Lead Sponsor

AbbVie

Age

5 - 17 years

Sex

ALL

Healthy Volunteers

No

•Participants at the time of screening must have a Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) diagnosis of ASD, confirmed by Kiddie Schedule for Affective Disorders and Schizophrenia-Present and Lifetime (K-SADS-PL) administered at screening (Visit 1) by a trained clinician.
•Participants must have an Aberrant Behavior Checklist, 2nd edition - Community Version - Irritability (ABC-I) subscale score ≥ 18 (Visits 1 and 2).
•Participants must have a Clinical Global Impressions - Severity - Irritability (CGI-S Irritability) score ≥ 4 at screening (Visits 1 and 2).

•Participants with diagnosis of intellectual disability (Intelligence quotient \< 25).
•No history of major depressive disorder, bipolar disorder, schizophrenia, schizoaffective disorder, schizophreniform disorder, brief psychotic disorder, or psychotic disorder due to another medical condition, as excluded by administration of Kiddie Schedule for Affective Disorders and Schizophrenia-Present and Lifetime (K-SADS-PL).
•History of ASD that is associated with Rett Disorder, Fragile-X Syndrome, or Childhood Disintegrative Disorder.