# Effects of L-theanine and Caffeine on Attention and Attention-related Brain Activity of Children With Attention Deficit Hyperactivity Disorder

> **NCT03533556** · EARLY_PHASE1 · COMPLETED · sponsor: **Texas Tech University** · enrollment: 6 (actual)

## Conditions studied

- Attention Deficit Hyperactivity Disorder

## Interventions

- **DIETARY_SUPPLEMENT:** L-theanine
- **DIETARY_SUPPLEMENT:** Caffeine
- **DIETARY_SUPPLEMENT:** L-theanine-Caffeine Combination
- **OTHER:** Placebo

## Key facts

- **NCT ID:** NCT03533556
- **Lead sponsor:** Texas Tech University
- **Sponsor class:** OTHER
- **Phase:** EARLY_PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2018-05-14
- **Primary completion:** 2018-08-31
- **Final completion:** 2018-08-31
- **Target enrollment:** 6 (ACTUAL)
- **Last updated:** 2019-04-12

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03533556

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03533556, "Effects of L-theanine and Caffeine on Attention and Attention-related Brain Activity of Children With Attention Deficit Hyperactivity Disorder". Retrieved via AI Analytics 2026-07-19 from https://api.ai-analytics.org/clinical/NCT03533556. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*