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Dietary supplement

Pennyroyal Powder Ingredients & Drug Interactions

by TerraVita Premium Collection

Pennyroyal Powder label
See full label image
Powder Category: 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 Pennyroyal Powder 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

Pennyroyal Powder is a dietary supplement by TerraVita Premium Collection with 1 active ingredient. Its ingredients are commonly taken for digestive upset, menstrual cramps, inducing menstruation or abortion (dangerous).Based on those ingredients, 69 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Pennyroyal, Powder. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Pennyroyal Powder by TerraVita Premium Collection

Ask about any prescription or over-the-counter medication and we check it for interactions with Pennyroyal Powder by TerraVita Premium Collection — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Pennyroyal Powder by TerraVita Premium Collection

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 11, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

This product contains one active ingredient: pennyroyal, a traditional herbal powder. There are no inactive ingredients listed.

Does it work?

Couldn't assess
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 assessable

This is a single-ingredient Pennyroyal product and its label doesn't state a use — see Pennyroyal's own graded uses on its monograph.

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.

The evidence we hold does not establish that pennyroyal works for any of its traditional uses—gallbladder disease, gout, insect repellent, colds, pneumonia, and canker sores all carry insufficient reliable evidence to support their use.

The evidence, ingredient by ingredient Pennyroyal

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.

Pennyroyal is toxic and poses serious safety concerns. The plant's essential oil has caused liver failure and death, and even herbal teas made from pennyroyal leaves can cause dizziness, nausea, and stomach cramping.

Pennyroyal is likely unsafe in pregnancy—it can cause abortion, severe poisoning, and death—and likely unsafe while breastfeeding due to its toxic compounds. The main active compound, pulegone, damages the liver and converts to menthofuran, which is also hepatotoxic.

Side effects, ingredient by ingredient Pennyroyal

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 — Pennyroyal.
  • The most serious interaction on file is rated Moderate.
  • For scale: 69 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.

Do not use this product if you take acetaminophen (Tylenol and others), as the combination raises the risk of liver damage. Use the medication checker below to verify your other medications as well.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

We cannot recommend this product. Pennyroyal is documented to be toxic to the liver, and its interactions with common pain relievers like acetaminophen increase that risk further.

If you're considering it for any health reason, talk with your pharmacist or doctor first—safer alternatives almost certainly exist.

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

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Jan 23, 2023.

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 Pennyroyal Powder, straight from the product label.

Brand TerraVita Premium Collection
Barcode (UPC) 064435136970
Net contents 1 Ounce(s)
Market status On market
Date entered into DSLD Jan 23, 2023
DSLD ID 282681
Product type Botanical
Supplement form Powder
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years)
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 Pennyroyal Powder by TerraVita Premium Collection, 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:
0.25 Teaspoon(s)
Maximum serving Sizes:
0.25 Teaspoon(s)
Servings per container
28
UPC/BARCODE
064435136970
IngredientAmount% DV
Pennyroyal, Powder1000 mg--

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.
FDA Statement of Identity

A Dietary Supplement

Brand IP Statement(s)

Copyright 2005 TerraVita - Distributed by ZooScape LLC, All Rights Reserved.

Suggested/Recommended/Usage/Directions

Directions Stir 1/4 of a teaspoon into a glass of water and consume 3 times daily, with meals.

General Statements

TerraVita is an exclusive line of premium natural products that use the finest, purest and most potent ingredients in the world. TerraVita's hallmarks are the highest possible standards of purity, potency, stability and freshness. All products are prepared with the greatest quality control, from raw materials through the entire manufacturing process, right up to the moment your product is sealed for freshness and shipped to you.

Please recycle!

FDA Disclaimer Statement

Statements not evaluated by FDA. Product not intended to diagnose, treat, cure, or prevent any disease.

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

See for yourself

Pennyroyal Powder by TerraVita Premium Collection label

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

Pennyroyal Powder 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 Pennyroyal Powder by TerraVita Premium Collection

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size0.25 Teaspoon(s) Dosage formPowder Servings per container28 Amounts shown are per serving.

Pennyroyal, Powder

Interacts with
69 drugs
1000 mg per serving

Pennyroyal is a mint-family plant whose essential oil is highly toxic and has caused serious poisonings and deaths, especially when used to try to bri...

Pennyroyal, Powder monograph & interactions
Interaction report

Pennyroyal Powder by TerraVita Premium Collection Drug Interactions

Want to check YOUR meds against Pennyroyal Powder?

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
69Drugs
69 Moderate

Ingredients driving the most interactions

Pennyroyal, Powder 69

Individual Drug Interactions

The ingredients in Pennyroyal Powder interact with 69 drugs. Click any drug to see the details.

1 of the 1 ingredient in Pennyroyal Powder interact with drugs. Each result below shows which ingredient is responsible. Pennyroyal, Powder

Each ingredient & the kinds of drugs it affects

For each ingredient in Pennyroyal Powder 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.

Pennyroyal, Powder1 drug type · 69 drugs

Acetaminophen (Tylenol, Others)

Concomitant use of pennyroyal essential oil and acetaminophen might increase the risk of acetaminophen-induced hepatotoxicity.
Pennyroyal is hepatotoxic and depletes hepatic glutathione levels in a similar manner to acetaminophen. A case report describes hepatic failure in a female who took pennyroyal and acetaminophen concurrently.

Likelihood Possible Evidence D
Pennyroyal, Powder full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Pennyroyal Powder, from the product label.

TerraVita Premium Collection

See all TerraVita Premium Collection products
Name
TerraVita Fine Whole Herbs
City
Brampton
State
Ontario
Pharmacist Counseling Corner

Pennyroyal Powder by TerraVita Premium Collection: Common Questions

Does Pennyroyal Powder by TerraVita Premium Collection interact with any medications?
Yes. Based on its ingredients, Pennyroyal Powder has a known interaction with 69 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Pennyroyal Powder contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Can I take pennyroyal powder while pregnant?
No. Pennyroyal is rated likely unsafe in pregnancy because it can cause abortion, severe poisoning, and death. Do not use it if you're pregnant or planning to become pregnant.
Is pennyroyal powder safe to use while breastfeeding?
No. Pennyroyal is rated likely unsafe while breastfeeding because its toxic compounds pass into breast milk and can harm your baby.
Does pennyroyal powder actually work for colds, gout, or other conditions?
The evidence we hold doesn't establish that it works for any of its traditional uses—colds, gout, gallbladder disease, pneumonia, canker sores, or as an insect repellent all lack sufficient reliable evidence.
What's the difference between pennyroyal leaf tea and pennyroyal essential oil?
Leaf teas cause milder side effects like dizziness and nausea, but pennyroyal essential oil is highly toxic and has caused severe liver failure and death. Even so, neither is considered safe.
Can I use pennyroyal powder if I take acetaminophen?
No. The combination increases your risk of liver damage. Both substances can harm the liver in similar ways, and using them together is documented to raise that danger significantly.
What are the side effects of pennyroyal powder?
Mild effects from leaf tea include dizziness, nausea, and abdominal cramping. Serious effects include liver failure, abortion, and death—these are rare but have been documented, especially with the essential oil.

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.

Pennyroyal Powder label
Go deeper

The Full Monographs Behind Pennyroyal Powder’s Ingredients

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

Herb & supplement monograph

Pennyroyal

Interacts with 69 drugs

Pennyroyal is a mint-family plant whose essential oil is highly toxic and has caused serious poisonings and deaths, especially when used to try to bring on a period or end a pregnancy. There...

Read the full Pennyroyal monograph →
Sources

Sources & How We Checked

Pennyroyal Powder'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 8 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.

Pennyroyal 8 references
  1. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
  2. The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
  3. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  4. Bakerink JA, Gospe SM Jr, Dimand RJ, Eldridge MW. Multiple organ failure after ingestion of pennyroyal oil from herbal tea in two infants. Pediatrics 1996;98:944-7. DOI
  5. Sudekum M, Poppenga RH, Raju N, Braselton WE Jr. Pennyroyal oil toxicosis in a dog. J Am Vet Med Assoc 1992;200:817-8.. DOI
  6. Anderson IB, Mullen WH, Meeker JE, et al. Pennyroyal toxicity: measurement of toxic metabolite levels in two cases and review of the literature. Ann Intern Med 1996;124:726-34. PubMed
  7. Sullivan JB Jr, Rumack BH, Thomas H Jr, et al. Pennyroyal oil poisoning and hepatotoxicity. JAMA 1979;242:2873-4. DOI
  8. Fozard J, Hieger M. Hepatic failure from pennyroyal tea interaction with medications metabolized by the cytochrome P450 enzymes. Am J Ther 2019 Aug 13. doi: 10.1097/MJT.0000000000001052. [Epub ahead of print]. PubMed

See these in context on the Pennyroyal 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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