Safety and Efficacy of NBI-98854 in Pediatric Subjects With Tourette Syndrome

Neurocrine Biosciences

Status and phase: Terminated; Phase 2

Conditions: Tourette Syndrome

Treatments: Drug: Placebo oral capsule; Drug: Valbenazine

Study type: Interventional

Funder types: Industry

Identifiers

NCT03530293

NBI-98854-TS2005

Details and patient eligibility

About

This is a Phase 2, double-blind, placebo-controlled, randomized withdrawal study to evaluate the safety and maintenance of efficacy of an optimized once-daily (qd) dose of NBI-98854 in pediatric subjects with TS.

Enrollment: 81 patients

Sex: All

Ages: 6 to 17 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Have a clinical diagnosis of Tourette Syndrome (TS)
2. Have at least moderate tic severity
3. Have TS symptoms that impair school, occupational, and/or social function
4. If using maintenance medication(s) for TS or TS spectrum diagnoses (e.g. obsessive-compulsive disorder [OCD], Attention-Deficit Hyperactivity Disorder [ADHD]), be on stable doses
5. Be in good general health
6. Adolescent subjects (12 to 17 years of age) must have a negative urine drug screen for amphetamines, barbiturates, benzodiazepine, phencyclidine, cocaine, opiates, or cannabinoids and a negative alcohol screen
7. Subjects of childbearing potential who do not practice total abstinence 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

Exclusion criteria

1. Have an active, clinically significant unstable medical condition within 1 month prior to screening
2. Have a known history of long QT syndrome or cardiac arrhythmia
3. Have a known history of neuroleptic malignant syndrome
4. Have a cancer diagnosis within 3 years prior to screening (some exceptions allowed)
5. Have an allergy, hypersensitivity, or intolerance to VMAT2 inhibitors
6. Have a blood loss ≥250 mL or donated blood within 30 days prior to screening
7. Have a known history of substance dependence, substance (drug) or alcohol abuse
8. Have a significant risk of suicidal or violent behavior
9. Have initiated Comprehensive Behavioral Intervention for Tics (CBIT) during the screening period or at baseline or plan to initiate CBIT during the study
10. Have received an investigational drug within 30 days before screening or plan to use an investigational drug (other than NBI-98854) during the study
11. Have previously participated in an NBI-98854 clinical study, except for NBI-98854-1403 or NBI-98854-1501.
12. Have HIV, hepatitis B, or hepatitis C

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Triple Blind

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81 participants in 3 patient groups, including a placebo group

Pre-randomization Valbenazine

Experimental group

Description:

Participants received valbenazine once daily for up to 12 weeks, depending on if and when randomization occured. The starting dose was 20 mg for participants \<50 kg at baseline and 40 mg for participants ≥50 kg at baseline, and could be escalated in increments of 20 mg every 2 weeks to a maximum of 60 mg for participants \<50 kg and 80 mg for participants ≥50 kg to achieve an optimal dose of valbenazine for each participant.

Treatment:

Drug: Valbenazine

Randomized Placebo

Placebo Comparator group

Description:

Participants received placebo (matching valbenazine) once daily from randomization (Week 8, 10, or 12) through Week 36. Randomization into this arm occurred after treatment with valbenazine once daily through randomization.

Treatment:

Drug: Placebo oral capsule

Randomized Valbenazine

Experimental group

Description:

Participants received their optimized dose of valbenazine once daily from randomization (Week 8, 10, or 12) through Week 36. Randomization into this arm occurred after treatment with valbenazine once daily through randomization.

Treatment:

Drug: Valbenazine