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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 9, 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.

Jump to a section

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.

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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.

Paradise Sun Theanine contains one active ingredient: Pure Sun Theanine at 200 mg per capsule. Theanine is an amino acid found naturally in tea that's studied for its effects on focus, relaxation, and brain function.

The capsule also contains cellulose as an inactive ingredient.

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.
  • We looked for evidence on: Stress, Generalized anxiety disorder (GAD), Insomnia, Depression, Anxiety, Sleep quality.
  • The closest evidence on file: Theanine is rated "Insufficient Reliable Evidence To Rate" for Anxiety (Natural Medicines).
  • Also on file: Theanine is rated "Insufficient Reliable Evidence To Rate" for Depression, Generalized anxiety disorder (GAD), Insomnia, Stress.

The evidence for theanine in cognitive function is limited. It's rated possibly effective for cognitive function, meaning there's some promise but it's not a slam-dunk.

For age-related cognitive decline, Alzheimer's disease, generalized anxiety, OCD, and cancer, we don't have enough reliable evidence to say whether theanine works. If you're considering this for one of those uses, talk with your pharmacist or doctor about what the current science actually supports.

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 for short-term use, but long-term safety hasn't been well studied, so we don't know much about taking it for months or years. The most common side effects reported are headaches, drowsiness, longer sleep, and vivid dreams.

One pediatric case of facial tics appeared after starting theanine, but the tics stopped when it was discontinued — though the child had a history of tics, so the link wasn't clear. There isn't enough safety data to support use during pregnancy or while breastfeeding.

If you're pregnant, planning pregnancy, or nursing, talk with your doctor or pharmacist before starting this product.

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 you start, double-check this product if you take blood pressure medication — theanine could lower your pressure further. Also check if you're on sedating drugs (like sleep aids or anxiety medications) or serotonergic antidepressants, though these interactions are less established.

Use the medication checker on this page with your exact drug names.

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 may help with focus and calm, though the evidence for cognitive benefits is modest. If you take blood pressure medication, sedating drugs, or serotonergic antidepressants, check with your pharmacist first — theanine could intensify some of these effects.

It's generally well tolerated for short-term use in otherwise healthy people.

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 Sep 25, 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

At a glance

General information

Key facts about Sun Theanine 200 mg, straight from the product label.

Brand Paradise
Barcode (UPC) 601944778941
Net contents 90 Vegetable Capsule(s)
Market status On market
Date entered into DSLD Sep 25, 2024
DSLD ID 317181
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, Dairy 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
90
UPC/BARCODE
601944778941
IngredientAmount% DV
Pure Sun Theanine200 mg--

Other ingredients: Cellulose

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

Vegan

Made with Non-GMO Ingredients Gluten Free

Contains no common allergens. Made without fillers.

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

Calm + Relax + Anti-Stress Nutrient

General Statements

Paradise products have won over a decade of Best of Supplements Awards. We are dedicated to sourcing premium ingredients that meet the highest standards of excellence.

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 including drowsiness. Calm + Relax + Anti-Stress Nutrient

Sun Theanine Ultimate 200mg Potency

Brand IP Statement(s)

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

Enhancing Nature's Miracles since 1994 Paradise Premium Quality for over 25 years

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.

Storage

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

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.

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.

Seals/Symbols

Vegan

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 container90 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: Cellulose. 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.
Can I take Sun Theanine while I'm pregnant or breastfeeding?
There isn't enough safety data to support use during pregnancy or while breastfeeding. Talk with your doctor or pharmacist before using it if you're pregnant, planning pregnancy, or nursing — they can give you personalized advice.
What are the most common side effects?
Headaches are the main one reported. Some people also experience drowsiness, longer sleep, or vivid dreams. These effects tend to be mild, and theanine is generally well tolerated in healthy adults.
Does Sun Theanine actually improve memory or focus?
It's rated possibly effective for cognitive function, meaning there's some evidence it might help, but it's not definitive. For memory loss related to aging or Alzheimer's, we don't have enough reliable evidence to say whether it works.
Is this safe to take long-term?
It's well tolerated for short-term use in healthy adults, but long-term safety hasn't been well studied. If you're thinking about taking it for months or years, ask your pharmacist what we know and don't know yet.
Can theanine interact with my blood pressure medicine?
Yes — theanine may lower blood pressure on its own, so it could make your blood pressure medication work even stronger and potentially drop your pressure too far. If you take a blood pressure drug, check with your pharmacist before starting this.

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

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

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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.

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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