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Dietary supplement

Oregano Oil 1500 mg Ingredients & Drug Interactions

by Mason Natural

Oregano Oil 1500 mg label
See full label image
Softgel Capsule Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 23, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Oregano Oil 1500 mg 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 1500 mg is a dietary supplement by Mason Natural with 1 active ingredient. 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 Oregano Oil. 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 1500 mg by Mason Natural

Ask about any prescription or over-the-counter medication and we check it for interactions with Oregano Oil 1500 mg by Mason Natural — 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 1500 mg by Mason Natural

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

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: oregano oil at 1500 mg per softgel. Oregano oil is a concentrated extract from oregano plant material, much more potent than the dried herb you'd sprinkle on pizza.

The softgel also holds inactive ingredients—olive oil, gelatin, vegetable glycerin, and purified water—that help deliver the oil and keep it shelf-stable.

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

We hold no graded evidence for this product's ingredients for its stated purpose.

Why this rating?
  • The label markets this product for: antioxidant protection and immune health.
  • Our graded evidence for these ingredients doesn't cover that particular purpose.

The evidence for oregano oil against acne, bronchitis, asthma, headache, or upper respiratory infections is insufficient in the data we hold. We can't tell you whether it works for these uses based on reliable studies.

If you're considering it for a specific condition, talk with your doctor about what the current research actually shows and whether it's a good fit for your situation.

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 used in normal food amounts is generally well tolerated. However, concentrated supplements like this one are stronger and less studied than culinary oregano, so the safety profile is less certain at higher doses.

The most common side effect reported with oral use is gastrointestinal upset. Rarely, people sensitive to oregano plants have experienced systemic allergic reactions, including anaphylaxis, so stop use and seek emergency care if you notice trouble breathing, swelling of the lips or tongue, or a sudden rash after taking it.

During pregnancy, the safety data advises against medicinal or supplement amounts of oregano oil; food amounts are likely fine. While breastfeeding, safety of supplements is not established, so talk with your doctor or lactation consultant before starting.

If you have a known allergy to plants in the mint family (Lamiaceae family), including thyme, you may be at higher risk for an allergic reaction.

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.

Before taking this product, double-check with your doctor or pharmacist if you're on blood thinners or antiplatelet drugs (such as warfarin or aspirin)—oregano oil may increase bleeding risk. Also confirm if you take diabetes medications, since oregano may lower blood sugar.

Altogether, these interactions span 208 individual medications.

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.

Oregano Oil 1500 mg is worth considering if you're interested in concentrated herbal support, but it's not proven effective for common uses like colds or cough. If you take blood thinners, antiplatelet drugs, or diabetes medications, check with your doctor or pharmacist first—the interaction risks are moderate.

Pregnant women should avoid supplement amounts. Talk it over with your own healthcare provider to see if it fits your situation.

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 Mar 25, 2021.

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 1500 mg, straight from the product label.

Brand Mason Natural
Barcode (UPC) 311845153197
Net contents 90 Softgel(s)
Market status On market
Date entered into DSLD Mar 25, 2021
DSLD ID 244913
Product type Botanical
Supplement form Softgel Capsule
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 Oregano Oil 1500 mg by Mason Natural, 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 Softgel(s)
Maximum serving Sizes:
1 Softgel(s)
Servings per container
90
UPC/BARCODE
311845153197
IngredientAmount% DV
Oregano Oil150 mg--

Other ingredients: Olive Oil, Gelatin, Vegetable Glycerin, purified Water

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.
Seals/Symbols

Mason guarantee Laboratory Tested cGMP Certified Good Manufacturing Practice

General Statements

Certified N Mason natural Est. 1967

Please recycle

Formula

Whole herb Oregano Oil 1500 mg

Contains naturally harvested herbal products. Therefore, natural color variation may occur in this product.

Formulation

May Support antioxidant protection & immune health

Guaranteed no added: Milk, egg, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans.

Soy free

FDA Statement of Identity

Dietary Supplement

Suggested/Recommended/Usage/Directions

Directions: Adults - Take one softgel daily, preferably with food, as a dietary supplement.

FDA Disclaimer Statement

This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Precautions

Caution: If you are pregnant, nursing, taking any medications or have any medical condition, consult your physician before use.

Discontinue use and consult your physician if any adverse reactions occur.

Keep out of reach of children.

Tamper-Evident Seal: Do not use product if seal appears tampered.

Storage

Store in a dry place under controlled room temperature: 20 degrees - 25 degrees C (68 degrees - 77 degrees F).

Brand IP Statement(s)

Mason Natural is a registered trademark and does not refer to any product or ingredient claim.

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

See for yourself

Oregano Oil 1500 mg by Mason Natural label

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

Oregano Oil 1500 mg 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 1500 mg by Mason Natural

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

Serving size1 Softgel(s) Dosage formSoftgel Capsule Servings per container90 Amounts shown are per serving.

Oregano Oil

Interacts with
208 drugs
150 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...

Oregano Oil monograph & interactions

Other (inactive) ingredients: Olive Oil, Gelatin, Vegetable Glycerin, Purified Water. These complete the product’s ingredient list but are not active constituents.

Interaction report

Oregano Oil 1500 mg by Mason Natural Drug Interactions

Want to check YOUR meds against Oregano Oil 1500 mg?

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

Oregano Oil 208

Individual Drug Interactions

The ingredients in Oregano Oil 1500 mg interact with 208 drugs. Click any drug to see the details.

1 of the 1 ingredient in Oregano Oil 1500 mg interact with drugs. Each result below shows which ingredient is responsible. Oregano Oil

Each ingredient & the kinds of drugs it affects

For each ingredient in Oregano Oil 1500 mg 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.

Oregano Oil2 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
Oregano Oil full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Oregano Oil 1500 mg, from the product label.

Mason Natural

See all Mason Natural products
Name
Mason Vitamins, Inc.
City
Miami Lakes
State
FL
ZipCode
33014
Phone Number
1-888-860-5376
Web Address
www.MasonVitamins.com
Pharmacist Counseling Corner

Oregano Oil 1500 mg by Mason Natural: Common Questions

Does Oregano Oil 1500 mg by Mason Natural interact with any medications?
Yes. Based on its ingredients, Oregano Oil 1500 mg 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 1500 mg 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.
Is oregano oil safe during pregnancy?
Medicinal or supplement amounts like this are not recommended during pregnancy based on available safety data. Food amounts of oregano are likely fine. If you're pregnant or planning to be, talk with your doctor before taking this supplement.
What's the most common side effect?
Gastrointestinal upset—stomach discomfort or digestive trouble—is the most commonly reported side effect. Oregano oil is generally well tolerated when used in food amounts, but supplements deliver much higher doses.
Can oregano oil help with a cough or bronchitis?
The evidence isn't established in our data. Oregano oil is not proven effective against bronchitis, asthma, or upper respiratory infections, so we can't tell you whether it will help. Ask your doctor about what's actually supported by research for your condition.
What's in this product besides the oregano oil?
The softgel capsule holds olive oil, gelatin, vegetable glycerin, and purified water—these are inactive ingredients that keep the oregano oil stable and allow it to be swallowed easily.
Could I have an allergic reaction to this?
Allergic reactions to oregano are rare, but they do happen—especially in people sensitive to plants in the mint family. If you notice trouble breathing, swelling of the lips or tongue, or a sudden rash after taking it, stop immediately and seek emergency care.
Is this the same as cooking with oregano?
No. This is a concentrated supplement at 1500 mg per capsule, far more potent than the pinch of dried oregano you'd add to food. That's why it's stronger and less studied than the herb you know from your kitchen.

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

Not sure if Oregano Oil 1500 mg 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 1500 mg label
Go deeper

The Full Monographs Behind Oregano Oil 1500 mg’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 1500 mg'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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