Interactions on record — worth a quick check against your medications. Based on 1 of 2 ingredients. Check your meds →
Dietary supplement

Reishi 4X Ingredients & Drug Interactions

by Pure Essence MyPure

Reishi 4X 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 Reishi 4X 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

Reishi 4X is a dietary supplement by Pure Essence MyPure with 2 active ingredients. Its ingredients are commonly taken for immune support, fatigue and general well-being, stress and sleep.Based on those ingredients, 375 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are organic Royal Red Reishi Mushroom extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Reishi 4X by Pure Essence MyPure

Ask about any prescription or over-the-counter medication and we check it for interactions with Reishi 4X by Pure Essence MyPure — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Reishi 4X by Pure Essence MyPure

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 10, 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 2 of its 2 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

Reishi 4X has two active ingredients, both organic Royal Red Reishi Mushroom extract. Reishi is a fungus used in traditional medicine; this product concentrates it to deliver a higher dose per capsule.

The only inactive ingredient is HPMC, a capsule material.

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 Reishi Mushroom's own graded uses on its monograph.

Why this rating?
  • The label markets this product for: Supports healthy stress response & immune response.
  • We looked for evidence on: Stress, Psychological well-being, Insomnia, Chronic fatigue syndrome (CFS), Cancer-related fatigue, Fibromyalgia — and 4 related terms.
  • The closest evidence on file: Reishi Mushroom is rated "Insufficient Reliable Evidence To Rate" for Bronchitis (Natural Medicines).
  • Also on file: Reishi Mushroom is rated "Insufficient Reliable Evidence To Rate" for Asthma, Chronic fatigue syndrome (CFS), Cancer-related fatigue, Fibromyalgia, and more.

The evidence for reishi mushroom's effectiveness is limited and mixed. For high cholesterol (hyperlipidemia), the data suggests it's probably not effective.

For altitude sickness, Alzheimer disease, and athletic performance, there simply isn't enough reliable evidence yet to know whether it works.

The evidence, ingredient by ingredient Reishi Mushroom

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.

Reishi mushroom is generally well tolerated in the short term, but long-term safety hasn't been well studied. The most common side effects are dizziness, dry mouth, itching, nausea, rash, and stomach upset.

Respiratory allergy to reishi spores can occur, and some people report sore throat or runny nose. Rare effects include insomnia and headache.

There isn't enough safety data to know whether reishi is safe in pregnancy or while breastfeeding. If you're pregnant or nursing, talk with your doctor or pharmacist before taking this product.

Side effects, ingredient by ingredient Reishi Mushroom

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 — Reishi Mushroom.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; diabetes medications.
  • For scale: 375 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 Reishi 4X, double-check with your doctor or pharmacist if you're on blood pressure medication, blood thinners (anticoagulants or antiplatelets), or diabetes medication. Reishi mushroom can theoretically add to the effects of all three, which might increase the risk of low blood pressure, bleeding, or low blood sugar.

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.

Reishi 4X may appeal to someone looking for traditional mushroom support, but the evidence for most uses is thin. If you take blood pressure medication, blood thinners, or diabetes medication, you should check with your doctor or pharmacist before starting — reishi can interact with all three types.

For general use, expect it to be well tolerated short-term, but know that long-term effects are unclear.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jul 23, 2020.

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 Reishi 4X, straight from the product label.

Brand Pure Essence MyPure
Barcode (UPC) 659670920011
Net contents 30 Vegi-Cap(s)
Market status On market
Date entered into DSLD Jul 23, 2020
DSLD ID 231065
Product type Non-nutrient/non-botanical
Supplement form Capsule
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years), 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 Reishi 4X by Pure Essence MyPure, 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)
UPC/BARCODE
659670920011
IngredientAmount% DV
organic Royal Red Reishi Mushroom extract250 mg--
organic Royal Red Reishi Mushroom extract250 mg--

Other ingredients: HPMC

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

Non GMO

Vegan

Gluten Free

Organic ingredients

100% Purity & Potency Guarantee

Supports healthy stress response & immune response

Over 4 times stronger

Does not contain: Wheat, milk, tree nuts, peanuts, soy, eggs, fish, shellfish

General Statements

90 day Money back guarantee

1 month supply

Please recycle

FDA Statement of Identity

Dietary Supplement

Formula

100% certified organic whole mushroom fruiting body extract This product provides at least 30% Beta-(1,3)(1,6) D-Glucans MyPure Reishi 4X combines 1:1 and 8:1 extracts of certified organic reishi fruiting bodies to deliver the most potent reishi nutrition you'll find. Every batch is lab tested for cleanliness, purity and potency. Reishi supports: Healthy stress response Healthy immune function Concentration & focus

This product provides at least 30% Beta-(1,3)(1,6) D-Glucans

Suggested/Recommended/Usage/Directions

Suggested Use: One capsule daily.

Storage

Storage: Keep closed in a cool, dry place.

Precautions

Caution: Keep all supplements out of children's reach.

FDA Disclaimer Statement

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

Seals/Symbols

Made in USA

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

See for yourself

Reishi 4X by Pure Essence MyPure label

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

Reishi 4X 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 Reishi 4X by Pure Essence MyPure

These are the 2 active ingredients this product is made of. Select any to open its full monograph.

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

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Organic Royal Red Reishi Mushroom extract

Interacts with
375 drugs
250 mg per serving

Reishi is a traditional Asian mushroom widely used to support the immune system and overall wellness. Human evidence for most of its claimed benefits...

Organic Royal Red Reishi Mushroom extract monograph & interactions

Organic Royal Red Reishi Mushroom extract

250 mg per serving

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

Interaction report

Reishi 4X by Pure Essence MyPure Drug Interactions

Want to check YOUR meds against Reishi 4X?

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
375Drugs
375 Moderate

Ingredients driving the most interactions

organic Royal Red Reishi Mushroom extract 375

Individual Drug Interactions

The ingredients in Reishi 4X interact with 375 drugs. Click any drug to see the details.

1 of the 2 ingredients in Reishi 4X interact with drugs. Each result below shows which ingredient is responsible. organic Royal Red Reishi Mushroom extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Reishi 4X 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.

organic Royal Red Reishi Mushroom extract3 drug types · 375 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, high doses of reishi mushroom might increase the risk of bleeding.
A dose of 1.5 grams daily of reishi mushroom does not seem to decrease platelet aggregation, but a higher dose of 3 grams daily does.

Likelihood Possible Evidence D
Antidiabetes Drugs

Theoretically, reishi mushroom might have additive effects with antidiabetes drugs.
Animal research suggests that reishi mushroom decreases blood sugar. However, in patients with type 2 diabetes, taking reishi mushroom does not reduce fasting glucose levels, and its effects on glycated hemoglobin are inconsistent.

Likelihood Possible Evidence D
Antihypertensive Drugs

Theoretically, concurrent use of reishi mushroom with antihypertensive drugs might increase the risk of hypotension.
Reishi mushroom has shown hypotensive activity in animal research. Clinical evidence suggests that reishi mushroom reduces blood pressure in some, but not all, patients with hypertension.

Likelihood Possible Evidence D
organic Royal Red Reishi Mushroom extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Reishi 4X, from the product label.

Pure Essence MyPure

See all Pure Essence MyPure products
Name
Pure Essence Laboratories, Inc.
Street Address
P.O. Box 95397
City
Las Vegas
State
NV
ZipCode
89193
Web Address
www.pureessencelabs.com
Pharmacist Counseling Corner

Reishi 4X by Pure Essence MyPure: Common Questions

Does Reishi 4X by Pure Essence MyPure interact with any medications?
Yes. Based on its ingredients, Reishi 4X has a known interaction with 375 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Reishi 4X contains 2 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is 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 exactly is in one capsule of Reishi 4X?
Two servings of organic Royal Red Reishi Mushroom extract. It's a concentrated fungal extract designed to give you a stronger dose per pill.
Can I take Reishi 4X if I'm pregnant or breastfeeding?
There isn't enough safety data to know either way. Talk with your doctor or pharmacist before using it during pregnancy or while nursing — they can help you weigh the risks and benefits for your specific situation.
What side effects might I notice?
Most common are dizziness, dry mouth, itching, nausea, rash, and stomach upset. Rarely, some people report insomnia or headache. Respiratory allergy to reishi spores can happen too, causing sore throat or runny nose.
Does reishi mushroom actually work for anything?
The evidence is mixed. For high cholesterol, it's probably not effective. For altitude sickness, Alzheimer disease, and athletic performance, we don't have enough reliable data yet to say whether it works.
Is Reishi 4X safe to take long-term?
Short-term use is generally well tolerated, but long-term safety hasn't been well studied. If you're planning to take it for months or longer, mention that to your doctor or pharmacist.

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.

Reishi 4X label
Go deeper

The Full Monographs Behind Reishi 4X’s Ingredients

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

Herb & supplement monograph

Reishi Mushroom

Interacts with 375 drugs

Reishi is a traditional Asian mushroom widely used to support the immune system and overall wellness. Human evidence for most of its claimed benefits is limited or low-quality, so it should...

Read the full Reishi Mushroom monograph →
Sources

Sources & How We Checked

Reishi 4X'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 17 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.

Reishi Mushroom 17 references
  1. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  2. Tao J, Feng KY. Experimental and clinical studies on inhibitory effect of ganoderma lucidum on platelet aggregation. J Tongji Med Univ 1990;10:240-3. PubMed
  3. Singh AB, Gupta SK, Pereira BM, Prakash D. Sensitization to Ganoderma lucidum in patients with respiratory allergy in India. Clin Exp Allergy 1995;25:440-7.
  4. Lee SY, Rhee HM. Cardiovascular effects of mycelium extract of Ganoderma lucidum: inhibition of sympathetic outflow as a mechanism of its hypotensive action. Chem Pharm Bull (Tokyo) 1990;38:1359-64. PubMed
  5. Kwok Y, Ng KFJ, Li, CCF, et al. A prospective, randomized, double-blind, placebo-controlled study of the platelet and global hemostatic effects of Ganoderma lucidum (Ling-Zhi) in healthy volunteers. Anesth Analg 2005;101:423-6. PubMed
  6. Wanmuang, H., Leopairut, J., Kositchaiwat, C., Wananukul, W., and Bunyaratvej, S. Fatal fulminant hepatitis associated with Ganoderma lucidum (Lingzhi) mushroom powder. J Med Assoc Thai. 2007;90(1):179-181.
  7. Seto, S. W., Lam, T. Y., Tam, H. L., Au, A. L., Chan, S. W., Wu, J. H., Yu, P. H., Leung, G. P., Ngai, S. M., Yeung, J. H., Leung, P. S., Lee, S. M., and Kwan, Y. W. Novel hypoglycemic effects of Ganoderma lucidum water-extract in obese/diabetic (+db/+db
  8. Chu, T. T., Benzie, I. F., Lam, C. W., Fok, B. S., Lee, K. K., and Tomlinson, B. Study of potential cardioprotective effects of Ganoderma lucidum (Lingzhi): results of a controlled human intervention trial. Br.J.Nutr. 2012;107(7):1017-1027.
  9. Jin, X., Ruiz, Beguerie J., Sze, D. M., and Chan, G. C. Ganoderma lucidum (Reishi mushroom) for cancer treatment. Cochrane.Database.Syst.Rev. 2012;6:CD007731.
  10. Kabir, Y., Kimura, S., and Tamura, T. Dietary effect of Ganoderma lucidum mushroom on blood pressure and lipid levels in spontaneously hypertensive rats (SHR). J Nutr Sci Vitaminol.(Tokyo) 1988;34(4):433-438. PubMed
  11. Kanmatsuse, K., Kajiwara, N., Hayashi, K., Shimogaichi, S., Fukinbara, I., Ishikawa, H., and Tamura, T. [Studies on Ganoderma lucidum. I. Efficacy against hypertension and side effects]. Yakugaku Zasshi 1985;105(10):942-947. PubMed
  12. Gao, Y., Lan, J., Dai, X., Ye, J., and Zhou, S. A Phase I/II Study of Ling Zhi Mushroom Ganoderma lucidum(W.Curt: Fr.) Lloyd (Aphyllophoromycetideae) Extract in Patients with Type II Diabetes Mellitus. International Journal of Medicinal Mushrooms 2004;6. DOI
  13. Jin H, Zhang G, Cao X, and et al. Treatment of hypertension by linzhi combined with hypotensor and its effects on arterial, arteriolar and capillary pressure and microcirculation. In: Niimi H, Xiu RJ, Sawada T, and et al. Microcirculatory Approach to Asi
  14. Klupp NL, Chang D, Hawke F, Kiat H, Cao H, Grant SJ, Bensoussan A. Ganoderma lucidum mushroom for the treatment of cardiovascular risk factors. Cochrane Database Syst Rev. 2015 Feb 17;2:CD007259. PubMed
  15. Zhao H, Zhang Q, Zhao L, Huang X, Wang J, Kang X. Spore Powder of Ganoderma lucidum Improves Cancer-Related Fatigue in Breast Cancer Patients Undergoing Endocrine Therapy: A Pilot Clinical Trial. Evid Based Complement Alternat Med. 2012;2012:809614.
  16. Pazzi F, Adsuar JC, Domínguez-Muñoz FJ, García-Gordillo MA, Gusi N, Collado-Mateo D. Ganoderma lucidum effects on mood and health-related quality of life in women with fibromyalgia. Healthcare (Basel) 2020;8(4):520. PubMed
  17. Kogure T, Koiwai A, Fukushi D, et al. Hypereosinophilia with hepatic nodule formation caused by Ganoderma lucidum. Intern Med 2021;60(24):3897-3903.

See these in context on the Reishi Mushroom 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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