Herb & supplement monograph

False Unicorn Drug Interactions, Uses, Safety & More

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS ·Updated July 2026

What is this page for?

First and foremost: how False Unicorn interacts with medications. The heart of this page is the interaction list — every drug False Unicorn is known to interact with, and how serious each one is.

But these pages have grown well beyond that into a full monograph — what False Unicorn is, what people use it for and how strong the evidence is, its safety and side effects, and answers to the questions we’re asked most — written and reviewed by the clinical staff at HelloPharmacist. It’s educational information from our licensed clinical databases, not medical advice, and we don’t sell or endorse products. Our editorial policy

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False Unicorn Drug Interactions: The Bottom Line

From the HelloPharmacist Editorial Team · Updated July 2026

Based on the available evidence, the overall risk of a clinically significant False Unicorn drug interaction appears low for most people, though it is not zero. None of the listed interactions are rated major, and nearly all rest on lab research rather than effects seen in people.

Interactions deserving the most attention

The interaction that stands out most involves lithium. False Unicorn may act as a mild diuretic, which could slow how the body clears lithium and raise its levels, and lithium is a medicine where even small changes matter. This concern has stronger backing than the rest of the profile. Beyond that, lab studies suggest False Unicorn could raise levels of some medications cleared by certain liver enzymes, including drugs like codeine, fentanyl, and some chemotherapy and heart medications, but this has not been shown in people.

What the rest of the list means

The long list of interacting medications comes almost entirely from those lab findings about enzymes the body uses to process drugs. A predicted effect in a test tube does not mean every combination is harmful, and none of these enzyme-based interactions has been confirmed in humans. So most of the list reflects theoretical caution rather than proven risk.

Check your medications against False Unicorn

Based on HelloPharmacist’s False Unicorn interaction data and reviewed under our editorial standards.

Interaction report

Drugs that interact with False Unicorn

742 medications have a known interaction with False Unicorn, graded by severity. Select any drug for the full evidence-based detail.

Don’t want to scroll the list? Just ask.

Tell us the medications you take and we’ll check each one against False Unicorn using our pharmacist-reviewed interaction data.

AI summaries are generated from our False Unicorn interaction data for education only — always confirm with your pharmacist. How we use AI

2,830 drugs

Read The List Like a Pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
Each drug listed above links to the full report for that exact False Unicorn combination — clinical detail, likelihood, evidence level, and citations.
Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

The big picture

The kinds of drugs False Unicorn affects

Every type of medication (drug category) False Unicorn is known to interact with. Open any category for the detail — or search your exact drug in the checker above.

All 3 drug categories False Unicorn interacts with

Cytochrome P450 2d6 (cyp2d6) SubstratesCytochrome P450 3a4 (cyp3a4) SubstratesLithium

Cytochrome P450 2D6 (Cyp2D6) Substrates

In vitro, false unicorn extract inhibits cytochrome P450 2D6 (CYP2D6) activity. Theoretically, false unicorn might increase the levels of CYP2D6 substrates. Some of drugs that are CYP2D6 substrates include amitriptyline (Elavil), clozapine (Clozaril), codeine, desipramine (Norpramin), donepezil (Aricept), fentanyl (Duragesic), flecainide (Tambocor), fluoxetine (Prozac), meperidine (Demerol), methadone (Dolophine), metoprolol (Lopressor, Toprol XL), olanzapine (Zyprexa), ondansetron (Zofran), tramadol (Ultram), trazodone (Desyrel), and others.

Likelihood Possible Evidence D

Cytochrome P450 3A4 (Cyp3A4) Substrates

In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity. Theoretically, false unicorn might increase the levels of CYP3A4 substrates. Drugs that might be affected include some calcium channel blockers (diltiazem, nicardipine, verapamil), chemotherapeutic agents (etoposide, paclitaxel, vinblastine, vincristine, vindesine), antifungals (ketoconazole, itraconazole), glucocorticoids, cisapride (Propulsid), alfentanil (Alfenta), fentanyl (Sublimaze), losartan (Cozaar), fluoxetine (Prozac), midazolam (Versed), omeprazole (Prilosec), ondansetron (Zofran), propranolol (Inderal), fexofenadine (Allegra), and numerous others.

Likelihood Possible Evidence D

Lithium

False unicorn is thought to have diuretic properties. Theoretically, due to these potential diuretic effects, false unicorn might reduce excretion and increase levels of lithium. The dose of lithium might need to be decreased.

Likelihood Probable Evidence D

Monograph

False Unicorn: Uses, Safety & Side Effects

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Reviewed July 2026 ·

The bottom line

False Unicorn is a North American plant whose root has long been used in traditional medicine for women's reproductive and menstrual concerns. There is very little reliable human research to show it actually works, and safety has not been well studied, so it should be used with caution and never during pregnancy. Talk to your pharmacist or doctor before trying it.

Scientific name: Chamaelirium luteum
Family: Melanthiaceae
Part used: Root and rhizome (underground parts)
Common forms: Dried root, capsules, tinctures, liquid extracts, teas

People commonly use it for

Menstrual cramps
Menopausal symptoms
Female infertility support
Irregular periods
Digestive complaints

Popular and traditional uses — not proof it works. See “Uses & effectiveness” below for the evidence.

Safety at a glance

OverallUse caution

Safety data in humans is limited, and large doses may cause stomach upset.

PregnancyLikely Unsafe

When used orally because it is a potential uterine stimulant.

Read the full pregnancy detail

BreastfeedingInsufficient reliable information

Insufficient reliable information available; avoid using.

Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center). Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

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Overview

False Unicorn (Chamaelirium luteum) is a perennial plant native to the eastern United States. It belongs to the Melanthiaceae family and is also called Blazing Star, Helonias, Devil's Bit, and Fairywand. The part used in herbal medicine is the root and rhizome (the underground stem).

It has a long history in Native American and traditional Western herbal medicine, where it was used mainly for women's health concerns such as menstrual problems, fertility, and menopause. Today it is sold as a dried root, capsule, tincture, or tea, often in combination products marketed for hormonal balance.

It is worth knowing that wild False Unicorn has been over-harvested and is now considered a threatened or at-risk plant in parts of its native range.

Uses & effectiveness

People traditionally use False Unicorn for menstrual cramps, irregular periods, menopausal symptoms, and to support fertility. It has also been used for general digestive upset and as a tonic.

Despite this long traditional use, there is very little modern scientific evidence to show that False Unicorn works for any of these conditions. Most of what is known comes from historical herbal texts and tradition rather than well-designed human studies. There are no large, high-quality clinical trials confirming benefits for menstrual or menopausal symptoms or fertility.

Because the evidence is so limited, it is honest to say that the effectiveness of False Unicorn for any health condition is unproven.

How it works

The root contains plant compounds called steroidal saponins (such as chamaelirin). Some herbalists believe these compounds may have a mild hormone-like or "balancing" effect on the reproductive system, but this idea is largely traditional.

There is no clear, well-established scientific proof of how False Unicorn works in the body. Any proposed actions are based on its chemical makeup and old herbal theory rather than solid laboratory or human research. Claims that it acts like estrogen or directly improves fertility have not been reliably demonstrated.

Safety & precautions

The safety of False Unicorn has not been carefully studied in people. Because of this, it should be used with caution, and only after talking with a healthcare professional.

Pregnancy: Avoid False Unicorn. It has traditionally been used to affect the uterus, and there is no reliable safety information, so the risk is not worth taking.

Breastfeeding: Avoid it as well, since there is not enough information to know whether it is safe for a nursing baby.

People with hormone-sensitive conditions, those taking other medicines, children, and anyone with a chronic illness should be especially careful and check with a pharmacist or doctor first. Always buy from a reputable source, since herbal products can vary in quality and may be mislabeled.

Side effects

Reported side effects are not well documented because of limited research. The most likely problems are stomach upset, nausea, vomiting, and diarrhea, especially with larger amounts.

Large doses have historically been described as potentially toxic and irritating to the digestive tract. Allergic reactions are possible with any plant product. If you notice any unusual or severe symptoms after taking it, stop using it and seek medical advice.

False Unicorn: Reported Adverse Effects

Documented safety reports on False Unicorn from the evidence-graded Natural Medicines (TRC Healthcare) database, shown word-for-word from the licensed record.

Orally, false unicorn root seems to be generally well tolerated. Large doses have been reported to cause nausea and vomiting.

McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.

Reports by condition

Nausea and vomiting Gastrointestinal

Orally, large doses of false unicorn have been reported to cause nausea and vomiting.

Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.

Adverse-effects data: Natural Medicines, Therapeutic Research Center

Dosing

There is no established or standardized dose for False Unicorn. Traditional preparations vary widely, and the strength of commercial products differs from brand to brand.

If you choose to use it, follow the directions on the product label and do not take more than recommended. Because reliable dosing and safety data are lacking, it is best to check with a pharmacist or doctor before starting, and to avoid long-term or high-dose use.

Pregnancy & Breastfeeding

False Unicorn & Pregnancy

Likely Unsafe

When used orally because it is a potential uterine stimulant.

McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.

False Unicorn & Breastfeeding

Insufficient reliable information

Insufficient reliable information available; avoid using.

Pregnancy & lactation ratings: Natural Medicines, Therapeutic Research Center

References & further reading

The 4 references that drive our False Unicorn 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.

Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
Ho SH, Singh M, Holloway AC, Crankshaw DJ. The effects of commercial preparations of herbal supplements commonly used by women on the biotransformation of fluorogenic substrates by human cytochromes P450. Phytother Res. 2011;25(7):983-9. PubMed

Keep reading

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.

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.

Brand directory

Brands that make products with False Unicorn

34 brands in our database make a supplement containing False Unicorn.

BEMORE 11 products Christopher's Original Formulas 140 products CRI Naturals Cellular Research Institute 3 products Crystal Star 123 products Earth Friend Herb Co. 66 products Elevate Recovery Supplements 35 products Energetix 283 products Enzymatic Therapy 675 products Hawaii Pharm 4,726 products Health Concerns 444 products Healthy Choice Naturals 179 products Herb Pharm 3,320 products Herbal Terra 3,138 products Herbalist & Alchemist 613 products Integrative Therapeutics 941 products Mountain Meadow Herbs 368 products MusclePharm 112 products Natural Guardian 15 products Nature's Answer 1,655 products Nature's Sunshine 1,360 products Nutrition Now 67 products Only Natural 80 products Pure Herbs 634 products Rise-N-Shine 168 products

Product directory

Supplement products with False Unicorn

135 products in our database contain False Unicorn. Open any to see its full ingredient list and every drug interaction we check.

Pharmacist Counseling Corner

False Unicorn: Common Questions

Does False Unicorn interact with prescription medications?

Yes. We list 742 medications with a known interaction with False Unicorn. Use the checker above to see how False Unicorn interacts with a specific drug.

How are False Unicorn interactions rated?

Each interaction is graded major, moderate, or minor based on how clinically significant it is and the strength of the evidence behind it. Major interactions are the most serious and are best avoided, or used only under close professional supervision.

Is it safe to take False Unicorn with my medications?

It depends on the specific medication. Some combinations are fine, while others call for monitoring, timing changes, or should be avoided. Check your exact drug above and confirm with your pharmacist or doctor before starting, stopping, or changing anything.

Where does this False Unicorn interaction information come from?

Our interaction data is built on the Natural Medicines database — an evidence-graded reference for vitamins, herbs, and supplements — and is reviewed by licensed HelloPharmacist pharmacists, who may add clinical context.

What is False Unicorn used for?

It is traditionally used for women's health concerns such as menstrual cramps, irregular periods, menopausal symptoms, and fertility support, but there is little scientific proof it works for any of these.

Is False Unicorn safe to take?

Its safety has not been well studied. Mild stomach upset is possible, and large doses may cause nausea or vomiting, so it should be used cautiously and ideally under professional guidance.

Can I take False Unicorn while pregnant or breastfeeding?

No. Because of its traditional effects on the uterus and the lack of safety data, it should be avoided during pregnancy and breastfeeding.

Does False Unicorn really balance hormones?

There is no solid scientific evidence that it balances hormones or improves fertility; these claims come mostly from traditional use rather than proven research.

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

Keep exploring

Products that contain False Unicorn

A rotating sample of real supplements in our database that list False Unicorn — open any to see its full ingredients and every drug interaction we check.

See all 135 products with False Unicorn →

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