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:
- You are 18 years old or older
- A doctor has diagnosed you with ADHD or ASD (based on what you report)
- If you have been diagnosed with both ADHD and ASD, you may still participate, but you would be placed in the ASD group for the purposes of the study
Who may not be able to join:
- You have serious vision or hearing problems that could make it hard to complete thinking or memory tasks
- You are unable to read and follow written instructions
- You have a physical, neurological, intellectual, or mental health condition (other than ADHD or ASD) that could affect your thinking or movement
- You currently take antidepressants, antipsychotics, or other medications that might affect how you perform on tasks (confirm with trial site)
- You take medications that could interact with the substances used in the study, including anything that affects your vision, hearing, thinking, or movement — except stimulant medications (confirm with trial site)
- You have had a head injury that caused you to lose consciousness, or you have had brain surgery
- You have ever had a bad reaction to products containing caffeine, paraxanthine, L-theanine, or corn starch
- You are unwilling or unable to avoid foods or drinks containing caffeine, L-theanine, or paraxanthine for 24 hours before each study visit
- You have taken medications or drugs containing caffeine, or certain related compounds, in the past 3 months (confirm with trial site)
- You have taken medications known to interact with a substance called paraxanthine in the past 3 months (confirm with trial site)
- You have a current or past diagnosis of tics or uncontrolled movements
- You have a history of headaches, drowsiness, anxiety, sleep problems, or nausea after consuming caffeine or caffeine-containing drinks
- You currently or previously smoked, or have a history of alcohol or drug misuse
- You are unable to have an MRI scan based on a standard safety screening (confirm with trial site)
- You are unwilling or unable to avoid using electronic devices during study visits
- You are unwilling or unable to follow written, on-screen, or verbal instructions from the research team
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
Phone: 806-743-2378
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
fMRI task-related activity; Stop Signal Reaction Time; d-prime (sensitivity to the Go signal)
Can't join this trial?
Data last synced from ClinicalTrials.gov: 23 July 2026. Trial status can change. Always verify current status directly with the trial site before making any decision.