Drug & supplement interaction

Lion's Mane Mushroom + Ivermectin

Ivermectin brand names: Stromectol, Mectizan, Sklice, Soolantra.

No Known Interaction

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Updated July 2026 · Pair last verified Sep 13, 2026

The bottom line No known interaction

We found no known interaction between Lion's Mane Mushroom and Ivermectin in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first. Additionally, although there is no interaction, the label for Ivermectin states a food rule worth keeping to, and the two are separately associated with some of the same side effects, which would make a new symptom harder to attribute to one or the other.

Know someone taking this? Share

Facebook Post Reddit Email

On this page

Interaction report

Lion's Mane Mushroom and Ivermectin

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Ivermectin and Lion's Mane Mushroom in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Lion's Mane Mushroom safety at a glance

Lion's Mane Mushro... overall Use caution Generally well tolerated as a food, but supplement safety has not been well studied long-term.

Pregnancy Avoid Not enough safety data, so it is best to avoid during pregnancy.

Breastfeeding Avoid Not enough safety data, so it is best to avoid while breastfeeding.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Ivermectin and Lion's Mane Mushroom? Ask Dr. Brian Staiger, PharmD, BCPS directly ›

How we checked

Why No Interaction Is Listed for Ivermectin

Interactions in our licensed database are recorded against drug classes, not just single drug names. Ivermectin is filed under 4 classifications — including topical drugs, p-glycoprotein substrates, oral drugs. Lion's Mane Mushroom has documented interactions with 3 drug classes — the most serious being anticoagulant/antiplatelet drugs (moderate), antidiabetes drugs (moderate) and immunosuppressants (moderate) — and none of Ivermectin’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Lion's Mane Mushroom Does Interact With Other Medications

Lion's Mane Mushroom has 327 moderate known drug interactions in our database — Ivermectin isn’t one of them. If you take anything else, check it against the full list below.

Moderate 327 No known interaction 2,503 (incl. Ivermectin)

Taking anything else?

Check Another of Your Medications Against Lion's Mane Mushroom

Covers the 2,830 medications we’ve checked against Lion's Mane Mushroom. Pick one to open its full report.

What to actually watch for

No Interaction Found — But Data Suggests Lion's Mane Mushroom and Ivermectin May Share Several of the Same Side Effects

This is not an interaction. Neither one changes how your body handles the other, and nothing here says they react together. What our sources do show is that each has separately been linked to the effects below — so taking both can make those effects more likely to turn up, and harder to pin on one or the other if they do.

A skin rash Additional detail

Lion's Mane Mushroom

“Orally, lion's mane mushroom is generally well tolerated.

Most Common Adverse Effects:

Orally: Gastrointestinal discomfort, nausea, skin rash.”

Lion's Mane Mushroom · Natural Medicines adverse-effect record, reported in nausea and vomiting.

Ivermectin

Listed in the ADVERSE REACTIONS section of the FDA label for Ivermectin. Read the label on DailyMed ›
Nausea Additional detail
Lion's Mane Mushroom
“Orally, lion's mane mushroom may cause gastrointestinal discomfort and nausea.”

Lion's Mane Mushroom · Natural Medicines adverse-effect record, reported in nausea and vomiting.
2 sources cited

91999. Mori K, Inatomi S, Ouchi K, Azumi Y, Tuchida T. Improving effects of the mushroom Yamabushitake (Hericium erinaceus) on mild cognitive impairment: a double-blind placebo-controlled clinical trial. Phytother Res. 2009;23(3):367-72.

105546. Li IC, Chang HH, Lin CH, et al. Prevention of early Alzheimer's disease by erinacine A-enriched Hericium erinaceus mycelia pilot double-blind placebo-controlled study. Front Aging Neurosci 2020 Jun 3;12:155. doi: 10.3389/fnagi.2020.00155. PubMed
Ivermectin

Listed in the ADVERSE REACTIONS section of the FDA label for Ivermectin. Read the label on DailyMed ›

Reported for Lion's Mane Mushroom but not commonly for Ivermectin: stomach upset.

Effects for Ivermectin come from the ADVERSE REACTIONS section of its FDA label; effects for Lion's Mane Mushroom come from the Natural Medicines adverse-effect record, quoted above. Where a percentage is shown, it is the share of 6,298 voluntary FDA FAERS reports for Ivermectin that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

How to take them

Some Ivermectin Products Have a Food Rule — Lion's Mane Mushroom Should Not Break It

At least one FDA label for a product containing Ivermectin says to take it on an empty stomach. Most supplements — Lion's Mane Mushroom included — are taken with a meal, so the easy mistake is swallowing both together at breakfast. Where that rule applies, keep Ivermectin on its own and move Lion's Mane Mushroom to a meal later in the day.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two Ivermectin products can carry different directions, and extended-release forms often differ from immediate-release ones. The label we read is quoted below — check the directions on your own box or bottle, or ask your pharmacist, for how to take the exact product you were given.

Patients should take tablets on an empty stomach with water.

From the Dosage and Administration section of the FDA label we read for Ivermectin — where that label names a specific product, the instruction is that product's. Read the label on DailyMed ›

A food rule is not an interaction — it is about how much of the medicine you absorb. The directions that came with your own product, and your pharmacist, outrank anything on this page.

From our Q&A

Questions About Lion's Mane Mushroom or Ivermectin

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Lion's Mane Mushroom or Ivermectin, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Ivermectin

This page covers Lion's Mane Mushroom only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Ivermectin page lists 58 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), St. John's Wort (major), Sweet Orange (major), Bitter Melon (moderate) and Black Pepper (moderate).

By severity: 3 major · 37 moderate · 18 minor.

Open the Ivermectin interaction page

One more smart check

Taking Lion's Mane Mushroom as Part of a Dietary Supplement Product? Check It for Interactions

We hold 1,338 real supplement products containing Lion's Mane Mushroom, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Lion's Mane Mushroom. Even though Lion's Mane Mushroom itself has no known interaction with Ivermectin, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Lion's Mane Mushroom and Ivermectin Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Lion's Mane Mushroom

Top 10%

#130 of 1,452 supplements looked up here in the last 7 days

29 days ago today

Medication Ivermectin

Top 1%

#12 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Where does our data come from?

Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Lion's Mane Mushroom reference on this page ↓
Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Lion's Mane Mushroom and Ivermectin records this page draws on were last updated July 10, 2026.
What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.

Data structure & sourcing designed and verified by Dr. Brian Staiger, PharmD, BCPS.

Supplement

About Lion's Mane Mushroom

What is Lion's Mane Mushroom?

Memory and cognitive support
Nerve health
Mood and anxiety
Immune support
General wellness/antioxidant

Lion's mane is an edible mushroom that is popular as a 'nootropic' for memory, focus, and nerve health, but solid human evidence is still limited and early. It is generally well tolerated as a food and supplement, but talk with your pharmacist or doctor before starting it, especially if you are pregnant, breastfeeding, or have allergies.

Hericium erinaceus · Hericiaceae · Fruiting body and mycelium · Capsules, powders, tablets, tinctures, teas, and as a culinary mushroom

An interaction check asks whether these two react with each other — it does not ask whether Lion's Mane Mushroom is a good idea for someone in your situation. Here is what our Lion's Mane Mushroom record says about it on its own.

Lion's Mane Mushroom: dosing

There is no official or standardized dose for lion's mane. The amounts used in studies have varied widely depending on the form (whole mushroom, fruiting body extract, or mycelium).The best advice is to follow the directions on the product label and not to exceed them. Because products differ a lot in strength and quality, look for brands that use third-party testing.

From our Lion's Mane Mushroom monograph — the full record covers uses, side effects and every documented interaction.

Read the full Lion's Mane Mushroom monograph & all interactions

Medication

About Ivermectin

What Is Ivermectin Used For?

Brand names: Stromectol, Mectizan, Sklice, Soolantra

Ivermectin tablets (including Stromectol) are used to treat two parasitic infections: strongyloidiasis (a roundworm infection of the intestinal tract) and onchocerciasis (river blindness, caused by a parasitic worm spread by blackfly bites). These are prescription uses for serious infections.

Topical ivermectin lotion — sold under several names including RID One and Done, Head Lice Treatment Ivermectin Lotion, Scalp Care Lotions, and others — is applied to the scalp to treat head lice. A separate topical ivermectin cream (1%), available as Soolantra and ivermectin cream 1%, is used to treat the inflammatory pimple-like bumps of rosacea.

Most-Reported Side Effects for Ivermectin

From FAERS, the FDA’s public side-effect reporting system (6,298 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Headache 647 reports

Asthenia 590 reports

Fever 485 reports

Pruritus 388 reports

Diarrhea 292 reports

See full Ivermectin drug information

Keep checking

Other Drugs & Lion's Mane Mushroom

Browse every other medication we’ve checked against Lion's Mane Mushroom — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major

327Moderate

0Minor

2,502No known interaction

327 Moderate 2,502 No interaction

Moderate

327 interactions

Showing 60 of 327 moderate interactions — see all 327 on the Lion's Mane Mushroom page.

No interaction 2,502 drugs checked — show the list

We also checked Lion's Mane Mushroom against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,502 medications checked with no known interaction — see the full Lion's Mane Mushroom list.

See the full Lion's Mane Mushroom interactions page

See every supplement checked against Ivermectin, ranked by severity

Evidence & sources

Lion's Mane Mushroom References

The 6 references that drive our Lion's Mane Mushroom monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

Product information for <em>Niaspan</em>. Abbott Laboratories. North Chicago, IL 60064. April 2015.
Liang B, Guo Z, Xie F, Zhao A. Antihyperglycemic and antihyperlipidemic activities of aqueous extract of Hericium erinaceus in experimental diabetic rats. BMC Complement Altern Med. 2013;13:253. PubMed
Mori K, Inatomi S, Ouchi K, Azumi Y, Tuchida T. Improving effects of the mushroom Yamabushitake (Hericium erinaceus) on mild cognitive impairment: a double-blind placebo-controlled clinical trial. Phytother Res. 2009;23(3):367-72.
Mori K, Kikuchi H, Obara Y, et al. Inhibitory effect of hericenone B from Hericium erinaceus on collagen-induced platelet aggregation. Phytomedicine. 2010;17(14):1082-5. PubMed
Li IC, Chang HH, Lin CH, et al. Prevention of early Alzheimer's disease by erinacine A-enriched Hericium erinaceus mycelia pilot double-blind placebo-controlled study. Front Aging Neurosci 2020 Jun 3;12:155. doi: 10.3389/fnagi.2020.00155. PubMed
Tian B, Liu R, Xu T, et al. Modulating effects of Hericium erinaceus polysaccharides on the immune response by regulating gut microbiota in cyclophosphamide-treated mice. J Sci Food Agric 2023;103(6):3050-3064.

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Taking Lion's Mane Mushroom and Ivermectin Together: Common Questions

Is it safe to take Lion's Mane Mushroom with Ivermectin?

We do not list a known interaction between Lion's Mane Mushroom and Ivermectin. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.

Do Lion's Mane Mushroom and Ivermectin have any of the same side effects?

Yes — our sources link each of them separately to 2 of the same effects. That is not an interaction: neither changes how your body handles the other. It does mean that if one of those effects turns up, it can be harder to tell which one is behind it. They are listed on this page with the source behind each.

Should I take Lion's Mane Mushroom and Ivermectin at the same time of day?

At least one FDA label for a product containing Ivermectin says to take it on an empty stomach, and supplements are usually taken with a meal — so taking them together at breakfast is the easy mistake. Where that applies, keep Ivermectin on its own and move Lion's Mane Mushroom to a meal later in the day. Food instructions belong to the product rather than the ingredient, so check the directions on your own box. This is about absorption, not an interaction.

How was the Lion's Mane Mushroom and Ivermectin combination checked?

Interactions in our licensed database are recorded against drug classes. Ivermectin is filed under 4 classifications, and Lion's Mane Mushroom has documented interactions with 3 drug classes — none of Ivermectin's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.

Does Lion's Mane Mushroom interact with any other medications?

Yes. Lion's Mane Mushroom has 327 documented drug interactions in our database — Ivermectin is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.

Does Ivermectin interact with any supplements?

Yes. Ivermectin has documented interactions with 58 supplements in our database — Lion's Mane Mushroom is not one of them. The Ivermectin interaction page linked on this page lists every one, ranked by severity.

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

Where next

Keep Exploring

Lion's Mane Mushroom monograph Uses, safety profile, and every drug interaction in one place Ivermectin drug information The full plain-English guide to this medication Ivermectin supplement interactions Every supplement checked against Ivermectin, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 6 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Ivermectin and Lion's Mane Mushroom?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.