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

Oregano Oil Ingredients & Drug Interactions

by L.A. Naturals

Oregano Oil label
See full label image
Capsule Category: Other Combinations
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 Oregano Oil 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

Oregano Oil is a dietary supplement by L.A. Naturals with 2 active ingredients. Its ingredients are commonly taken for digestive upset, respiratory and cold symptoms, antimicrobial support.Based on those ingredients, 208 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Oil of Oregano. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Oregano Oil by L.A. Naturals

Ask about any prescription or over-the-counter medication and we check it for interactions with Oregano Oil by L.A. Naturals — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Oregano Oil by L.A. Naturals

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 Aug 27, 2026

What’s inside

Partial disclosure
Ingredient Transparency · database check
Partial

Most active ingredients list an amount, but at least one is hidden in a blend or missing.

Why this rating?
  • The label discloses an exact amount for 1 of its 2 active ingredients.
  • “Oil of Oregano” is listed as a grouped ingredient — the label gives one combined amount (510 mg) without saying how much of each component you get.
  • “contains 45 mg pure Oregano Oil” is listed as a grouped ingredient — the label gives one combined amount (45 mg) without saying how much of each component you get.

This product contains 2 active ingredients: oregano oil and its isolated component carvacrol. The oregano oil supplies 45 mg of pure oil per capsule, with 32 mg of carvacrol noted separately.

The capsule also holds non-GMO soy lecithin, modified vegetable cellulose, and cold-pressed extra virgin olive oil as inactive ingredients.

Does it work?

Not established
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Not established

The graded evidence we hold for these ingredients covers different conditions than the ones this product is marketed for, so there's no established rating for its stated use — see Oregano's own graded uses on its monograph.

Why this rating?
  • The label markets this product for: immediate immune support.
  • We looked for evidence on: Upper respiratory tract infection (URTI), Bronchitis, Cough, Rhinosinusitis, Intestinal parasite infection, antimicrobial support — and 2 related terms.
  • The closest evidence on file: Oregano is rated "Insufficient Reliable Evidence To Rate" for Bronchitis (Natural Medicines).
  • Also on file: Oregano is rated "Insufficient Reliable Evidence To Rate" for Upper respiratory tract infection (URTI), Cough, Intestinal parasite infection, Rhinosinusitis.

The evidence on oregano oil for acne, bronchitis, asthma, headache, and upper respiratory tract infection is insufficient. We don't have reliable data in our records to say whether it works for these uses.

The evidence, ingredient by ingredient Oregano

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.

Oregano is well tolerated in food amounts, but concentrated supplements are stronger and less studied. Gastrointestinal upset is the most common side effect when taken orally.

Rare serious reactions include allergic responses — including anaphylaxis — and topical dermatitis in sensitive people. Avoid oregano supplements during pregnancy; food amounts are likely fine.

Safety while breastfeeding isn't established, so stick to normal food amounts if you're nursing.

Side effects, ingredient by ingredient Oregano

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 — Oregano.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; diabetes medications.
  • For scale: 208 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.

Check with your doctor or pharmacist before taking this if you're on blood thinners (anticoagulants or antiplatelet drugs like warfarin, clopidogrel, or aspirin) or diabetes medications. Oregano might increase bleeding risk or lower blood sugar when combined with these drugs.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glancePartially disclosed formula with no established evidence rating for its marketed use. Moderate medication interactions have been identified, and safety information is well characterized.

Oregano oil supplements may appeal to you if you're looking for a herbal option, but the evidence for its uses isn't solid yet. If you take blood thinners or diabetes medications, check with your doctor or pharmacist before adding this — the theoretical risk of bleeding or low blood sugar is worth reviewing with them.

Anyone with a known sensitivity to oregano or related plants (like thyme) should be cautious.

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

Assessment coverage: 1 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jul 25, 2014.

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 Oregano Oil, straight from the product label.

Brand L.A. Naturals
Barcode (UPC) 641356083929
Net contents 120 Liquid Veggie Cap(s)
Market status On market
Date entered into DSLD Jul 25, 2014
DSLD ID 35250
Product type Other Combinations
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Vegetarian, Adult (18 - 50 Years), Gluten Free, Dairy Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Oregano Oil by L.A. Naturals, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1 Veggie Cap(s)
Maximum serving Sizes:
3 Veggie Cap(s)
Servings per container
120
UPC/BARCODE
641356083929
IngredientAmount% DV
Oil of Oregano510 mg--
contains 45 mg pure Oregano Oil45 mg--
32 mg carvacrol32 mg--
wild Mediterranean Oregano0 NP--

Other ingredients: non-GMO Soy Lecithin, Modified Vegetable Cellulose, cold pressed Extra Virgin Olive Oil

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.
General Statements

SINGLE LIQUID EXTRACT MEDICINAL BOTANICALS POWERFUL EXTRACTS

Immediate Immune Support

MADE IN THE USA

Formulation

100% Vegetarian

No Gluten, No Dairy (Milk or Lactose), No Nuts, No Egg, No Fish or Shellfish, Suitable for Vegetarians, No Artificial Preservatives, Sweeteners or Colors

No Gluten, No Dairy (Milk or Lactose), No Nuts, No Egg, No Fish or Shellfish, Suitable for Vegetarians, No Artificial Preservatives, Sweeteners or Colors

Brand IP Statement(s)

CARVACROL 70(TM)

FDA Statement of Identity

DIETARY SUPPLEMENT

Seals/Symbols

CAP-PRO

L.a.(TM)

Suggested/Recommended/Usage/Directions

SUGGESTED USE: Generally 1 Veggie Cap 1-3 times daily Acute: 2-3 Veggie Caps 3 times daily with water

Precautions

WARNINGS: Keep out of the reach of children.

FDA Disclaimer Statement

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

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

See for yourself

Oregano Oil by L.A. Naturals label

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

Oregano Oil 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 Oregano Oil by L.A. Naturals

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

Serving size1 Veggie Cap(s) Dosage formCapsule 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.

Oil of Oregano

Interacts with
208 drugs
510 mg per serving

Oregano is a common Mediterranean cooking herb that is also sold as a concentrated oil or supplement, often standardized for a compound called carvacr...

Oil of Oregano monograph & interactions

Wild Mediterranean Oregano

Interacts with
208 drugs
0 NP per serving Form: Carvacrol

Oregano is a common Mediterranean cooking herb that is also sold as a concentrated oil or supplement, often standardized for a compound called carvacr...

Wild Mediterranean Oregano monograph & interactions

Other (inactive) ingredients: Non-GMO Soy Lecithin, Modified Vegetable Cellulose, Cold pressed Extra Virgin Olive Oil. These complete the product’s ingredient list but are not active constituents.

Interaction report

Oregano Oil by L.A. Naturals Drug Interactions

Want to check YOUR meds against Oregano Oil?

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
208Drugs
208 Moderate

Ingredients driving the most interactions

Oil of Oregano 208

Individual Drug Interactions

The ingredients in Oregano Oil interact with 208 drugs. Click any drug to see the details.

1 of the 2 ingredients in Oregano Oil interact with drugs. Each result below shows which ingredient is responsible. Oil of Oregano

Each ingredient & the kinds of drugs it affects

For each ingredient in Oregano Oil 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.

Oil of Oregano2 drug types · 208 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, oregano might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
In vitro research shows that aristolochic acid isolated from oregano leaves has antithrombin activity. It has also been reported that oregano oil inhibits arachidonic acid-induced, and ADP-induced, platelet aggregation.

Likelihood Possible Evidence D
Antidiabetes Drugs

Theoretically, oregano might increase the risk for hypoglycemia when taken with antidiabetes drugs.
In vitro and animal research shows that oregano extracts might lower blood glucose levels.

Likelihood Possible Evidence D
Oil of Oregano full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Oregano Oil, from the product label.

L.A. Naturals

See all L.A. Naturals products
Name
Palko Services
Street Address
4991 W. US Hwy 20
City
Michigan City
State
IN
ZipCode
46360
Pharmacist Counseling Corner

Oregano Oil by L.A. Naturals: Common Questions

Does Oregano Oil by L.A. Naturals interact with any medications?
Yes. Based on its ingredients, Oregano Oil has a known interaction with 208 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Oregano Oil contains 2 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Is oregano oil safe to take while pregnant?
Oregano in food amounts is likely fine, but medicinal or supplement doses are not advised during pregnancy. Talk with your doctor or pharmacist about what's right for you.
Can I take this while breastfeeding?
Safety of oregano supplements while breastfeeding isn't established. Stick to normal food amounts if you're nursing, and ask your doctor or pharmacist if you want to use a supplement.
What side effects might I get from oregano oil?
Gastrointestinal upset is most common. Rare but serious allergic reactions — including anaphylaxis — have been reported, as well as topical skin irritation in sensitive people.
Does oregano oil actually work for respiratory infections or asthma?
The evidence we have isn't strong enough to say. Studies haven't reliably shown that oregano oil helps with these conditions.
What are carvacrol and wild Mediterranean oregano?
Carvacrol is a chemical component found in oregano oil. Wild Mediterranean oregano is the plant source of the oil in this capsule — it's where the active compounds come from.

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

Not sure if Oregano Oil is safe with your meds?

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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.

Oregano Oil label
Go deeper

The Full Monographs Behind Oregano Oil’s Ingredients

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

Herb & supplement monograph

Oregano

Interacts with 208 drugs

Oregano is a common Mediterranean cooking herb that is also sold as a concentrated oil or supplement, often standardized for a compound called carvacrol. While lab studies suggest it may hav...

Read the full Oregano monograph →
Sources

Sources & How We Checked

Oregano Oil'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 12 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.

Oregano 12 references
  1. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  2. Benito M, Jorro G, Morales C, et al. Labiatae allergy: systemic reactions due to ingestion of oregano and thyme. Ann Allergy Asthma Immunol 1996;76:416-8. PubMed
  3. Chevallier A. Encyclopedia of Herbal Medicine. 2nd ed. New York, NY: DK Publ, Inc., 2000.
  4. Ciganda C, and Laborde A. Herbal infusions used for induced abortion. J Toxicol.Clin Toxicol. 2003;41:235-239. PubMed
  5. Futrell, J. M. and Rietschel, R. L. Spice allergy evaluated by results of patch tests. Cutis 1993;52(5):288-290.
  6. Tognolini, M., Barocelli, E., Ballabeni, V., Bruni, R., Bianchi, A., Chiavarini, M., and Impicciatore, M. Comparative screening of plant essential oils: phenylpropanoid moiety as basic core for antiplatelet activity. Life Sci. 2-23-2006;78(13):1419-1432. PubMed
  7. Goun, E., Cunningham, G., Solodnikov, S., Krasnykch, O., and Miles, H. Antithrombin activity of some constituents from Origanum vulgare. Fitoterapia 2002;73(7-8):692-694. PubMed
  8. Lemhadri, A., Zeggwagh, N. A., Maghrani, M., Jouad, H., and Eddouks, M. Anti-hyperglycaemic activity of the aqueous extract of Origanum vulgare growing wild in Tafilalet region. J Ethnopharmacol. 2004;92(2-3):251-256. PubMed
  9. McCue, P., Vattem, D., and Shetty, K. Inhibitory effect of clonal oregano extracts against porcine pancreatic amylase in vitro. Asia Pac.J Clin.Nutr. 2004;13(4):401-408.
  10. Ragi, J., Pappert, A., Rao, B., Havkin-Frenkel, D., and Milgraum, S. Oregano extract ointment for wound healing: a randomized, double-blind, petrolatum-controlled study evaluating efficacy. J.Drugs Dermatol. 2011;10(10):1168-1172.
  11. Singletary K. Oregano: overview of the literature on health benefits. Nutrition Today 2010;45(3):129-38.
  12. Silva MLAE, Lucarini R, Dos Santos FF, et al. Hypoglycemic effect of rosmarinic acid-rich infusion (RosCE) from Origanum vulgare in alloxan-induced diabetic rats. Nat Prod Res 2022;36(17):4525-4531.

See these in context on the Oregano 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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