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Dietary supplement

Ultra Theanine Ingredients & Drug Interactions

by Vera's Formulations

Ultra Theanine label
See full label image
Capsule Category: Non-nutrient/non-botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 30, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Ultra 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

The interaction bottom line Most serious interaction: Moderate

Ultra Theanine is a dietary supplement by Vera's Formulations 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.

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Check Your Meds Against Ultra Theanine by Vera's Formulations

Ask about any prescription or over-the-counter medication and we check it for interactions with Ultra Theanine by Vera's Formulations — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Ultra Theanine by Vera's Formulations

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.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Sep 24, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

Ultra Theanine is a single-ingredient supplement containing L-theanine, an amino acid naturally found in green tea. L-theanine is thought to promote relaxation and support mental focus without causing drowsiness on its own, though the research on specific benefits is still developing.

Does it work?

Moderate evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Moderate

Some clinical evidence supports this product's ingredients for its stated purpose, but it isn't conclusive.

Why this rating?
  • The label markets this product for: Supports cognitive functions and mood balance.
  • We looked for evidence on: Cognitive function, Stress, Generalized anxiety disorder (GAD), Depression, Insomnia, Mental clarity — and 1 related terms.
  • The strongest evidence on file: Theanine is rated "Possibly Effective" for Cognitive function (Natural Medicines).
  • Also on file: Theanine is rated "Insufficient Reliable Evidence To Rate" for Generalized anxiety disorder (GAD), Depression, Insomnia, Stress.

L-theanine has possibly effective evidence for supporting cognitive function. For age-related cognitive decline, Alzheimer disease, generalized anxiety disorder, obsessive-compulsive disorder, and cancer prevention or treatment, the evidence we hold is insufficient to rate whether it works.

If you're considering this for a specific health goal, talk with your doctor or pharmacist about what the current research shows for your situation.

The evidence, ingredient by ingredient Theanine

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

L-theanine is generally well tolerated in healthy adults for short-term use, but long-term safety hasn't been well studied. Some people report headaches, drowsiness, increased sleep length, or more vivid dreams after taking it.

There is not enough safety data during pregnancy and breastfeeding. The facts advise against using this supplement if you're pregnant or nursing — talk with your doctor or pharmacist for personalized guidance, especially if you're considering it for a specific reason.

Side effects, ingredient by ingredient Theanine

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Theanine.
  • The most serious interaction on file is rated Moderate.
  • For scale: 565 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Before taking Ultra Theanine, double-check with your doctor or pharmacist if you take blood pressure medications (Moderate interaction risk), sedatives or sleep aids, or antidepressants and other serotonin-affecting drugs (Minor interaction risk for both). No interactions are documented for other drug types we checked.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

Ultra Theanine may appeal to you if you're looking to support focus and relaxation and don't take blood pressure or psychiatric medications. If you're on antihypertensive drugs, sedatives, or antidepressants, you'll want to check with your doctor or pharmacist before adding this product.

Pregnant or breastfeeding? The safety data isn't there yet, so run it past your provider first.

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 Aug 23, 2021.

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

At a glance

General information

Key facts about Ultra Theanine, straight from the product label.

Brand Vera's Formulations
Barcode (UPC) 9319091412076
Net contents 30 Capsule(s)
Market status On market
Date entered into DSLD Aug 23, 2021
DSLD ID 256595
Product type Non-nutrient/non-botanical
Supplement form Capsule
Dietary claims / uses All Other
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years)
From the label
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 Ultra Theanine by Vera's Formulations, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1 Capsule(s)
Maximum serving Sizes:
1 Capsule(s)
Servings per container
30
UPC/BARCODE
9319091412076
IngredientAmount% DV
L-Theanine200 mg--

Tap any ingredient to jump to its full detail below.

Label statements
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.
Precautions

For Practitioner Dispensing Only

Warning: Vitamin supplements should not replace a balanced diet. Do not use if tamper evidence seal is broken. Bottle sealed under cap for your protection.

Keep out of reach of children.

Suggested/Recommended/Usage/Directions

Adult Dose: Take 1 capsule per day, or as recommended by your healthcare practitioner.

Storage

Store below 30 degrees C in a cool, dry place away from direct sunlight.

Formulation

Indications: Supports cognitive functions and mood balance.

Healthy stress response

Vegan friendly.

General Statements

Proudly Australian Owned Tomorrow's solutions for today

B

FDA Statement of Identity

Nutritional Supplement

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Ultra Theanine by Vera's Formulations label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Ultra Theanine label

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)
What’s inside

The Ingredients in Ultra Theanine by Vera's Formulations

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size1 Capsule(s) Dosage formCapsule Servings per container30 Amounts shown are per serving.

L-Theanine

Interacts with
565 drugs
200 mg per serving

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 & interactions
Interaction report

Ultra Theanine by Vera's Formulations Drug Interactions

Want to check YOUR meds against Ultra 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 checker
565Drugs
172 Moderate 393 Minor

Ingredients driving the most interactions

L-Theanine 565

Individual Drug Interactions

The ingredients in Ultra Theanine interact with 565 drugs. Click any drug to see the details.

1 of the 1 ingredient in Ultra Theanine interact with drugs. Each result below shows which ingredient is responsible. L-Theanine

Each ingredient & the kinds of drugs it affects

For each ingredient in Ultra 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-Theanine3 drug types · 565 drugs

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.

Likelihood Possible Evidence D
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.

Likelihood Unlikely Evidence D
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.

Likelihood Unlikely Evidence C
L-Theanine full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Ultra Theanine, from the product label.

Vera's Formulations

See all Vera's Formulations products
Name
Dr Vera's Formulations
Street Address
39 Freestone Rd
City
Warwick
State
QLD
ZipCode
4370
Phone Number
(07) 3868 0622
Web Address
[email protected]
Pharmacist Counseling Corner

Ultra Theanine by Vera's Formulations: Common Questions

Does Ultra Theanine by Vera's Formulations interact with any medications?
Yes. Based on its ingredients, Ultra Theanine has a known interaction with 565 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Ultra Theanine contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
What does L-theanine do?
L-theanine is an amino acid found in green tea that's thought to promote relaxation and support mental focus. It's possibly effective for cognitive function, though more evidence is needed for other uses like anxiety or age-related memory decline.
Can I take this if I'm on blood pressure medication?
That's a conversation to have with your doctor or pharmacist. L-theanine may lower blood pressure, and combining it with antihypertensive drugs could drop your pressure too far. Your provider can tell you if it's safe for your specific situation.
Is L-theanine safe for long-term use?
It's generally well tolerated for short-term use in healthy adults, but long-term safety hasn't been well studied. If you're thinking of taking it regularly, check in with your doctor or pharmacist about what's known and what isn't.
Can I take this while pregnant or breastfeeding?
There isn't enough safety data during pregnancy or breastfeeding, so the guidance is to avoid it in both situations. Talk with your doctor or pharmacist about your options and whether L-theanine might be right for you.
What side effects has theanine caused?
Some people report headaches, drowsiness, longer sleep, or more vivid dreams. One pediatric case of facial tics was reported, but it resolved when the product was stopped and wasn't thought to be related to the theanine itself.
Will this make me drowsy?
L-theanine is designed to promote relaxation without causing drowsiness on its own, though some users report increased sleepiness or sleep duration. If you take sedatives or sleep aids, you may experience extra drowsiness — check with your doctor or pharmacist first.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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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.

Ultra Theanine label
Go deeper

The Full Monographs Behind Ultra Theanine’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Theanine

Interacts with 565 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 drowsiness. Early research suggests it may...

Read the full Theanine monograph →
Sources

Sources & How We Checked

Ultra 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.

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
  1. Yokogoshi H, Kobayashi M. Hypotensive effect of gamma-glutamylethylamide in spontaneously hypertensive rats. Life Sci 1998;62:1065-8.
  2. 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
  3. 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
  4. 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-
  5. 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.
  6. 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

See these in context on the Theanine monograph →

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

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