SupplementDrug
Theanine clinical trials
- studies test it
- 12
- open now
- 1
- in phase 3
- 1
- first study started
- 2005
Keep track of what changes. Save the theanine studies recruiting or about to start, and get an email each week — studies that open, close, add sites or post results.
Watch these studiesHow studies write it
Studies that test it under each name
Name
Combined with it in one product
Studies by the year they started
12 studies that test it; most in 2011 (3)
| Year | Studies |
|---|---|
| 2005 | 1 |
| 2006 | 1 |
| 2009 | 1 |
| 2011 | 3 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 1 |
| 2025 | 2 |
| 2026 | 1 |
By phase
A phase 1/2 study counts in both.
- Early Phase 1
- 3
- Phase 2
- 1
- Phase 3
- 1
- Phase 4
- 2
- No phase
- 5
What it is tested for
Each study’s main condition, where its own words name it.
Who runs them
Industry 0 · Other 12
Sha'ar Menashe Mental Health Center (2) · Texas Tech University Health Sciences Center (1) · Ulaş Can YILDIRIM (1) · The University of Texas Health Science Center, Houston (1) · Butler Hospital (1) · Texas Tech University (1) · University of Shizuoka (1) · Northumbria University (1)
Often tested with
Tested in the same studies.
Studies
Open first, then newest update. How each study uses theanine is read from its arms, and is right about nine times in ten.
Testing it · 12
- L-Theanine to Support Relaxation and Mood for Cancer Patients in SurveillanceRecruitingEarly Phase 1City of Hope Medical CenterNCT07220447Written as Theanine
- L-theanine and Paraxanthine for Cognitive Improvement in Adults With ADHD and ASDCompletedNot applicableTexas Tech University Health Sciences CenterNCT07189442Written as L-theanine and paraxanthine
- Effects of Caffeine and L-Theanine on Physical and Cognitive Performance in Trained AthletesCompletedNot applicableUlaş Can YILDIRIMNCT07268573Written as L-theanine
- The Effect of the Amino Acid L-Theanine on Alertness and VigilanceCompletedNot applicableThe University of Texas Health Science Center, HoustonNCT01851122Written as L-theanine capsule
- Effects of L-theanine on Motor Cortex Excitability in Healthy Subjects: A Paired-Pulse TMS StudyCompletedEarly Phase 1Butler HospitalNCT04749745Written as L-theanine
- Assessing the Effectiveness of an N-of-1 Platform Using Study of Cognitive EnhancersTerminatedPhase 4Icahn School of Medicine at Mount SinaiNCT04056650Written as L-theanine
- Effects of L-theanine and Caffeine on Attention and Attention-related Brain Activity of Children With Attention Deficit Hyperactivity DisorderCompletedEarly Phase 1Texas Tech UniversityNCT03533556Written as L-theanine
- Pregnenolone and L-theanine Augmentation in the Treatment for Schizophrenia and Schizoaffective DisordersStatus unknownNot applicableSha'ar Menashe Mental Health CenterNCT01831986Written as Pregnenolone and L-Theanine
- Anti-stress Effect of Theanine on Students During Long-term Pharmacy PracticesCompletedNot applicableUniversity of ShizuokaNCT01361204Written as Theanine
- The Effects of Caffeine and L-theanine Both Alone and in Combination on Cerebral Blood Flow, Cognition and MoodCompletedPhase 4Northumbria UniversityNCT00981955Written as Caffeine and L-theanine
- L-Theanine in the Management of SchizophreniaCompletedPhase 3Sha'ar Menashe Mental Health CenterNCT00372151Written as L-Theanine
- Effects of L-Theanine in Boys With ADHDCompletedPhase 2University of British ColumbiaNCT00291070Written as L-theanine
Codes
What other systems call theanine · ClinicalTrials.gg INT002827
- MeSH (NLM) C026166theanineConfirmed ClinicalTrials.gov, NLM
- UNII (FDA) 8021PR16QOTHEANINEConfirmed FDA, NLM, Wikidata
- RxNorm 38022Confirmed FDA, Wikidata
- Wikidata Q909931theanineConfirmed FDA, NLM, Wikidata
- NCI Thesaurus C87348TheanineConfirmed FDA, Wikidata
- DrugBank DB12444One source Wikidata
| System | Code | Name there | Checked by |
|---|---|---|---|
| MeSH (NLM) | C026166 | theanine | Confirmed ClinicalTrials.gov, NLM |
| UNII (FDA) | 8021PR16QO | THEANINE | Confirmed FDA, NLM, Wikidata |
| RxNorm | 38022 | — | Confirmed FDA, Wikidata |
| Wikidata | Q909931 | theanine | Confirmed FDA, NLM, Wikidata |
| NCI Thesaurus | C87348 | Theanine | Confirmed FDA, Wikidata |
| DrugBank | DB12444 | — | One source Wikidata |
“Confirmed” means two independent publishers link the code to this drug; “one source”, one does and its name agrees.