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Efficacy, Safety & Pharmacokinetic (PK) Study of HLD200 in Children Aged 4-5 Years With ADHD | Clinical Trials | Clareo Health

TERMINATEDPHASE3

Efficacy, Safety & Pharmacokinetic (PK) Study of HLD200 in Children Aged 4-5 Years With ADHD

Phase 3, Multicenter, 3-Week Fixed-dose, Randomized, Double-blind, Placebo-controlled, Parallel-group Efficacy, Safety and PK Study of Evening Dosed Methylphenidate Hydrochloride ER Capsules (HLD200) in Children Aged 4-5 Years With ADHD

NCT06431256•Ironshore Pharmaceuticals and Development, Inc

View on ClinicalTrials.gov

Summary

This study will evaluate the efficacy, safety and pharmacokinetics of HLD200 (20 mg and 40 mg) in children aged 4 to 5 years with ADHD.

Detailed Description

This is a multicenter, 3 week fixed dose, randomized, double-blind, placebo-controlled, parallel group study to evaluate the efficacy, safety and pharmacokinetics of HLD200 (20 mg and 40 mg) in children aged 4 to 5 years with ADHD. Participants will be screened for eligibility for up to 4 weeks. Eligible participants will be treated with study medication for 3 weeks followed by a 2 week safety follow-up following the end of study treatment. The total duration of the study is up to 9 weeks. A single pharmacokinetic (PK) sample will be taken from each participant, in a prespecified PK sampling window at visit 5, for population PK analysis. A total of 168 participants (56 per treatment arm) will be randomized at Visit 2.

Eligibility

Age

4 - 5 years

Sex

ALL

Healthy Volunteers

Inclusion Criteria

•1. The subject's assigned caregiver must be able to read, write, and/or understand at a level sufficient to provide informed consent and will provide this written consent (and subject will provide assent, if required by the IRB) before any study-specific activity is performed.
•2. Subjects must be male or female children 4 to 5 years of age at the time of consent and assent (if applicable).
•3. Subjects must have a diagnosis of ADHD as defined by the DSM-5 criteria with confirmation using the Mini - International Neuropsychiatric Interview for Children and Adolescents (MINI KID).
•4. All subjects must have an ADHD-RS-IV Preschool Version Parent Total Score of ≥28 for boys or ≥24 for girls at Baseline (Visit 2). In addition, subjects not receiving pharmacotherapy for ADHD at time of consent must have an ADHD-RS-IV Preschool Version Parent Total Score of ≥28 for boys or ≥24 for girls at Screening; if the ADHD-RS-IV total score at Screening differs from the score at Baseline (Visit 2) by greater than 20% for these subjects (i.e., subjects who are not receiving ADHD pharmacotherapy at time of consent), the Investigator must investigate the reasons for the difference in score and determine whether the subject is an appropriate candidate to participate in the study.
•5. Subjects not receiving pharmacotherapy for ADHD at time of consent must have a Clinical Global Impression - Severity (CGI-S) score ≥4 at Screening. All subjects must have a CGI-S score of ≥4 at Baseline (Visit 2).
•6. Subjects must have a Peabody Picture Vocabulary Test 4 (PPVT-4) Standard Score ≥70 at Screening.
•7. Subject has undergone an adequate course of nonpharmacologic treatment or has a severe enough condition in the opinion of the Investigator to consider enrollment without undergoing prior nonpharmacological treatment.
•8. Subject's weight at Screening is between the 5th and 95th percentiles and subject's height at Screening is ≥ 5th percentile according to the Centers for Disease Control and Prevention growth charts by age and sex.
•9. Subject must have a resting pulse less than 127 bpm, systolic and diastolic blood pressure below the 95th percentile for age, gender and height according to the 2017 American Academy of Pediatrics guidelines, based on the average of 3 measurements 2 to 5 minutes apart at Visit 1 and Visit 2 (only a single measurement is required at Visit 2 unless an elevated excursion is noted which requires the averaged value of triplicate measurements). If a subject's height is above the 95th percentile, the subject must meet the systolic and diastolic blood pressure criteria for the 95th percentile height.
•10. Subject must be considered clinically appropriate for treatment with HLD200.
+2 more criteria

Exclusion Criteria

•1. History of, or current, medical or psychiatric condition, including gastrointestinal disorders (e.g., surgery, malabsorption syndrome, and other similar conditions), open-angle glaucoma, abnormally increased intraocular pressure (IOP), or laboratory result that, in the opinion of the Investigator, unfavorably alters the risk-benefit of study participation, may jeopardize subject safety, or may interfere with the satisfactory completion of the study and study related procedures.
•2. Serious structural cardiac abnormalities, cardiomyopathy, serious heart rhythm abnormalities, severe hypertension, untreated thyroid disease, peripheral vasculopathy, known structural cardiac disorders, serious cardiac conditions, serious arrhythmias, known family history of sudden death, or other cardiac problems that may place the subject at increased vulnerability to the sympathomimetic effects of a stimulant drug.
•3. History of, or current, seizure disorder (except febrile seizures prior to age 4 and with last occurrence at least 1 year prior to study participation) or intellectual disability of mild severity or greater (DSM-5 criteria).
•4. Past or current diagnosis of psychosis, bipolar I or II disorder, major depressive disorder, eating disorder, conduct disorder, obsessive-compulsive disorder, autism spectrum disorder, Tourette's Syndrome or other tic disorders, disruptive mood dysregulation disorder, or confirmed genetic disorder with cognitive and/or behavioral disturbances. Subjects with oppositional defiant disorder (ODD) or anxiety disorder (e.g., separation anxiety disorder simple phobia disorder) are permitted to enroll in the study provided these diagnoses are not the primary focus of treatment, and, in the opinion of the Investigator, are not anticipated to interfere with study assessments or procedures.
•5. Subject is currently considered at risk of suicide in the opinion of the Investigator, or has previously made a suicide attempt, or has a history of, or is currently demonstrating active suicidal ideation or behavior, as determined by the C-SSRS at Screening and/or Baseline (Visit 2).
•6. History of severe allergic reaction or intolerance to methylphenidate hydrochloride (MPH).
•7. Alanine aminotransferase, aspartate aminotransferase, total bilirubin, or creatinine greater than 1.5 times the upper limit of normal. Elevated bilirubin due to Gilbert's syndrome is not exclusionary.
•8. Use of ADHD stimulant medication within 72 hours (3 days) prior to Baseline (Visit 2); clonidine and guanfacine within 5 days prior to Baseline (Visit 2); psychotropic medications, including antidepressants (including MAOIs), mood stabilizers, and antipsychotics, within 14 days prior to Baseline (Visit 2); other prescription medications (including atomoxetine, excluding allowed medications) within 7 days prior to Baseline (Visit 2); and nonprescription/over-the-counter medications (excluding allowed medications) or herbal medications within the 3 days prior to Baseline (Visit 2). Medications not covered in allowed medications or prohibited medications must be cleared by the Medical Monitor prior to randomizing the subject.
•9. Participation in a clinical trial with an investigational drug within the 30 days prior to Baseline (Visit 2).
•10. Initiation of non-pharmacological treatment within 30 days prior to Baseline (Visit 2) or expected to initiate new non-pharmacological treatment during the study.
+5 more criteria

Locations (13)

Harmonex, Inc.

Dothan, Alabama, United States

Advanced Research Center, Inc.

Anaheim, California, United States

Clinical Neuroscience Solutions, Inc.

Jacksonville, Florida, United States

South Florida Research

Miami Springs, Florida, United States

Clinical Neuroscience Solutions, Inc.

Orlando, Florida, United States

CenExel iResearch, LLC

Decatur, Georgia, United States

DelRicht Research

New Orleans, Louisiana, United States

Midwest Research Group

Saint Charles, Missouri, United States

Alivation Research, LLC

Lincoln, Nebraska, United States

Vector Clinical Trials

Las Vegas, Nevada, United States

Key Dates

Start Date

September 13, 2024

Primary Completion Date

July 11, 2025

Completion Date

July 11, 2025

Last Updated

November 6, 2025

Enrollment

ACTUAL participants

Conditions

Attention Deficit Hyperactivity Disorder

Interventions

HLD200 methylphenidate hydrochloride capsules

DRUG

Placebo HLD200 capsules

DRUG

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Data Source & Attribution

This clinical trial information is sourced from ClinicalTrials.gov, a service of the U.S. National Institutes of Health.

ClinicalTrials.gov last update: November 6, 2025Data synced to Clareo: March 29, 2026

Modifications: This data has been reformatted for display purposes. Eligibility criteria have been parsed into inclusion/exclusion sections. Location data has been geocoded to enable distance-based search. For the authoritative and most current information, please visit ClinicalTrials.gov.

Neither the United States Government nor Clareo Health make any warranties regarding the data. Check ClinicalTrials.gov frequently for updates.

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Efficacy, Safety & Pharmacokinetic (PK) Study of HLD200 in Children Aged 4-5 Years With ADHD

Inclusion Criteria

Exclusion Criteria

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