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Dietary supplement

Oil of Oregano 150 mg Ingredients & Drug Interactions

by DC

Oil of Oregano 150 mg label
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Softgel Capsule 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 Oil of Oregano 150 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

Oil of Oregano 150 mg is a dietary supplement by DC 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 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 Oil of Oregano 150 mg by DC

Ask about any prescription or over-the-counter medication and we check it for interactions with Oil of Oregano 150 mg by DC — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Oil of Oregano 150 mg by DC

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 150 mg per softgel capsule. Oregano oil is a concentrated extract derived from the oregano plant and is much stronger than the dried herb you'd use in cooking.

The capsule itself is made from gelatin and vegetable glycerin, which are inactive ingredients that hold and deliver 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

This is a single-ingredient Oregano product and its label doesn't state a use — see Oregano'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 for oregano oil's effectiveness in treating conditions like acne, bronchitis, asthma, headache, or upper respiratory tract infections is currently insufficient to rate. While oregano has been studied in the lab, we don't yet have enough reliable human trial data to say whether this supplement actually works for those purposes.

If you're considering it for a specific health concern, it's worth discussing with your doctor what the current evidence shows.

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 generally well tolerated when eaten in food amounts—mostly just a bit of stomach upset now and then. This supplement, though, is a much more concentrated form and hasn't been as thoroughly studied in large doses.

A small number of people report allergic reactions, including serious ones like swelling of the lips and tongue, difficulty breathing, and in rare cases anaphylaxis, especially if you're sensitive to plants in the mint family (Lamiaceae). If you have a known allergy to oregano, thyme, basil, or other mint-family herbs, avoid this product.

Avoid this supplement during pregnancy; the safety data advises against medicinal or supplement amounts, though normal food amounts are likely fine. For breastfeeding, there isn't enough safety information about supplements, so stick to food amounts and talk with your doctor or pharmacist before taking this as a medicine.

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 use blood thinners (anticoagulants or antiplatelet drugs like warfarin, aspirin, or clopidogrel)—oregano may increase bleeding risk. Also check if you take diabetes medications, since oregano might lower blood sugar.

These are Moderate interactions, so a quick conversation with your healthcare provider is important before you start.

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.

DC's Oil of Oregano 150 mg is a concentrated herb supplement that hasn't been proven effective for common conditions like colds or bronchitis—the evidence just isn't there yet. If you take blood thinners or diabetes medications, you'll need to check with your doctor or pharmacist first because oregano may affect how those drugs work.

Pregnant people should avoid supplement amounts. It's generally well tolerated, but allergic reactions can happen, especially if you're sensitive to oregano or other mint-family herbs.

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 23, 2022.

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 Oil of Oregano 150 mg, straight from the product label.

Brand DC
Net contents 90 Softgel(s)
Market status On market
Date entered into DSLD Feb 23, 2022
DSLD ID 265931
Product type Botanical
Supplement form Softgel Capsule
Dietary claims / uses All Other
Intended target group(s) Adult (18 - 50 Years), Women (not pregnant or lactating), Gluten 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 Oil of Oregano 150 mg by DC, 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
IngredientAmount% DV
Oil of Oregano150 mg--

Other ingredients: Gelatin, Vegetable Glycerin

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.
Precautions

Tamper Evident: Do not use this product if imprinted foil seal under cap is broken or missing.

Not intended for use by persons under the age of 18.

Keep out of reach of children.

Formulation

Mfg. in an FDA Registered Facility using Good Manufacturing Practices (GMPs)

Conforms to USP <2091> for weight. Meets USP <2040> disintegration for maximum bioavailability.

Gluten free

Made in USA

Formula

Oil of Oregano is derived from Origanum vulgare, a hardy botanical with branching stems and flowering tops. This perennial herb is native to Europe, where a variety of uses have been found for the leaf and dried herb. The essential oils in Oregano leaf are especially prized for their many beneficial properties.

Suggested/Recommended/Usage/Directions

Caution: If you are pregnant or nursing do not take this product.

Directions: As a dietary supplement take 1 softgel once or twice daily, preferably with a meal.

Storage

Keep tightly closed. Store at room temperature: 59 degrees - 86 degrees F (15 degrees to 30 degrees C).

Seals/Symbols

Quali Pure

FDA Statement of Identity

Dietary Supplement

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

See for yourself

Oil of Oregano 150 mg by DC label

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

Oil of Oregano 150 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 Oil of Oregano 150 mg by DC

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.

Oil of Oregano

Interacts with
208 drugs
150 mg per serving Form: extra virgin Olive Oil

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

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

Interaction report

Oil of Oregano 150 mg by DC Drug Interactions

Want to check YOUR meds against Oil of Oregano 150 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

Oil of Oregano 208

Individual Drug Interactions

The ingredients in Oil of Oregano 150 mg interact with 208 drugs. Click any drug to see the details.

1 of the 1 ingredient in Oil of Oregano 150 mg 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 Oil of Oregano 150 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.

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 Oil of Oregano 150 mg, from the product label.

DC

See all DC products
Name
Dee Cee Laboratories, Inc.
Street Address
304 Dee Cee Ct.
City
White House
State
TN
ZipCode
37188
Pharmacist Counseling Corner

Oil of Oregano 150 mg by DC: Common Questions

Does Oil of Oregano 150 mg by DC interact with any medications?
Yes. Based on its ingredients, Oil of Oregano 150 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?
Oil of Oregano 150 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.
Can I take this if I'm pregnant or breastfeeding?
No, avoid medicinal amounts during pregnancy—the safety data advises against it, though food amounts of oregano are likely fine. If you're breastfeeding, there isn't enough information about supplement safety, so stick to food amounts and talk with your doctor or pharmacist before taking this as a medicine.
Does oregano oil actually work for colds or respiratory infections?
Right now, the evidence isn't established. We don't have enough reliable human trial data to say whether this supplement actually helps with upper respiratory infections, bronchitis, or asthma. It's been studied in the lab, but that's different from proving it works in real people.
What side effects should I watch for?
Most people just experience mild stomach upset. Allergic reactions are rare but can be serious—swelling of the lips or tongue, difficulty breathing, or a rash. If you're sensitive to oregano, thyme, basil, or other mint-family herbs, you're at higher risk and should avoid this product.
How is this different from cooking with oregano?
This is a concentrated oil extract, much stronger than the dried herb you sprinkle on pizza. Food amounts of oregano are considered safe, but this supplement hasn't been studied as thoroughly in higher doses, so we know less about long-term use.
Is this safe to take with my medications?
It depends on what you take. If you use blood thinners like warfarin or aspirin, or diabetes medications, oregano oil may interact and affect how they work. Use the medication checker on this page to look up your specific drugs, then talk with your doctor or pharmacist before you start.

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

Not sure if Oil of Oregano 150 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.

Oil of Oregano 150 mg label
Go deeper

The Full Monographs Behind Oil of Oregano 150 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

Oil of Oregano 150 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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