NCT05916339

Brief Summary

This study is a pragmatic clinical trial examining the comparative effectiveness of two stimulant medications (methylphenidate and amphetamine) in the treatment of ADHD in children and adolescents with autism. Using a sequential, multiple assignment randomization trial (SMART) design the study will not only assess these two medications but also the role of an increasingly popular class of ADHD medication, the alpha-2 agonists. Findings from this study will help improve clinicians' approach to medication selection and reduce the repeated trials of multiple medications that are current standard care.

Trial Health

80
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
500

participants targeted

Target at P75+ for phase_4

Timeline
20mo left

Started Oct 2023

Longer than P75 for phase_4

Geographic Reach
2 countries

12 active sites

Status
recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress61%
Oct 2023Dec 2027

First Submitted

Initial submission to the registry

May 31, 2023

Completed
23 days until next milestone

First Posted

Study publicly available on registry

June 23, 2023

Completed
3 months until next milestone

Study Start

First participant enrolled

October 1, 2023

Completed
3.3 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

January 1, 2027

Expected
12 months until next milestone

Study Completion

Last participant's last visit for all outcomes

December 30, 2027

Last Updated

October 29, 2025

Status Verified

October 1, 2025

Enrollment Period

3.3 years

First QC Date

May 31, 2023

Last Update Submit

October 27, 2025

Conditions

Keywords

ADHDAutismASD

Outcome Measures

Primary Outcomes (1)

  • The Vanderbilt Parent Rating Scale

    The primary outcome measure is The Vanderbilt Parent Rating Scale for ADHD consists of 18 item, each scored from 0 to 3. It has a minimum score of 0, maximum score of 54. Higher scores indicate worse outcome.

    16 Weeks

Secondary Outcomes (2)

  • Parent reported Clinical Global Impression

    16 Weeks

  • Aberrant Behavior Checklist- Hyperactivity/Impulsivity subscale

    16 Weeks

Study Arms (2)

Stage 1 - Stimulant

ACTIVE COMPARATOR

This proposed naturalistic, pragmatic clinical trial does not involve investigational drugs. Sequential, multiple assignment randomized trial (SMART) pragmatic clinical trial. Stage 1 - randomization to either Amphetamine (AMP) or Methylphenidate (MPH). The specific medication prescribed by the physician will be determined by discussion between physician and parent / caregiver and review of the subject's insurance coverage. Subjects will receive their medication from their pharmacy.

Drug: Randomization to either Amphetamine (AMP) class of stimulant medication or Methylphenidate (MPH) class of stimulant medication

Stage 2 - Alpha-2 Agonist or Alternate Stimulant

ACTIVE COMPARATOR

Stage 2 - randomization to either Alpha-2 Agonist or other stimulant not randomized to in Stage 1: Amphetamine (AMP) or Methylphenidate (MPH). (frequency, dosage, format, and duration dependent on participant and study doctor discussion).

Drug: Randomization to either Alpha 2 agonist class of medication or alternate class of stimulant.

Interventions

Amphetamine (AMP) medication names: Adderall, Adderall XR, Adzenys ER, Adzenys XR-ODT, Dayanavel XR, Dexedrine (spansule), Dexedrine (tablet), Mydayis, Procentra liquid Methylphenidate (MPH) medication names: Adhansia XR, Aptensio XR, Azstarys, Concerta, Cotempla XR-ODT, Daytrana, Focalin, Focalin XR, Jornay PM. Metadate CD, Methylin (liquid), Ritalin, Ritalin LA, Quillichew ER, Quillivant XR (liquid)

Stage 1 - Stimulant

If first line stimulant therapy (Amphetamine/Methylphenidate) is deemed not effective or tolerable, re-randomization to the alternate stimulant or alpha-2 agonist will occur. If participant is satisfied with first line stimulant treatment, first-line stimulant therapy will continue. Catapres, Clonidine, Guanfacine, Intuniv, Kapvay, Tenex

Stage 2 - Alpha-2 Agonist or Alternate Stimulant

Eligibility Criteria

Age4 Years - 17 Years
Sexall
Healthy VolunteersNo
Age GroupsChild (0-17)

You may qualify if:

  • Participant and/or legal caregiver must be willing and able to give informed consent/assent for participation in this study.
  • Participant and/or legal caregiver must be willing and able (in the Investigator's opinion) to comply with all study requirements.
  • Participant must be between 4 and 17 years of age (inclusive) at time of enrollment.
  • Participant must have a confirmed diagnosis of ASD based on supportive evidence (e.g. referring physician's report, medical records, such as ADOS or CARS, etc.).
  • Participant must have the ability to consistently take medication (via pill, liquid or mixed with food/liquid).
  • Participant must have a confirmed diagnosis of ADHD (based upon DSM-5 criteria and supportive evidence).
  • Participant must have a consistent reporter (e.g., parent) who spends regular time with the child.
  • Participant can be on other psychotropic medications (selective serotonin reuptake inhibitor (SSRI), atypical antipsychotic, anticonvulsant) if dose has been stable for \> 4 weeks prior to consent with no plans for a dose change during the study.
  • It has been at least 7 days since the participant last took an ADHD medication and the presiding clinician believes this to be a sufficient amount of time.
  • Caregiver must be sufficiently fluent in English or Spanish to be able to complete questionnaires relevant to this study.

You may not qualify if:

  • Participant has taken ADHD medication within the past 7 days.
  • Participant is not stable on other medications (\< 4 weeks).
  • Any other risk factor that might prevent patient from safely taking the study medications.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (12)

University of California, Irvine

Irvine, California, 92697, United States

RECRUITING

Children's Hospital Los Angeles

Los Angeles, California, 90027, United States

RECRUITING

Maine Medical Center

Portland, Maine, 04102, United States

RECRUITING

Massachusetts General Hospital Lurie Center for Autism

Boston, Massachusetts, 02421, United States

RECRUITING

University of Rochester

Rochester, New York, 14642, United States

RECRUITING

Cincinnati Children's Hospital Medical Center

Cincinnati, Ohio, 45229, United States

RECRUITING

Nationwide Children's Hospital

Columbus, Ohio, 43205, United States

RECRUITING

Children's Hospital of Philadelphia

Philadelphia, Pennsylvania, 19178, United States

RECRUITING

University of Pittsburgh

Pittsburgh, Pennsylvania, 15262, United States

RECRUITING

University of Virginia

Charlottesville, Virginia, 22903, United States

RECRUITING

University of Alberta, Glenrose Rehabilitation Hospital

Edmonton, Canada

RECRUITING

Holland Bloorview Kids Rehabilitation Hospital

Toronto, Canada

RECRUITING

Related Publications (78)

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MeSH Terms

Conditions

Attention Deficit Disorder with HyperactivityAutism Spectrum DisorderAutistic Disorder

Interventions

Adenosine MonophosphateMethylphenidate5,10-dihydro-5-methylphenazine

Condition Hierarchy (Ancestors)

Attention Deficit and Disruptive Behavior DisordersNeurodevelopmental DisordersMental DisordersChild Development Disorders, Pervasive

Intervention Hierarchy (Ancestors)

Adenine NucleotidesPurine NucleotidesPurinesHeterocyclic Compounds, 2-RingHeterocyclic Compounds, Fused-RingHeterocyclic CompoundsNucleotidesNucleic Acids, Nucleotides, and NucleosidesRibonucleotidesPhenylacetatesAcids, CarbocyclicCarboxylic AcidsOrganic ChemicalsPiperidinesHeterocyclic Compounds, 1-Ring

Study Officials

  • Daniel Coury, MD

    Nationwide Children's Hospital

    PRINCIPAL INVESTIGATOR
  • Karen Kuhlthau, PhD

    Massachusetts General Hospital

    PRINCIPAL INVESTIGATOR

Central Study Contacts

Study Design

Study Type
interventional
Phase
phase 4
Allocation
RANDOMIZED
Masking
NONE
Purpose
HEALTH SERVICES RESEARCH
Intervention Model
PARALLEL
Sponsor Type
OTHER
Responsible Party
SPONSOR INVESTIGATOR
PI Title
Behavioral Pediatrics Physician

Study Record Dates

First Submitted

May 31, 2023

First Posted

June 23, 2023

Study Start

October 1, 2023

Primary Completion (Estimated)

January 1, 2027

Study Completion (Estimated)

December 30, 2027

Last Updated

October 29, 2025

Record last verified: 2025-10

Data Sharing

IPD Sharing
Will not share

IPD will not be shared.

Locations