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Dietary supplement

Sun Theanine 200 mg Ingredients & Drug Interactions

by Paradise

Sun Theanine 200 mg label
See full label image
Capsule Category: Non-nutrient/non-botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Sun Theanine 200 mg 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

Sun Theanine 200 mg is a dietary supplement by Paradise 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 Pure Sun 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 Sun Theanine 200 mg by Paradise

Ask about any prescription or over-the-counter medication and we check it for interactions with Sun Theanine 200 mg by Paradise — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Sun Theanine 200 mg by Paradise

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 Jul 11, 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.

Sun Theanine contains one active ingredient: pure theanine at 200 mg per capsule. Theanine is an amino acid naturally found in green tea that's believed to promote calm focus without drowsiness.

The capsule itself is vegetarian.

Does it work?

Not established
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
Not established

The graded evidence we hold for these ingredients covers different conditions than the ones this product is marketed for, so there's no established rating for its stated use — see Theanine's own graded uses on its monograph.

Why this rating?
  • The label markets this product for: reduce stress and promote relaxation and calm.
  • We looked for evidence on: Stress, Generalized anxiety disorder (GAD), Insomnia, Depression, Anxiety, Cortisol reduction — and 2 related terms.
  • The closest evidence on file: Theanine is rated "Insufficient Reliable Evidence To Rate" for Generalized anxiety disorder (GAD) (Natural Medicines).
  • Also on file: Theanine is rated "Insufficient Reliable Evidence To Rate" for Depression, Insomnia, Stress.

The evidence supports theanine for cognitive function, where it's rated possibly effective — meaning there's some research backing, but it's not definitive. For age-related cognitive decline, Alzheimer's disease, generalized anxiety, OCD, and cancer, the evidence we hold isn't strong enough to rate it one way or another.

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.

Theanine is generally well tolerated in healthy adults when used short-term, but we don't have solid data on how safe it is for long-term use. The most common side effects reported in trials are headaches, drowsiness, longer sleep, and increased dreaming.

There isn't enough safety data for pregnancy or breastfeeding, so it's best to avoid it during those times. One case report described a child who developed a facial tic within days of taking a higher dose of theanine; the tic stopped when they quit.

However, since that child had a history of tics, the link to theanine wasn't considered firm.

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.

Check your exact medications before adding this product if you take blood pressure medication (antihypertensives) — theanine may lower your pressure further. Also double-check if you use CNS depressants like sedatives or certain pain relievers, or any serotonergic drugs like some antidepressants, though the risk with those is lower.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no established evidence rating for its marketed use. Moderate medication interactions have been identified, and safety information is well characterized.

Sun Theanine is worth considering if you're interested in cognitive support and don't take blood pressure medication or CNS depressants. If you're on any prescription — especially for blood pressure or mood — or if you're pregnant or breastfeeding, talk with your pharmacist before starting.

We don't have long-term safety data, so short-term use is what we know most about.

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 24, 2023.

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 Sun Theanine 200 mg, straight from the product label.

Brand Paradise
Barcode (UPC) 601944777586
Net contents 30 Vegetarian Capsule(s)
Market status On market
Date entered into DSLD Aug 24, 2023
DSLD ID 289053
Product type Non-nutrient/non-botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years), No Allergies, Gluten Free
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 Sun Theanine 200 mg by Paradise, 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 Vegetarian Capsule(s)
Maximum serving Sizes:
1 Vegetarian Capsule(s)
Servings per container
30
UPC/BARCODE
601944777586
IngredientAmount% DV
Pure Sun Theanine200 mg--

Other ingredients: Vegetarian Capsule

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.
Formulation

Quality - purity - potency We are dedicated to sourcing premium ultra pure ingredients that meet the highest standards of excellence.

Vegan

Made with Non-GMO ingredients Gluten free

Contains no common allergens. Made without fillers.

Manufactured in the USA. GMP Quality Assured & FDA Registered.

We never add unnecessary fillers, binders, preservatives or glow agents to our encapsulation process.

Formula

What is Sun Theanine SunTheanine is a patented pure form of L-theanine, clinically researched and backed by more than 40 U.S. and international patents. It has been shown to reduce stress and stress associated imbalances and promote relaxation without inducing drowsiness.

Calm + relax + anti-stress nutrient

Sun Theanine Ultimate 200 mg potency

Storage

Warning: Keep in a cool dry place, out of the reach of children.

Precautions

Warning: Keep in a cool dry place, out of the reach of children.

If pregnant, nursing, or using any prescription medication consult your health care professional before using this product.

FDA Disclaimer Statement

These statements have not been evaluated by the Food & Drug administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Seals/Symbols

Enhancing Nature's Miracles Since 1994

FDA Statement of Identity

Dietary Supplement

Suggested/Recommended/Usage/Directions

Suggested use: Take 1 vegetarian capsule 1-2 times daily or as directed by a qualified health care professional.

General Statements

Paradise products have won over a decade of Best of Supplements Awards.

Brand IP Statement(s)

Paradise Premium Quality For Over 25 Years

SunTheanine is a patented pure form of L-theanine, clinically researched and backed by more than 40 U.S. and international patents.

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

See for yourself

Sun Theanine 200 mg by Paradise label

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

Sun Theanine 200 mg 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 Sun Theanine 200 mg by Paradise

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

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

Pure Sun Theanine

Interacts with
565 drugs
200 mg per serving Form: L-Theanine

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...

Pure Sun Theanine monograph & interactions

Other (inactive) ingredients: Vegetarian Capsule. These complete the product’s ingredient list but are not active constituents.

Interaction report

Sun Theanine 200 mg by Paradise Drug Interactions

Want to check YOUR meds against Sun Theanine 200 mg?

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

Pure Sun Theanine 565

Individual Drug Interactions

The ingredients in Sun Theanine 200 mg interact with 565 drugs. Click any drug to see the details.

1 of the 1 ingredient in Sun Theanine 200 mg interact with drugs. Each result below shows which ingredient is responsible. Pure Sun Theanine

Each ingredient & the kinds of drugs it affects

For each ingredient in Sun Theanine 200 mg 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.

Pure Sun 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
Pure Sun Theanine full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Sun Theanine 200 mg, from the product label.

Paradise

See all Paradise products
Name
Paradise Herbs & Essentials, Inc.
Street Address
19051 Goldenwest St. #106-304
City
Huntington Beach
State
CA
ZipCode
92648
Web Address
www.paradiseherbs.com
Pharmacist Counseling Corner

Sun Theanine 200 mg by Paradise: Common Questions

Does Sun Theanine 200 mg by Paradise interact with any medications?
Yes. Based on its ingredients, Sun Theanine 200 mg 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?
Sun Theanine 200 mg 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.
Is Sun Theanine safe to take while I'm pregnant or breastfeeding?
There isn't enough safety data to say either way, so it's best to avoid it during pregnancy and while breastfeeding. Talk with your doctor or pharmacist for personalized advice if you're considering it.
What are the most common side effects?
Headaches are the main one. Some people also report drowsiness, sleeping longer than usual, or more vivid dreams after taking theanine.
Does theanine actually improve memory or focus?
There's evidence suggesting it may help with cognitive function — that's why we rate it as possibly effective — but the research isn't rock solid. Evidence for other conditions like age-related memory loss or Alzheimer's isn't established yet in the data we have.
Can I take this long-term?
We have good safety data for short-term use in healthy adults, but long-term safety hasn't been well studied. Talk with your pharmacist about how long you plan to use it.
Will this make me sleepy?
Some people report drowsiness and longer sleep, but it's not guaranteed. Since theanine is meant to promote calm focus, individual responses vary.

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

Not sure if Sun Theanine 200 mg is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

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.

Sun Theanine 200 mg label
Go deeper

The Full Monographs Behind Sun Theanine 200 mg’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

Sun Theanine 200 mg'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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