Safety and Efficacy Study of NBI-98854 in Adults With Tourette Syndrome

Inclusion criteria

• Have a clinical diagnosis of Tourette Syndrome (TS)
• Have at least moderate tic severity
• Have TS symptoms that impair school, occupational, and/or social function
• 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
• Be in good general health
• Have a negative urine drug screen for amphetamines, barbiturates, benzodiazepine, phencyclidine, cocaine, or opiates, and a negative alcohol screen
• 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

• Have an active, clinically significant unstable medical condition within 1 month prior to screening
• Have a known history of long QT syndrome or cardiac tachy-arrhythmia
• Have a known history of neuroleptic malignant syndrome
• Have a cancer diagnosis within 3 years prior to screening (some exceptions allowed)
• Have an allergy, hypersensitivity, or intolerance to VMAT2 inhibitors
• Have a known history of substance dependence, substance (drug) or alcohol abuse
• Have a significant risk of suicidal or violent behavior
• Are currently pregnant or breastfeeding
• Have initiated Comprehensive Behavioral Intervention for Tics (CBIT) during the screening period or at baseline or plan to initiate CBIT during the study
• Have received an investigational drug within 30 days before screening or plan to use an investigational drug (other than NBI-98854) during the study
• Have a blood loss ≥550 mL or donated blood within 30 days prior to screening