Clinical Trial

L-theanine and Paraxanthine for Cognitive Improvement in Adults With ADHD and ASD

Recruiting
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Record status
This record was last updated February 5, 2026 (before its estimated June 1, 2026 completion). Its status may not reflect the trial's current state.
Summary
This pilot study will test whether combining L-theanine and paraxanthine improves sustained attention, inhibitory control, and overall cognition in adults with ADHD and ASD. Two parallel randomized, single-blinded, repeated-measures crossover trials will be conducted. Participants will complete neuropsychological testing, fMRI scanning, and self-report measures following administration of the L-theanine-paraxanthine combination compared to placebo.
Protocol Amendment History 1 amendment
This ClinicalTrials.gov record has been amended once since 2025-09-16.
Status change: Not Yet Recruiting → Recruiting 2026-02-04
Trial Details
NCT Number NCT07189442
Lead Sponsor Texas Tech University Health Sciences Center
Collaborators: Texas Tech University
Conditions Attention Deficit Hyperactivity Disorder (ADHD), Autism Spectrum Disorder (ASD)
Enrollment 24 participants
Start Date 2025-10-01
Primary Completion 2026-06-01 (estimated)
Study Completion 2026-06-01 (estimated)
Updated on ClinicalTrials.gov 2026-02-05