizer.
5. Be in general good health.
6. Have adequate hearing, vision, and language skills to perform the procedures specified in the protocol.

Exclusion Criteria:

1. Have an active, clinically significant unstable medical condition within 1 month before screening.
2. Have a known history of substance (drug) dependence, or substance or alcohol abuse.
3. Have a significant risk of suicidal or violent behavior.
4. Have been hospitalized for psychiatric disorder within 6 months before Day 1.
5. Have a known history of neuroleptic malignant syndrome.
6. Have a known history of long QT syndrome or cardiac arrhythmia.
7. Have a cancer diagnosis within 3 years prior to screening (some exceptions allowed).
8. Are currently taking tetrabenazine or deutetrabenazine, or have used valbenazine (INGREZA) within 30 days of screening.
9. Have received an investigational drug within 30 days before Day 1 or plan to use an investigational drug (other than NBI-98854) during the study.
10. Have a blood loss ≥550 mL or donated blood within 30 days prior to Baseline.
11. Have an allergy, hypersensitivity, or intolerance to VMAT2 inhibitors (eg, tetrabenazine, deutetrabenazine).
12. Are currently pregnant or breastfeeding.
13. Have HIV or hepatitis B.