Safety, Tolerability and Pharmacokinetics of Lumateperone in Pediatric Patients With Autism Spectrum Disorder

- Male or female patients between 5 to less than 13 years of age

- Primary clinical diagnosis of ASD with symptoms of irritability

- ABC-I subscale score of ≥12 at Screening

- CGI-S score of ≥3 at Screening

- Body mass index (BMI) greater than the 5th percentile according to age- and gender-specific CDC Clinical Growth Charts (2000) at Screening

- Ability to swallow capsules

- Has a primary psychiatric diagnosis other than ASD

- Reports suicidal ideation (Type 3, 4 or 5 on the Baseline/Screening version of the C-SSRS) within 6 months prior to Screening, or any suicidal behavior within 2 years prior to Screening, and/or the Investigator assesses the patient to be a safety risk to him/herself or others

- Clinically significant abnormality within 2 years of Screening that in the Investigator's opinion may place the patient at risk or interfere with study outcome variables

- History of a clinically significant cardiac disorder and/or abnormal screening ECG or a QT interval corrected for heart rate using Fridericia formula (QTcF) > 460 msec at Screening

- Patients with a history of orthostatic hypotension or who have orthostatic hypotension at Screening

- Has a history of uncontrolled/disruptive behavior in the past 30 days that, in the Investigator's opinion, would preclude the ability to participate in study procedures