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A Study of KarXT + KarX-EC for Treatment of Irritability in Children and Adolescents With Autism Spectrum Disorder

A Phase 3, Multicenter, Randomized, Double-blind, Placebo-controlled Study to Assess the Efficacy, Safety, and Tolerability of KarXT + KarX-EC in Children and Adolescents (5 to 17 Years of Age) With Irritability Associated With Autism Spectrum Disorder

Status
Not yet recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07285798
Enrollment
176
Registered
2025-12-16
Start date
2026-09-11
Completion date
2029-08-06
Last updated
2026-08-24

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Irritability Associated With Autism Spectrum Disorder

Keywords

Autism Spectrum Disorder

Brief summary

The purpose of this study is to assess KarXT + KarX-EC for the treatment of irritability associated with autism in children and adolescents.

Interventions

DRUGKarXT

Specified dose on specified days

Specified dose on specified days

Specified dose on specified days

Sponsors

Bristol-Myers Squibb
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
5 Years to 17 Years
Healthy volunteers
No

Inclusion criteria

* Participants must have a confirmed diagnosis of ASD, as defined by the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR) criteria, confirmed by the K-SADS-PL and must be experiencing symptoms of irritability. * Participants must have an ABC-I ≥18 (Irritability subscale of the ABC) and CGIS specific to irritability ≥4, at screening and baseline (Day 1).

Exclusion criteria

* Participants must not have a current primary DSM-5 diagnosis of bipolar disorder, including bipolar II disorder, schizophrenia, schizoaffective disorder, major depressive episode as determined by clinical instrument, or post-traumatic stress disorder (PTSD). * Exception Include: Participants with comorbid ADHD, provided that attention deficit/hyperactivity disorder (ADHD) is not the primary disorder, the participant is adequately treated and based on the investigator judgment the disorder is clinically stable. * Participants must not have history/presence of clinically significant disease or disorder that would jeopardize participant safety or validity of study results. * Participants must not have a risk for suicidal behavior, and any clinically significant abnormal laboratory test. * Other protocol-defined Inclusion/

Design outcomes

Primary

MeasureTime frame
Change From Baseline in the Aberrant Behavior Checklist Irritability (ABC-I) Score at Week 8Week 8

Secondary

MeasureTime frameDescription
Change From Baseline in the Clinical Global Impression-Severity (CGI-S) Score at Week 8Week 8
Number of Participants With ABC-I response at Week 8Week 8ABC-I response is determined by ≥ 25% reduction in ABC-I score from baseline.
Change From Baseline on the ABC Subscale for Social Withdrawal at Week 8Week 8
Change From Baseline on the Stereotypic Behavior Subscale at Week 8Week 8
Change From Baseline on the Hyperactivity/Noncompliance Subscale at Week 8Week 8
Change From Baseline on the Inappropriate Speech Subscale at Week 8Week 8
Clinical Global Impression-Improvement (CGI-I) Score at Week 8Week 8
Number of Participants With Procholinergic SymptomsUp to approximately 12 weeks
Number of Participants With Anticholinergic SymptomsUp to approximately 12 weeks
Number of Participants With Treatment-emergent Adverse Events (TEAEs)Up to approximately 12 weeks
Number of Participants With Serious Adverse Events (SAEs)Up to approximately 12 weeks
Number of Participants With Adverse Events of Special Interest (AESIs)Up to approximately 12 weeks
Number of Participants With AEs Leading to Discontinuation of Study InterventionUp to approximately 8 weeks

Countries

France, Germany, Hungary, India, Japan, Poland, Puerto Rico, Romania, Spain, United States

Contacts

CONTACTBMS Clinical Trials Contact Center www.BMSClinicalTrials.com
Clinical.Trials@bms.com855-907-3286
CONTACTFirst line of the email MUST contain NCT # and Site #.
STUDY_DIRECTORBristol-Myers Squibb

Bristol-Myers Squibb

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 25, 2026