Phase 4 ADHD Trial, Recruiting
Who may be able to join
AI generated eligibility summary. Written by an AI model from the official source data and checked on a sample basis. It can contain mistakes, so confirm anything important against the original source. How we use AI
Who might be able to join this trial:
- Children who are between 4 years 0 months and 5 years 9 months old at the first visit, and are considered generally healthy
- A parent or legal guardian must be willing and able to sign a consent form before any study activities begin
- Children who have been formally diagnosed with ADHD using standard diagnostic tools (DSM-IV-TR criteria confirmed with a structured interview called the K-SADS-PL)
- Children whose ADHD symptom scores on a standard rating scale meet or exceed a set threshold (28 or higher for boys, 24 or higher for girls) at both the screening and baseline visits
- Children whose ADHD is rated as "moderate or worse" on a standard severity scale at both the screening and baseline visits
- Children who have either tried a non-medication approach to managing ADHD without enough improvement, or whose symptoms are severe enough that the treating doctor considers medication appropriate without first trying non-medication approaches
- Children who take part in a structured group activity outside the home (such as preschool, kindergarten, sports, childcare, or similar programs) at least 2 days per week during the study
- Children who have not started any new behavioural therapy within 30 days before the screening visit, and whose behavioural therapy plans are not expected to change during the study
- Children currently on ADHD medication whose symptoms are still not well controlled, provided they stop taking that medication at least 7 days before the baseline visit and meet all other criteria
- Children with no current health condition that, in the investigator's opinion, would interfere with study results or increase risk
- Children who have lived with the same parent(s) or guardian(s), or under a shared custody arrangement, for at least 6 months before the screening visit
- Children whose body weight is at or above the 5th percentile for their age and sex at both the screening and baseline visits
Who may not be able to join:
- Children whose primary diagnosis is a psychiatric condition other than ADHD, or who have a secondary psychiatric condition that the investigator believes would interfere with the study
- Children with a current major neurological disorder; those with a history of seizures, seizure-like events, a family history of seizure disorder, or febrile seizures will be assessed individually (confirm with trial site)
- Children who have a parent or sibling diagnosed with Bipolar Disorder
- Children with a history of global developmental delay or intellectual disability
- Children with a significant ongoing physical health condition, as determined by the investigator
- Children whose body mass index (BMI) is above the 95th percentile for their age and sex at the screening or baseline visit
- Children with blood pressure and pulse rate both above the 95th percentile for their age, sex, and height at the screening or baseline visit
- Children with a clinically significant heart rhythm finding on an ECG at the screening visit
- Children who have previously taken the study drug (SPN-812/viloxazine), stopped it due to lack of effect or side effects, or have had an allergic or intolerance reaction to it
- Children who are unable to swallow pudding or applesauce and also cannot swallow a capsule whole
- Children with a food allergy, intolerance, or dietary restriction that the investigator believes would interfere with participation
- Children who have taken part in another clinical drug study within 30 days (or 5 half-lives of that drug, whichever is longer) before the baseline visit
- Children who test positive for drugs in a urine test at the screening visit (a positive result for stimulants is allowed only if the child is currently prescribed a stimulant ADHD medication and stops taking it at least 7 days before the baseline visit)
- Children who are taking certain medications that interact with the study drug, including medications classified as CYP1A2 substrates (such as theophylline or melatonin) (confirm with trial site for a full list)
- Children who have had thoughts of suicide or suicidal behaviour in the 6 months before the screening visit, or who have ever made a suicide attempt
- Children who, for any other reason, the investigator believes should not participate
Important: Always verify eligibility with the trial site directly before applying.
Based on publicly available eligibility criteria from ClinicalTrials.gov. Verify directly with the trial site before acting. This is not medical advice.
Contact this trial
Principal Investigator: Jonathan Rubin, MD, MBA, Supernus Pharmaceuticals, Inc.
Phone: 240-403-5324
Contact details sourced from ClinicalTrials.gov. Verify directly with the trial site before attending.
GP referral letter
Print a one-page summary to share with your doctor.
Trial details
Where this trial is recruiting
Primary endpoints
Change from Baseline in the Attention-Deficit/Hyperactivity Disorder Rating Scale, 4th Edition, Preschool Version (ADHD-RS-IV-P) Total Score at End of Study (Week 6)
Can't join this trial?
Data last synced from ClinicalTrials.gov: 28 July 2026. Trial status can change. Always verify current status directly with the trial site before making any decision.