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Dietary supplement

Oregano Oil Liquid Extract Alcohol & Sugar Free Ingredients & Drug Interactions

by Swanson

Oregano Oil Liquid Extract Alcohol & Sugar Free label
See full label image
Liquid Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 30, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Oregano Oil Liquid Extract Alcohol & Sugar Free 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 Liquid Extract Alcohol & Sugar Free is a dietary supplement by Swanson 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 Essential Oil. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against Oregano Oil Liquid Extract Alcohol & Sugar Free by Swanson

Ask about any prescription or over-the-counter medication and we check it for interactions with Oregano Oil Liquid Extract Alcohol & Sugar Free by Swanson — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Oregano Oil Liquid Extract Alcohol & Sugar Free by Swanson

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 essential oil. Oregano oil is a concentrated extract of the oregano plant, much stronger than the dried herb you'd sprinkle on pizza.

The product also includes olive oil as an inactive ingredient to carry the oil.

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: Immune health support.
  • Our graded evidence for these ingredients doesn't cover that particular purpose.

The evidence we hold doesn't establish whether oregano oil works for any condition. Studies haven't produced reliable proof that it helps with acne, bronchitis, asthma, headache, or upper respiratory infections.

That doesn't mean it doesn't work—just that the data to back it up isn't in yet.

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 as a food is well tolerated, but this supplement is a concentrated extract and hasn't been studied as thoroughly as whole food. The most common side effect when taken by mouth is stomach upset.

Rarely, some people have had serious allergic reactions, including anaphylaxis (a severe, life-threatening reaction), especially if they're sensitive to the Lamiaceae plant family (which includes oregano and thyme). Applied to skin, oregano oil can cause irritation or allergic contact dermatitis in sensitive people.

During pregnancy, the safety data advises against taking medicinal or supplement amounts of oregano; food amounts are likely fine. While breastfeeding, the safety of oregano supplements isn't established—talk with your doctor or pharmacist for personalized advice if you're considering it.

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 you take this product, check with your doctor or pharmacist if you're on a blood thinner (such as warfarin, aspirin, or clopidogrel) or a diabetes medication. Oregano oil may increase bleeding risk or lower blood sugar further, both with Moderate-severity concerns.

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.

Swanson's oregano oil extract is worth a conversation with your doctor or pharmacist if you take blood thinners or diabetes medications, since it may affect how they work. If you have a known allergy to oregano, thyme, or other plants in the mint family, steer clear.

Anyone considering it should discuss it with their own healthcare provider first.

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 Feb 22, 2024.

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 Liquid Extract Alcohol & Sugar Free, straight from the product label.

Brand Swanson
Barcode (UPC) 087614111735
Net contents 1 Fluid Ounce(s); 29.6 mL
Market status On market
Date entered into DSLD Feb 22, 2024
DSLD ID 308459
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Women (not pregnant or lactating), Sugar 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 Liquid Extract Alcohol & Sugar Free by Swanson, 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:
0.17 mL
Maximum serving Sizes:
0.17 mL
Servings per container
174
UPC/BARCODE
087614111735
IngredientAmount% DV
Oregano Essential Oil13 mg--

Other ingredients: 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.
Formulation

Immune Health

Alcohol & Sugar Free

FDA Statement of Identity

Herbal Supplement

Suggested/Recommended/Usage/Directions

Suggested Use: As a dietary supplement, mix four drops (0.17 ml) in a glass of water three times per day. Do not exceed recommended dosage. Shake well before use.

Precautions

Do not exceed recommended dosage.

Warning: For adults only.

Do not take this product if you are pregnant or nursing. Consult your healthcare provider before using this or any product if you are taking medication or have a medical condition.

Keep out of reach of children.

Do not use if seal is broken.

Storage

Store in a cool, dry place. Do not refrigerate or freeze.

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.

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

See for yourself

Oregano Oil Liquid Extract Alcohol & Sugar Free by Swanson label

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

Oregano Oil Liquid Extract Alcohol & Sugar Free 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 Liquid Extract Alcohol & Sugar Free by Swanson

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

Serving size0.17 mL Dosage formLiquid Servings per container174 Amounts shown are per serving.

Oregano Essential Oil

Interacts with
208 drugs
13 mg 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...

Oregano Essential Oil monograph & interactions

Other (inactive) ingredients: Olive Oil. These complete the product’s ingredient list but are not active constituents.

Interaction report

Oregano Oil Liquid Extract Alcohol & Sugar Free by Swanson Drug Interactions

Want to check YOUR meds against Oregano Oil Liquid Extract Alcohol & Sugar Free?

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 Essential Oil 208

Individual Drug Interactions

The ingredients in Oregano Oil Liquid Extract Alcohol & Sugar Free interact with 208 drugs. Click any drug to see the details.

1 of the 1 ingredient in Oregano Oil Liquid Extract Alcohol & Sugar Free interact with drugs. Each result below shows which ingredient is responsible. Oregano Essential Oil

Each ingredient & the kinds of drugs it affects

For each ingredient in Oregano Oil Liquid Extract Alcohol & Sugar Free 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 Essential 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 Essential Oil full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Oregano Oil Liquid Extract Alcohol & Sugar Free, from the product label.

Swanson

See all Swanson products
Name
Swanson Health Products
City
Fargo
State
ND
ZipCode
58104
Phone Number
1-800-437-4148
Web Address
www.swanson.com
Pharmacist Counseling Corner

Oregano Oil Liquid Extract Alcohol & Sugar Free by Swanson: Common Questions

Does Oregano Oil Liquid Extract Alcohol & Sugar Free by Swanson interact with any medications?
Yes. Based on its ingredients, Oregano Oil Liquid Extract Alcohol & Sugar Free 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 Liquid Extract Alcohol & Sugar Free 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 this if I'm pregnant?
The safety data advises against taking medicinal or supplement amounts of oregano during pregnancy. Food amounts—like oregano on your dinner—are likely fine. Talk with your doctor or pharmacist for personalized guidance.
Can I take this while breastfeeding?
We don't have enough data to know whether oregano supplements are safe while breastfeeding. Stick to normal food amounts, and chat with your doctor or pharmacist if you're thinking about taking a supplement.
What side effects might I notice?
Stomach upset is the most common. Rarely, people have had serious allergic reactions. If you have a history of allergy to oregano, thyme, or other mint-family plants, be cautious.
Does oregano oil actually work for colds or bronchitis?
We don't have reliable evidence that it does. Studies haven't proven oregano oil helps these conditions, though that doesn't rule it out—the research just isn't there yet.
Why is this concentrate so much stronger than dried oregano?
This is oregano essential oil, a concentrated extract of the plant's active compounds. It's far more potent than the dried herb you'd cook with, which is why we know less about its safety at supplement doses.
Is this just oregano seasoning in a bottle?
No. This is a concentrated essential oil extract, much stronger than the culinary herb. The supplement contains oregano oil and olive oil as an inactive ingredient.

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

Not sure if Oregano Oil Liquid Extract Alcohol & Sugar Free 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 Liquid Extract Alcohol & Sugar Free label
Go deeper

The Full Monographs Behind Oregano Oil Liquid Extract Alcohol & Sugar Free’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 Liquid Extract Alcohol & Sugar Free'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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