Maitake and Shiitake Ingredients & Drug Interactions
by Hawaii Pharm
What is this page for?
First and foremost: checking Maitake and Shiitake 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
Maitake and Shiitake is a dietary supplement by Hawaii Pharm with 2 active ingredients. Its ingredients are commonly taken for immune support, blood sugar support in diabetes, high blood pressure.Based on those ingredients, 557 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Shiitake Mushroom Extract, Dry, Maitake Mushroom Extract, Dry. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Maitake and Shiitake by Hawaii Pharm
Ask about any prescription or over-the-counter medication and we check it for interactions with Maitake and Shiitake by Hawaii Pharm — 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 Maitake and Shiitake by Hawaii Pharm
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
Low disclosure
This product contains 2 active ingredients: maitake mushroom extract and shiitake mushroom extract, both in dry form. These are components of a proprietary extract blend and come as a liquid supplement.
The inactive ingredients are alcohol, water, and glycerin.
Does it work?
Couldn't assess
The evidence for what these mushroom extracts can actually do isn't established in the data we hold. Maitake has been studied for hay fever, chemotherapy-related anemia and diarrhea, laryngeal cancer, and chronic fatigue syndrome, but the evidence for all of these is insufficient to rate.
Shiitake has been studied for dental plaque, atherosclerosis, breast cancer, cancer in general, and chemotherapy-related nausea and vomiting — again, the evidence is either insufficient to rate or points to it being possibly ineffective (for dental plaque). Talk to your pharmacist or doctor about whether either extract fits what you're trying to address.
How safe is it?
Well-documented data
Both mushroom extracts are generally well tolerated as foods, but safety data for concentrated supplements hasn't been fully studied. The most common side effects when taken orally are gastrointestinal — stomach upset, diarrhea, nausea, and abdominal discomfort.
In clinical trials, a small number of participants reported these effects; one patient withdrew due to diarrhea, and one reported a rash and itching after two doses of maitake (which cleared on its own). During pregnancy, safety data isn't robust enough, so concentrated supplements should be avoided — talk with your doctor or pharmacist for personalized advice.
The same goes for breastfeeding. Raw shiitake mushrooms can cause shiitake dermatitis (a skin eruption) and, in rare cases, intestinal blockage.
If you handle raw shiitake, you may also have allergic reactions including asthma, rhinitis, or pneumonia from spore inhalation.
Meds to double-check
Moderate interaction found
Check before starting if you take warfarin or any blood thinner, antihypertensive drugs (blood pressure medications), antidiabetes drugs (blood sugar medications), immunosuppressants, or medications metabolized by the liver enzyme CYP2D6. Warfarin carries the highest concern — there's a case report of bleeding risk increase.
The others are Moderate-severity interactions. Use the medication checker on this page with your exact drug names.
The bottom line
Scorecard at a glanceFormula with limited ingredient disclosure with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.
This product is for someone interested in mushroom extract supplementation who doesn't take warfarin, blood pressure medications, diabetes medications, or drugs that suppress the immune system. If you're on any of those, or take medications metabolized by liver enzyme CYP2D6, talk to your pharmacist first.
Even if you're not on those, run your full medication list through the checker — these extracts interact with a large number of drugs.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 2 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jun 25, 2025.
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 Maitake and Shiitake, straight from the product label.
| Brand | Hawaii Pharm |
|---|---|
| Barcode (UPC) | 840253662712 |
| Net contents | 4 Fluid Ounce(s); 120 mL |
| Market status | On market |
| Date entered into DSLD | Jun 25, 2025 |
| DSLD ID | 331982 |
| Product type | Botanical |
| Supplement form | Liquid |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Gluten 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 Maitake and Shiitake by Hawaii Pharm, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Proprietary Extract Blend | 983 mg | -- |
| Maitake Mushroom Extract, Dry | 0 NP | -- |
| Shiitake Mushroom Extract, Dry | 0 NP | -- |
Other ingredients: Alcohol, Water, Glycerin
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)
Hawaii Pharm Herbal Extract Highest quality since 2008
Suggested/Recommended/Usage/Directions
Suggested use: Shake well before using. For adults add about 20-30 drops (0.7-1 ml, one full squeeze of the dropper bulb) to some juice or water, up to 4 times a day.
Precautions
Warning: We recommend to seek expert medical advice before taking.
Do not use if you are allergic to any ingredients.
Consult your physician before giving to children under 18, during pregnancy, if nursing or taking medications. Keep out of the reach of children!
Consult your physician before giving to children under 18, during pregnancy, if nursing or taking medications.
May affect the ability to drive and operate machinery. May have contraindications, can cause side effects and adverse reactions. Do not use if seal is broken or missing.
Storage
Store in a cool dry place.
Seals/Symbols
cGMP Made in compliance with cGMP 21 CFR 111 in an FDA registered and inspected facility.
USA Made in United States of America
Formulation
Made in USA, Hawaii
Organic alcohol based
Identity and purity is laboratory verified
All the raw materials are gluten-free by their nature No artificial colors, flavors, or preservatives
Formula
Organic alcohol based Only natural ingredients
FDA Statement of Identity
Herbal Supplement
General Statements
Organic raw material. Scan this QR-code to get 15% discount on your next purchase Limited time deal
Extraction rate: about 1/3-4 (up to 333 mg of dry raw material per 1 ml of extract).
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Maitake and Shiitake by Hawaii Pharm 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 Maitake and Shiitake by Hawaii Pharm
These are the 2 active ingredients this product is made of. Select any to open its full monograph.
Serving size0.7 mL Dosage formLiquid Servings per container120 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.
Proprietary Extract Blend
Other (inactive) ingredients: Alcohol, Water, Glycerin. These complete the product’s ingredient list but are not active constituents.
Maitake and Shiitake by Hawaii Pharm Drug Interactions
HelloPharmacist Interaction Report
Maitake and Shiitake by Hawaii Pharm contains two mushroom extracts that have documented interactions with medications.
The most serious concern is with warfarin (a blood thinner), where maitake mushroom may increase its anticoagulant effect at Moderate severity — a case report showed a patient's INR (a measure of blood thickness) rose to 5.1 after taking maitake for just one week.
Read the full breakdown — every affected drug type, severity by severity
Both extracts carry Moderate-severity interactions with other drug types. Maitake may increase the blood-pressure-lowering effect of antihypertensive drugs and the blood-sugar-lowering effect of antidiabetes drugs, raising the risk of low blood pressure or low blood sugar (hypoglycemia).
Shiitake may decrease the effectiveness of immunosuppressants (drugs that calm the immune system) and may theoretically affect how your body processes certain medications metabolized by the liver enzyme CYP2D6, though this hasn't been confirmed in humans yet.
Altogether, these interactions span 550 individual medications. We could not check the proprietary extract blend itself for interactions; its component ingredients are listed individually above.
Run your exact medications through the checker on this page before you start.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Maitake and Shiitake?
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 Maitake and Shiitake interact with 557 drugs. Click any drug to see the details.
2 of the 2 ingredients in Maitake and Shiitake interact with drugs. Each result below shows which ingredient is responsible. Shiitake Mushroom Extract, Dry Maitake Mushroom Extract, Dry
6-mercaptopurinePurinethol
How 6-mercaptopurine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryImmunosuppressants Moderate
Interaction Summary
Theoretically, taking shiitake mushroom might decrease the effects of immunosuppressive therapy.
Read the full Shiitake Mushroom Extract, Dry + 6-mercaptopurine interactionAbrocitinibCibinqo
How Abrocitinib interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryImmunosuppressants Moderate
Interaction Summary
Theoretically, taking shiitake mushroom might decrease the effects of immunosuppressive therapy.
Read the full Shiitake Mushroom Extract, Dry + Abrocitinib interactionAcarboseGlucobay, Prandase, Precose
How Acarbose interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Maitake Mushroom Extract, DryAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, combining maitake mushroom with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full Maitake Mushroom Extract, Dry + Acarbose interactionAcebutololRhotral, Sectral
How Acebutolol interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Maitake Mushroom Extract, DryAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, combining maitake mushroom with antihypertensive drugs might increase the risk of hypotension.
Read the full Maitake Mushroom Extract, Dry + Acebutolol interactionAcetaminophen, Butalbital, Caffeine, CodeineEsgic with Codeine, Fioricet w/ Codeine
How Acetaminophen, Butalbital, Caffeine, Codeine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Butalbital, Caffeine, Codeine interactionAcetaminophen, Butalbital, CodeineBancap w/ Codeine
How Acetaminophen, Butalbital, Codeine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Butalbital, Codeine interactionAcetaminophen, Butalbital, Codeine PhosphatePhrenilin #3
How Acetaminophen, Butalbital, Codeine Phosphate interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Butalbital, Codeine Phosphate interactionAcetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, PhenylephrineHycomine Compound
How Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interactionAcetaminophen, Caffeine, CodeineGesic C15, Gesic C30, Gesic C8, Lenoltec 1, Lenoltec 2, Lenoltec 3 +1 more
How Acetaminophen, Caffeine, Codeine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Caffeine, Codeine interactionAcetaminophen, Caffeine, Codeine, SalicylamideCodalan No.1, Codalan No.2, Codalan No.3
How Acetaminophen, Caffeine, Codeine, Salicylamide interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Caffeine, Codeine, Salicylamide interactionAcetaminophen, Caffeine, DihydrocodeineDHC Plus, Panlor DC, Panlor SS
How Acetaminophen, Caffeine, Dihydrocodeine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Caffeine, Dihydrocodeine interactionAcetaminophen, Chlorpheniramine Maleate, Dextromethorphan HbrVicks Formula 44M Cough, Cold & Flu Relief
How Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interactionAcetaminophen, Chlorpheniramine, Codeine, PhenylephrineColrex
How Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interactionAcetaminophen, Chlorpheniramine, DextromethorphanCoricidin II Extra Strength Cold and Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Chlorpheniramine, Dextromethorphan interactionAcetaminophen, Chlorpheniramine, Dextromethorphan HydrobromideCoricidin HBP Maximum Strength Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PhenylpropanolamineMulti Symptom Cold Relief
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PseudoephedrineChildren's Tylenol Cold Plus Cough, Tylenol Cold Ex Strength
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interactionAcetaminophen, Chlorzoxazone, CodeineAcetazone Forte C8, Parafon Forte C8
How Acetaminophen, Chlorzoxazone, Codeine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Chlorzoxazone, Codeine interactionAcetaminophen, CodeineTylenol No.3, Tylenol w/ Codeine
How Acetaminophen, Codeine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Codeine interactionAcetaminophen, Codeine, DoxylamineMersyndol
How Acetaminophen, Codeine, Doxylamine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Codeine, Doxylamine interactionAcetaminophen, Codeine, MethocarbamolAcetaminophen, Codeine, Methocarbamol, Robaxacet 8
How Acetaminophen, Codeine, Methocarbamol interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Codeine, Methocarbamol interactionAcetaminophen, DextromethorphanTylenol Cough Ex Strength
How Acetaminophen, Dextromethorphan interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Dextromethorphan interactionAcetaminophen, Dextromethorphan, Doxylamine, PseudoephedrineVicks NyQuil
How Acetaminophen, Dextromethorphan, Doxylamine, Pseudoephedrine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Dextromethorphan, Doxylamine, Pseudoephedrine interactionAcetaminophen, Dextromethorphan, Guaifenesin, PhenylephrineConar-A
How Acetaminophen, Dextromethorphan, Guaifenesin, Phenylephrine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Dextromethorphan, Guaifenesin, Phenylephrine interactionAcetaminophen, Dextromethorphan, Guaifenesin, PhenylpropanolamineAnatuss
How Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine interactionAcetaminophen, Dextromethorphan, Guaifenesin, PseudoephedrineRobitussin Cold, Severe Cold, Suphedrine Cold/Cough
How Acetaminophen, Dextromethorphan, Guaifenesin, Pseudoephedrine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Dextromethorphan, Guaifenesin, Pseudoephedrine interactionAcetaminophen, Dextromethorphan, Phenylpropanolamine, PyrilamineTheracaps
How Acetaminophen, Dextromethorphan, Phenylpropanolamine, Pyrilamine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Dextromethorphan, Phenylpropanolamine, Pyrilamine interactionAcetaminophen, Dextromethorphan, PseudoephedrineAlka-Seltzer PLUS Flu Liquid Gels, Non Aspirin Cold Caps, Tylenol Cold, Tylenol Flu Daytime Ex Strength, Tylenol Flu Ex Strength
How Acetaminophen, Dextromethorphan, Pseudoephedrine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Dextromethorphan, Pseudoephedrine interactionAcetaminophen, HydrocodoneAnexsia, Anodynos DHC, Azdone, Co-Gesic, Doucet, Lorcet +9 more
How Acetaminophen, Hydrocodone interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Hydrocodone interactionAcetaminophen, MeperidineDemerol APAP
How Acetaminophen, Meperidine interacts with Maitake and Shiitake — through 1 ingredient. Tap an ingredient for the detail:
Shiitake Mushroom Extract, DryCytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
Read the full Shiitake Mushroom Extract, Dry + Acetaminophen, Meperidine interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Maitake and Shiitake with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.
Shiitake Mushroom Extract, Dry
Cytochrome P450 2D6 (Cyp2D6) Substrates
Theoretically, shiitake mushroom might decrease levels of drugs metabolized by CYP2D6.
In vitro studies suggest that the shiitake mushroom extract AHCC might induce the CYP2D6 enzyme. This effect has not been reported in humans.
Immunosuppressants
Theoretically, taking shiitake mushroom might decrease the effects of immunosuppressive therapy.
In vitro evidence suggests that shiitake mushroom extracts stimulate immune function.
Maitake Mushroom Extract, Dry
Antidiabetes Drugs
Theoretically, combining maitake mushroom with antidiabetes drugs might increase the risk of hypoglycemia.
Clinical research shows that taking maitake mushroom polysaccharide (MMP) can lower blood glucose levels in patients with types 2 diabetes.
Antihypertensive Drugs
Theoretically, combining maitake mushroom with antihypertensive drugs might increase the risk of hypotension.
Animal research shows that maitake mushroom can lower blood pressure.
Warfarin (Coumadin)
There is limited evidence that maitake mushroom may increase the anticoagulant effects of warfarin.
In a case report, a patient previously stabilized on warfarin developed an elevated international normalized ratio (INR) of 5.1 after taking maitake mushroom (Grifron-Pro Maitake D-Fraction) 1 drop/kg daily in three divided doses for one week. The elevated INR resolved after holding warfarin for two days, then reducing the dose by 11%. It is thought that the beta-glucan constituent of maitake mushroom might cause warfarin dissociation from proteins, resulting in increased free warfarin levels and increased warfarin effects.
Brand information
Manufacturer and brand details for Maitake and Shiitake, from the product label.
Hawaii Pharm
See all Hawaii Pharm products- Name
- Hawaii Pharm LLC
- Street Address
- 510 Sumner St. Ste. 613
- City
- Honolulu
- State
- HI
- ZipCode
- 96817
- Phone Number
- 888-854-2924
- Web Address
- hawaiipharm.com
Maitake and Shiitake by Hawaii Pharm: Common Questions
Does Maitake and Shiitake by Hawaii Pharm interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Can I take this if I'm on blood pressure or diabetes medication?
What are the side effects?
Is it safe during pregnancy or breastfeeding?
Does this actually work for anything?
What's the difference between this liquid and a mushroom powder?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Maitake and Shiitake 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 Maitake and Shiitake’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Maitake Mushroom
Interacts with 260 drugsMaitake is an edible mushroom long used as food and in traditional Japanese medicine, and it is being studied for possible immune, blood sugar, and blood pressure effects. The human evidence...
Read the full Maitake Mushroom monograph → Herb & supplement monographShiitake Mushroom
Interacts with 312 drugsShiitake is a popular edible mushroom that is nutritious and safe to eat as food for most people. Some of its extracts (like lentinan and AHCC) have been studied as immune support, mainly al...
Read the full Shiitake Mushroom monograph →Sources & How We Checked
Maitake and Shiitake'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 75 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.
Maitake Mushroom 8 references
- Kabir Y, Kimura S. Dietary mushrooms reduce blood pressure in spontaneously hypertensive rats (SHR). J Nutr Sci Vitaminol (Tokyo) 1989;35:91-4. PubMed
- Kabir Y, Yamaguchi M, Kimura S. Effect of shiitake (Lentinus edodes) and maitake (Grifola frondosa) mushrooms on blood pressure and plasma lipids of spontaneously hypertensive rats. J Nutr Sci Vitaminol (Tokyo) 1987;33:341-6. PubMed
- Konno S, Tortorelis DG, Fullerton SA, et al. A possible hypoglycaemic effect of maitake mushroom on Type 2 diabetic patients. Diabet Med 2001;18:1010. PubMed
- Chen JT, Tominaga K, Sato Y, et al. Maitake mushroom (Grifola frondosa) extract induces ovulation in patients with polycystic ovary syndrome: a possible monotherapy and a combination therapy after failure with first-line clomiphene citrate. J Altern Compl
- Hanselin MR, Vande Griend JP, Linnebur SA. INR elevation with maitake extract in combination with warfarin. Ann Pharmacother 2010;44:223-4. PubMed
- Talpur, N. A., Echard, B. W., Fan, A. Y., Jaffari, O., Bagchi, D., and Preuss, H. G. Antihypertensive and metabolic effects of whole Maitake mushroom powder and its fractions in two rat strains. Mol.Cell Biochem. 2002;237(1-2):129-136. PubMed
- Deng, G., Lin, H., Seidman, A., Fornier, M., D'Andrea, G., Wesa, K., Yeung, S., Cunningham-Rundles, S., Vickers, A. J., and Cassileth, B. A phase I/II trial of a polysaccharide extract from Grifola frondosa (Maitake mushroom) in breast cancer patients: i
- Wesa KM, Cunningham-Rundles S, Klimek VM, et al. Maitake mushroom extract in myelodysplastic syndromes (MDS): a phase II study. Cancer Immunol Immunother 2015;64(2):237-47. PubMed
Shiitake Mushroom 67 references
- Hitosugi M, Kitamura O, Takatsu A, Yoshino Y. Autopsy case of duodenal obstruction from impacted mushroom. J Gastroenterol 1998;33:562-5. PubMed
- Hanada K, Hashimoto I. Flagellate mushroom (Shiitake) dermatitis and photosensitivity. Dermatol 1998;197:255-7. PubMed
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- Nakamura T. Shiitake (Lentinus edodes) dermatitis. Contact Dermatitis 1992;27:65-70.
- Ueda A, Obama K, Aoyama K, et al. Allergic contact dermatitis in shiitake (Lentinus edodes (Berk) Sing) growers. Contact Dermatitis 1992;26:228-33.
- Burikhanov, R. B., Wakame, K., Igarashi, Y., Wang, S., and Matsuzaki, S. Suppressive effect of active hexose correlated compound (AHCC) on thymic apoptosis induced by dexamethasone in the rat. Endocr.Regul. 2000;34(4):181-188.
- Gao, Y., Zhang, D., Sun, B., Fujii, H., Kosuna, K., and Yin, Z. Active hexose correlated compound enhances tumor surveillance through regulating both innate and adaptive immune responses. Cancer Immunol.Immunother. 2006;55(10):1258-1266. PubMed
- Ritz, B. W., Nogusa, S., Ackerman, E. A., and Gardner, E. M. Supplementation with active hexose correlated compound increases the innate immune response of young mice to primary influenza infection. J Nutr. 2006;136(11):2868-2873. PubMed
- Aviles, H., O'Donnell, P., Sun, B., and Sonnenfeld, G. Active hexose correlated compound (AHCC) enhances resistance to infection in a mouse model of surgical wound infection. Surg.Infect.(Larchmt.) 2006;7(6):527-535. PubMed
- Spierings, E. L., Fujii, H., Sun, B., and Walshe, T. A Phase I study of the safety of the nutritional supplement, active hexose correlated compound, AHCC, in healthy volunteers. J Nutr Sci Vitaminol.(Tokyo) 2007;53(6):536-539. PubMed
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- Ritz, B. W. Supplementation with active hexose correlated compound increases survival following infectious challenge in mice. Nutr.Rev. 2008;66(9):526-531. PubMed
- Terakawa, N., Matsui, Y., Satoi, S., Yanagimoto, H., Takahashi, K., Yamamoto, T., Yamao, J., Takai, S., Kwon, A. H., and Kamiyama, Y. Immunological effect of active hexose correlated compound (AHCC) in healthy volunteers: a double-blind, placebo-controll
- Mach, C. M., Fugii, H., Wakame, K., and Smith, J. Evaluation of active hexose correlated compound hepatic metabolism and potential for drug interactions with chemotherapy agents. J Soc Integr.Oncol. 2008;6(3):105-109.
- Wang, S., Welte, T., Fang, H., Chang, G. J., Born, W. K., O'Brien, R. L., Sun, B., Fujii, H., Kosuna, K., and Wang, T. Oral administration of active hexose correlated compound enhances host resistance to West Nile encephalitis in mice. J Nutr. 2009;139(3 PubMed
- Sumiyoshi, Y., Hashine, K., Kakehi, Y., Yoshimura, K., Satou, T., Kuruma, H., Namiki, S., and Shinohara, N. Dietary administration of mushroom mycelium extracts in patients with early stage prostate cancers managed expectantly: a phase II study. Jpn.J Cl PubMed
- Yin, Z., Fujii, H., and Walshe, T. Effects of active hexose correlated compound on frequency of CD4+ and CD8+ T cells producing interferon-gamma and/or tumor necrosis factor-alpha in healthy adults. Hum.Immunol. 2010;71(12):1187-1190.
- Lee, W. W., Lee, N., Fujii, H., and Kang, I. Active Hexose Correlated Compound promotes T helper (Th) 17 and 1 cell responses via inducing IL-1beta production from monocytes in humans. Cell Immunol. 2012;275(1-2):19-23.
- Daddaoua, A., Martinez-Plata, E., Ortega-Gonzalez, M., Ocon, B., Aranda, C. J., Zarzuelo, A., Suarez, M. D., de Medina, F. S., and Martinez-Augustin, O. The nutritional supplement Active Hexose Correlated Compound (AHCC) has direct immunomodulatory actio
- Roman, B. E., Beli, E., Duriancik, D. M., and Gardner, E. M. Short-term supplementation with active hexose correlated compound improves the antibody response to influenza B vaccine. Nutr Res. 2013;33(1):12-17. PubMed
- Uno, K., Kosuna, K., Sun, B., Fujii, H., Wakame, K., Chikumaru, S., Hosokawa, G., and Ueda, Y. Active Hexose Correlated Compound (AHCC) Improves Immunological Parameters and Performance Status of Patients with Solid Tumors. Biotherapy 2000;14(3):303-309.
- Ghoneum, M., Wimbley, M., Salem, F., McKlain, A., Attallah, N., and Gill, G. Immunomodulatory and anticancer effects of active hexose correlated compound (AHCC). Int J Immunother 1995;11:23-28.
- Thaiudom, S., Piyaniran, W., and Chutaputthi, A. A study of the efficacy of Active Hexose Correlated Compound (AHCC) in the treatment of chronic Hepatitis C patients at Phramongkutklao Hospital. The Medical News (Thailand) 2010;325:13-16.
- Smith, J. A., Hunter, R. J., Fujii, H., Wakame, K., and Wolf, J. Defining Synergistic Activity ofthe Combination of Active Hexose Correlated Compound (AHCC) with Liposomal Doxorubicin (Doxil). Presented at the 18th International Congress on Nutrition and
- Sia, G. M. and Candlish, J. K. Effects of shiitake (Lentinus edodes) extract on human neutrophils and the U937 monocytic cell line. Phytother.Res. 1999;13(2):133-137. DOI
- Fujiwara, K., Sato, T., Yonei, T., Genba, K., Nogami, N., and Yamadori, I. [A case of chronic hypersensitivity pneumonitis induced by shiitake mushroom spores]. Nihon Kokyuki.Gakkai Zasshi 2000;38(12):908-913.
- Lippert, U., Martin, V., Schwertfeger, C., Junghans, V., Ellinghaus, B., and Fuchs, T. Shiitake dermatitis. Br.J Dermatol. 2003;148(1):178-179.
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- Sastre, J., Ibanez, M. D., Lopez, M., and Lehrer, S. B. Respiratory and immunological reactions among Shiitake (Lentinus edodes) mushroom workers. Clin.Exp.Allergy 1990;20(1):13-19.
- Liu, M., Li, J., Kong, F., Lin, J., and Gao, Y. Induction of immunomodulating cytokines by a new polysaccharide-peptide complex from culture mycelia of Lentinus edodes. Immunopharmacology 1998;40(3):187-198. PubMed
- Ade R, Sukut C, Wiser HJ, Shockman S, Buescher L. Shiitake dermatitis demonstrating Köebner phenomenon. Int J Dermatol. 2015;54(5):e179-81.
- Adler MJ, Larsen WG. Clinical variability of shiitake dermatitis. J Am Acad Dermatol. 2012 Oct;67(4):e140-1. PubMed
- Adriano AR, Acosta ML, Azulay DR, Quiroz CD, Talarico SR. Shiitake dermatitis: the first case reported in Brazil. An Bras Dermatol. 2013 May-Jun;88(3):417-9. PubMed
- Ampere A, Delhaes L, Soots J, Bart F, Wallaert B. Hypersensitivity pneumonitis induced by Shiitake mushroom spores. Med Mycol. 2012 Aug;50(6):654-7. PubMed
- Baran W, Batycka-Baran A, Maj J, Szepietowski JC. Shiitake dermatitis - now also in Poland. Acta Derm Venereol. 2015 Jan;95(1):102-3. PubMed
- Boels D, Landreau A, Bruneau C, et al. Shiitake dermatitis recorded by French Poison Control Centers - new case series with clinical observations. Clin Toxicol (Phila). 2014 Jul;52(6):625-8. PubMed
- Chu EY, Anand D, Dawn A, Elenitsas R, Adler DJ. Shiitake dermatitis: a report of 3 cases and review of the literature. Cutis. 2013 Jun;91(6):287-90.
- Corazza M, Zauli S, Ricci M, et al. Shiitake dermatitis: toxic or allergic reaction? J Eur Acad Dermatol Venereol. 2015 Jul;29(7):1449-51. PubMed
- Czarnecka AB, Kreft B, Marsch WCh. Flagellate dermatitis after consumption of Shiitake mushrooms. Postepy Dermatol Alergol. 2014 Jun;31(3):187-90. PubMed
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- Kopp T, Mastan P, Mothes N, Tzaneva S, Stingl G, Tanew A. Systemic allergic contact dermatitis due to consumption of raw shiitake mushroom. Clin Exp Dermatol. 2009 Dec;34(8):e910-3. PubMed
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- Luber AJ, Ackerman LS. Flagellate shiitake mushroom dermatitis. Dermatol Online J. 2015 Aug 15;21(8). pii: 13030/qt7rm57553. DOI
- Mendonça CN, Silva PM, Avelleira JC, Nishimori FS, Cassia Fde F. Shiitake dermatitis. An Bras Dermatol. 2015 Mar-Apr;90(2):276-8.
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- Nguyen AH, Gonzaga MI, Lim VM, Adler MJ, Mitkov MV, Cappel MA. Clinical features of shiitake dermatitis: a systematic review. Int J Dermatol. 2017 Jun;56(6):610-616. PubMed
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- Ricar J, Pizinger K, Cetkovska P. Shiitake dermatitis: a distinctive clinical entity. Int J Dermatol. 2013 Dec;52(12):1620-1. PubMed
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- Wang AS, Barr KL, Jagdeo J. Shiitake mushroom-induced flagellate erythema: A striking case and review of the literature. Dermatol Online J. 2013 Apr 15;19(4):5. DOI
- Tan J, Yuan K, Zuo J, et al. Two cases of small bowel obstruction due to a shiitake mushroom. Gastroenterol Rep (Oxf) 2019;7(4):298-300. doi: 10.1093/gastro/gox028. PubMed
- Boels D, Greillet C, Langrand J, et al. Shiitake dermatitis: experience of the Poison Control Centre Network in France from 2014 to 2019. Clin Toxicol (Phila) 2022. PubMed
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- Ma JY, Liu JW. Shiitake flagellate dermatitis. Mayo Clin Proc 2022;97(12):2192-2193. PubMed
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- Sudy E, Urbina F. Shiitake dermatitis: clinical forms of presentation. Int J Dermatol 2023. PubMed
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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.
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