L-Theanine Ingredients & Drug Interactions
What is this page for?
First and foremost: checking L-Theanine against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.
Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy
L-Theanine is a dietary supplement by BulkSupplements.com with 1 active ingredient. Its ingredients are commonly taken for anxiety and stress, relaxation and calm, sleep support.Based on those ingredients, 565 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are L-Theanine. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against L-Theanine by BulkSupplements.com
Ask about any prescription or over-the-counter medication and we check it for interactions with L-Theanine by BulkSupplements.com — and tell you which ingredient is responsible.
AI summaries are generated from our interaction database for education only — always confirm with your pharmacist. How we use AI
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HelloPharmacist Scorecard of L-Theanine by BulkSupplements.com
Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.
What’s inside
Full disclosure
This is a straight-up single-ingredient product: L-theanine, an amino acid that naturally occurs in tea leaves. It's the one active ingredient, and it comes as a powder with no other fillers or additives listed.
Does it work?
Moderate evidence
The evidence here is limited. L-theanine is possibly effective for cognitive function — meaning some data suggests a benefit, but we'd like more.
For everything else we have data on — age-related cognitive decline, Alzheimer's disease, generalized anxiety, OCD, and cancer — there isn't enough reliable evidence to know if it works. That doesn't mean it doesn't; it just means the research isn't solid enough to say yet.
How safe is it?
Well-documented data
L-theanine is generally well tolerated in healthy adults for short-term use, though long-term safety isn't well studied. Side effects can include headaches, drowsiness, longer sleep, and more vivid dreams.
There's one old report of facial tics in a child, but the tics went away when the supplement stopped, and the child had a history of tics anyway, so it's not clear theanine caused it. For pregnancy and breastfeeding, there isn't enough safety data, so it's best to avoid it during both.
Meds to double-check
Moderate interaction found
Before you start, check your blood pressure medications — theanine could potentiate their effect. Also flag any CNS depressants you're taking (sleep aids, anxiety meds) and any serotonergic drugs, though that last risk is very low and no actual cases have been reported.
The bottom line
Scorecard at a glanceFully disclosed formula with some supporting evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.
L-theanine might be worth trying if you're looking for a cognitive edge and you're generally healthy. If you take blood pressure medication or sedating drugs, check with your pharmacist first — theanine could amplify their effects.
Talk to your pharmacist if you're pregnant, nursing, or on any regular medication.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated May 23, 2024.
This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed
General information
Key facts about L-Theanine, straight from the product label.
| Brand | BulkSupplements.com |
|---|---|
| Barcode (UPC) | X000HFGPLH |
| Net contents | 500 Gram(s); 17.6 Ounce(s) |
| Market status | On market |
| Date entered into DSLD | May 23, 2024 |
| DSLD ID | 312276 |
| Product type | Non-nutrient/non-botanical |
| Supplement form | Powder |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Gluten Free, Dairy Free |
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.
Supplement Facts
The label details for L-Theanine by BulkSupplements.com, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| L-Theanine | 200 mg | -- |
Tap any ingredient to jump to its full detail below.
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Brand IP Statement(s)
BulkSupplements.com Clean & Pure Bulk Supplements
Formulation
Free of: Added sugar, soy, dairy, yeast, gluten, additives
Suggested/Recommended/Usage/Directions
Suggested use: As a dietary supplement, take 200 mg once or twice daily, or as directed by a physician.
General Statements
Use an accurate milligram scale.
New
Storage
Contents are sold by weight, not volume. Settling may occur. Store in a dry, cool place
FDA Disclaimer Statement
Warning: This product is not intended to diagnose, treat, cure, or prevent any disease.
Precautions
Always consult a physician before taking any dietary supplement.
Keep out of reach of children.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
L-Theanine by BulkSupplements.com label
The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.
Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.
View the full label (PDF)The Ingredients in L-Theanine by BulkSupplements.com
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size200 mg Dosage formPowder Servings per container2500 Amounts shown are per serving.
L-Theanine
Interacts with565 drugs
Theanine (usually L-theanine) is an amino acid found naturally in tea leaves that many people take to feel calmer and less stressed without strong dro...
L-Theanine monograph & interactionsL-Theanine by BulkSupplements.com Drug Interactions
HelloPharmacist Interaction Report
L-Theanine by BulkSupplements.com interacts with a couple of drug categories worth knowing about before you start.
Read the full breakdown — every affected drug type, severity by severity
The main one is blood pressure medications (antihypertensive drugs). Theanine can lower blood pressure on its own, and animal studies suggest it might strengthen the effect of your BP meds.
If you're on a blood pressure drug, that's worth a conversation with your doctor or pharmacist before you add this in.
Second, there's a theoretical concern with CNS depressants — drugs like sleep aids or anti-anxiety medications. Theanine might pile on the drowsiness, though we're not sure how much this matters in real life.
And while some studies hint theanine could affect serotonin levels, no one's actually reported serotonin syndrome from it, so that risk is pretty low.
Already, these interactions span 563 individual medications. Use the medication checker on this page to see if anything you take is in the mix.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against L-Theanine?
Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.
Go to the checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in L-Theanine interact with 565 drugs. Click any drug to see the details.
1 of the 1 ingredient in L-Theanine interact with drugs. Each result below shows which ingredient is responsible. L-Theanine
Aspirin, Codeine PhosphateAspirin w/ Codeine
How Aspirin, Codeine Phosphate interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Aspirin, Codeine Phosphate interactionAspirin, Codeine Phosphate, MethocarbamolRobaxisal C
How Aspirin, Codeine Phosphate, Methocarbamol interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Aspirin, Codeine Phosphate, Methocarbamol interactionAspirin, Codeine Phosphate, PhenobarbitalPhenaphen
How Aspirin, Codeine Phosphate, Phenobarbital interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Aspirin, Codeine Phosphate, Phenobarbital interactionAspirin, Diphenhydramine, PhenylpropanolamineAlka Seltzer Plus Night Time Effervescent
How Aspirin, Diphenhydramine, Phenylpropanolamine interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Aspirin, Diphenhydramine, Phenylpropanolamine interactionAspirin, Ethoheptazine, MeprobamateEquagesic
How Aspirin, Ethoheptazine, Meprobamate interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Aspirin, Ethoheptazine, Meprobamate interactionAspirin, HydrocodoneAlor 5 500, Lortab ASA
How Aspirin, Hydrocodone interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Aspirin, Hydrocodone interactionAspirin, OxycodonePercodan
How Aspirin, Oxycodone interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Aspirin, Oxycodone interactionAspirin, PentazocineTalwin Compound
How Aspirin, Pentazocine interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Aspirin, Pentazocine interactionAtropine, Benzoic Acid, Hyoscyamine, Methenamine, Methylene Blue, PhenylAtrosept
How Atropine, Benzoic Acid, Hyoscyamine, Methenamine, Methylene Blue, Phenyl interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineSerotonergic Drugs Minor
Interaction Summary
Clinical studies regarding the effects of L-theanine on serotonin levels are conflicting.
Read the full L-theanine + Atropine, Benzoic Acid, Hyoscyamine, Methenamine, Methylene Blue, Phenyl interactionAtropine, Benzoic Acid, Hyoscyamine, Methenamine, Methylene Blue, Phenyl SalicylateUrinary Antiseptic 2, Urised
How Atropine, Benzoic Acid, Hyoscyamine, Methenamine, Methylene Blue, Phenyl Salicylate interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineSerotonergic Drugs Minor
Interaction Summary
Clinical studies regarding the effects of L-theanine on serotonin levels are conflicting.
Read the full L-theanine + Atropine, Benzoic Acid, Hyoscyamine, Methenamine, Methylene Blue, Phenyl Salicylate interactionAtropine, Chlorpheniramine, Hyoscyamine, Phenylephrine, Phenylpropanolamine, ScopolamineAtrohist Plus, Pro Tuss, Ru-tuss, Stahist
How Atropine, Chlorpheniramine, Hyoscyamine, Phenylephrine, Phenylpropanolamine, Scopolamine interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineSerotonergic Drugs Minor
Interaction Summary
Clinical studies regarding the effects of L-theanine on serotonin levels are conflicting.
Read the full L-theanine + Atropine, Chlorpheniramine, Hyoscyamine, Phenylephrine, Phenylpropanolamine, Scopolamine interactionAtropine, Hyoscyamine, PhenobarbitalHypnaldyne
How Atropine, Hyoscyamine, Phenobarbital interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Atropine, Hyoscyamine, Phenobarbital interactionAtropine, Hyoscyamine, Phenobarbital, ScopolamineBarbidonna No. 2, Belladonna Phenobarbital
How Atropine, Hyoscyamine, Phenobarbital, Scopolamine interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Atropine, Hyoscyamine, Phenobarbital, Scopolamine interactionAtropine, Hyoscyamine, Scopolamine, PhenobarbitalBarbeloid, Donnatal #2, Donphen
How Atropine, Hyoscyamine, Scopolamine, Phenobarbital interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Atropine, Hyoscyamine, Scopolamine, Phenobarbital interactionAtropine, PhenobarbitalAnthrocol
How Atropine, Phenobarbital interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Atropine, Phenobarbital interactionAtropine, MeperidineAtropine, Meperidine
How Atropine, Meperidine interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants, Serotonergic Drugs Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Atropine, Meperidine interactionAtropine, Morphine SulfateAtropine, Morphine Sulfate
How Atropine, Morphine Sulfate interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Atropine, Morphine Sulfate interactionBelladona Extract, PhenobarbitalChardonna-2
How Belladona Extract, Phenobarbital interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Belladona Extract, Phenobarbital interactionBelladonna Alkaloids, Chlorpheniramine, Phenylephrine, PhenylpropanolamineRespa ARM
How Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineSerotonergic Drugs Minor
Interaction Summary
Clinical studies regarding the effects of L-theanine on serotonin levels are conflicting.
Read the full L-theanine + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine interactionBelladonna Alkaloids, Ergotamine Tartrate, PhenobarbitalBel Tabs, Bellamine-S, Bellaphen-S, Duragal S, Phenarbal S, Spastrin
How Belladonna Alkaloids, Ergotamine Tartrate, Phenobarbital interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Belladonna Alkaloids, Ergotamine Tartrate, Phenobarbital interactionBelladonna Alkaloids, PhenobarbitalBarbidonna, Donnatal
How Belladonna Alkaloids, Phenobarbital interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Belladonna Alkaloids, Phenobarbital interactionBelladonna Extract, PhenobarbitalBelap
How Belladonna Extract, Phenobarbital interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Belladonna Extract, Phenobarbital interactionBelladonna, Caffeine, Ergotamine, PentobarbitalMicomp PB
How Belladonna, Caffeine, Ergotamine, Pentobarbital interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Belladonna, Caffeine, Ergotamine, Pentobarbital interactionBelladonna, Ergotamine Tartrate, Phenobarbital
How Belladonna, Ergotamine Tartrate, Phenobarbital interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Belladonna, Ergotamine Tartrate, Phenobarbital interactionBelladonna, Ergotamine, PhenobarbitalBellergal-S
How Belladonna, Ergotamine, Phenobarbital interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Belladonna, Ergotamine, Phenobarbital interactionBelladonna, OpiumB & O Supprettes
How Belladonna, Opium interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Belladonna, Opium interactionBelladonna, PhenobarbitalBellophen, Susano
How Belladonna, Phenobarbital interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Belladonna, Phenobarbital interactionBellafoline, Caffeine, Ergotamine Tartrate, PentobarbitalCafergot PB
How Bellafoline, Caffeine, Ergotamine Tartrate, Pentobarbital interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Bellafoline, Caffeine, Ergotamine Tartrate, Pentobarbital interactionBellafoline, PhenobarbitalBelladenal, Belladenal-S
How Bellafoline, Phenobarbital interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Bellafoline, Phenobarbital interactionBenactyzine, MeprobamateDeprol
How Benactyzine, Meprobamate interacts with L-Theanine — through 1 ingredient. Tap an ingredient for the detail:
L-theanineCns Depressants Minor
Interaction Summary
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants.
Read the full L-theanine + Benactyzine, Meprobamate interactionEach ingredient & the kinds of drugs it affects
For each ingredient in L-Theanine with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.
L-Theanine
Antihypertensive Drugs
Theanine might lower blood pressure, potentiating the effects of antihypertensive drugs.
Animal research shows that theanine can lower blood pressure in spontaneously hypertensive animals. Theoretically, concomitant use of theanine and antihypertensive drugs might potentiate the antihypertensive activity.
Cns Depressants
Theoretically, theanine might have additive sedative effects when used in conjunction with CNS depressants. However, it is unclear if this concern is clinically relevant.
Theoretically, theanine may compete with glutamate and/or increase plasma gamma-aminobutyric acid (GABA) levels, which could cause CNS depression. In one clinical study, some subjects taking oral theanine reported drowsiness.
Serotonergic Drugs
Clinical studies regarding the effects of L-theanine on serotonin levels are conflicting. Some studies suggest it can increase serotonin levels in the brain while others report that it may decrease them. Nevertheless, there have been no reports of l-theanine being a causative agent in serotonergic-related side effects or serotonin syndrome.
Brand information
Manufacturer and brand details for L-Theanine, from the product label.
BulkSupplements.com
See all BulkSupplements.com products- Name
- BulkSupplements.com
- Street Address
- 7511 Eastgate Rd
- City
- Henderson
- State
- NV
- ZipCode
- 89011
- Web Address
- BulkSupplements.com
L-Theanine by BulkSupplements.com: Common Questions
Does L-Theanine by BulkSupplements.com interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
What's L-theanine actually for?
Can I take this if I'm pregnant or nursing?
What side effects should I expect?
Is it safe to take with my blood pressure medicine?
Does this product have fillers or anything else in it?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if L-Theanine is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.
The Full Monographs Behind L-Theanine’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
L-Theanine's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.
- NIH Dietary Supplement Label Database (DSLD) — The official product label on file for this supplement.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference behind the ingredient interaction data.
Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.
The 6 references behind this product’s interaction data
Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.
Theanine 6 references
- Yokogoshi H, Kobayashi M. Hypotensive effect of gamma-glutamylethylamide in spontaneously hypertensive rats. Life Sci 1998;62:1065-8.
- Haskell, C. F., Kennedy, D. O., Milne, A. L., Wesnes, K. A., and Scholey, A. B. The effects of L-theanine, caffeine and their combination on cognition and mood. Biol.Psychol. 2008;77(2):113-122. PubMed
- Yokogoshi, H., Kato, Y., Sagesaka, Y. M., Takihara-Matsuura, T., Kakuda, T., and Takeuchi, N. Reduction effect of theanine on blood pressure and brain 5-hydroxyindoles in spontaneously hypertensive rats. Biosci.Biotechnol.Biochem. 1995;59(4):615-618. PubMed
- Lyon MR, Kapoor MP, Juneja LR. The effects of L-theanine (Suntheanine®) on objective sleep quality in boys with attention deficit hyperactivity disorder (ADHD): a randomized, double-blind, placebo-controlled clinical trial. Altern Med Rev. 2011;16(4):348-
- Hidese S, Ota M, Wakabayashi C, et al. Effects of chronic l-theanine administration in patients with major depressive disorder: an open-label study. Acta Neuropsychiatr 2017;29(2):72-9.
- Tsuchiya T, Honda H, Oikawa M, et al. Oral administration of the amino acids cystine and theanine attenuates the adverse events of S-1 adjuvant chemotherapy in gastrointestinal cancer patients. Int J Clin Oncol 2016;21(6):1085-90. PubMed
Parts of this content are provided by the Therapeutic Research Center, LLC.
DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
© 2021 Therapeutic Research Center, LLC