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Dietary supplement

Brown Mustard Ingredients & Drug Interactions

by Herbal Terra

Brown Mustard label
See full label image
Liquid 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 Brown Mustard 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

Brown Mustard is a dietary supplement by Herbal Terra with 1 active ingredient. Its ingredients are commonly taken for culinary spice, muscle and joint aches (topical plaster), chest congestion (chest rub or poultice).Based on those ingredients, 86 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are certified organic Brown Mustard (Brassica nigra) dried seed liquid extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against Brown Mustard by Herbal Terra

Ask about any prescription or over-the-counter medication and we check it for interactions with Brown Mustard by Herbal Terra — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Brown Mustard by Herbal Terra

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.

Brown Mustard by Herbal Terra is a liquid extract made from one active ingredient: certified organic brown mustard (black mustard) dried seed. The extract is suspended in menstruum, which is the liquid used to pull out and preserve the active compounds from the seeds.

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 Black Mustard product and its label doesn't state a use — see Black Mustard'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 brown mustard isn't established in the data we hold. It's been studied for common cold, acute pain, and osteoarthritis, but the available research is too limited or unreliable to say whether it actually works for any of those uses.

If you're considering it for a specific reason, talk with your pharmacist about what the current evidence shows.

The evidence, ingredient by ingredient Black Mustard

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.

Brown mustard is generally well tolerated in food amounts—we eat mustard as a spice all the time. But this product is a concentrated extract, which is a different story.

The safety data on medicinal or concentrated amounts is thin, so caution is warranted. Very large amounts taken by mouth can cause vomiting, stomach pain, and diarrhea.

There's also a risk of breathing difficulty with very large doses. Applied to the skin, the oil or powder can irritate or even burn skin, especially with prolonged contact.

Because this product is concentrated, it carries more risk than ordinary mustard condiment. This extract is rated Likely Unsafe in pregnancy, so it's not recommended if you're pregnant.

There's no safety information on file for use while breastfeeding—talk with your doctor or pharmacist about whether it's right for you.

Side effects, ingredient by ingredient Black Mustard

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 — Black Mustard.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: diabetes medications.
  • For scale: 86 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.

If you take diabetes medication (such as insulin, metformin, or a sulfonylurea), talk with your pharmacist or doctor before using this product. Black mustard seed can theoretically lower blood sugar and increase the risk of hypoglycemia (low blood sugar).

A blood sugar check with your doctor may be wise if you decide to use them together.

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.

Brown mustard extract is a single-ingredient supplement with limited evidence of effectiveness. If you take diabetes medication, this is the main interaction to watch for.

Even if you don't, the concentrated form carries more risk of stomach upset and skin irritation than regular mustard spice. Check with your pharmacist before starting, especially if you're pregnant or taking any blood sugar medication.

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 Sep 25, 2020.

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 Brown Mustard, straight from the product label.

Brand Herbal Terra
Barcode (UPC) 617503344007
Net contents 4 Fluid Ounce(s); 120 mL
Market status On market
Date entered into DSLD Sep 25, 2020
DSLD ID 235462
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Organic, 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 Brown Mustard by Herbal Terra, 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 mL
Maximum serving Sizes:
1 mL
Servings per container
120
UPC/BARCODE
617503344007
IngredientAmount% DV
certified organic Brown Mustard (Brassica nigra) dried seed liquid extract970 mg--

Other ingredients: Menstruum

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

Origin of plant material: India.

Manufactured in the USA in an FDA registered facility

Alcohol free

Dried herb/menstruum ratio: 1:3 Expertly extracted Laboratory tested 330 mg/1 mL Premium product Alcohol-free liquid herbal extract

Non GMO

No artificial ingredients, GMO, gluten, color additives, fillers, preservatives or binders. Natural Gluten Free

Suggested/Recommended/Usage/Directions

Direction Shake well before use. Adults take up to 30 drops (1 mL, one full squeeze of the dropper bulb) in 3-4 fl. oz of juice or water up to 4 times a day. We recommend to seek expert medical advice before taking this or any other herbal supplements.

FDA Disclaimer Statement

Notice This product has not been evaluated by the FDA and is not intended to diagnose, treat, cure, or prevent any disease.

Precautions

Caution May have contraindications.

Do not use if you are allergic to any ingredients.

Consult a physician before using during pregnancy, if nursing, or if you are on any medications.

Keep out of the reach of children.

Storage

Store in a cool, dry, dark place.

Formula

Brassica nigra

FDA Statement of Identity

Herbal Supplement

Seals/Symbols

Made in USA Made in an FDA registered facility Natural Gluten Free

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

See for yourself

Brown Mustard by Herbal Terra label

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

Brown Mustard 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 Brown Mustard by Herbal Terra

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

Serving size1 mL Dosage formLiquid Servings per container120 Amounts shown are per serving.

Certified organic Brown Mustard (Brassica nigra) dried seed liquid extract

Interacts with
86 drugs
970 mg per serving

Black mustard is best known as a pungent culinary spice and a traditional topical remedy for muscle aches and congestion. Solid human evidence for any...

Certified organic Brown Mustard (Brassica nigra) dried seed liquid extract monograph & interactions

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

Interaction report

Brown Mustard by Herbal Terra Drug Interactions

Want to check YOUR meds against Brown Mustard?

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
86Drugs
86 Moderate

Ingredients driving the most interactions

certified organic Brown Mustard (Brassica nigra) dried seed liquid extract 86

Individual Drug Interactions

The ingredients in Brown Mustard interact with 86 drugs. Click any drug to see the details.

1 of the 1 ingredient in Brown Mustard interact with drugs. Each result below shows which ingredient is responsible. certified organic Brown Mustard (Brassica nigra) dried seed liquid extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Brown Mustard 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.

certified organic Brown Mustard (Brassica nigra) dried seed liquid extract1 drug type · 86 drugs

Antidiabetes Drugs

Theoretically, black mustard seed might increase the risk of hypoglycemia when used with antidiabetes drugs.
Animal research shows that some extracts of black mustard seeds can reduce blood glucose levels, possibly by regulating the release of insulin and the metabolism of glucose.

Likelihood Possible Evidence D
certified organic Brown Mustard (Brassica nigra) dried seed liquid extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Brown Mustard, from the product label.

Herbal Terra

See all Herbal Terra products
Name
Herbal Terra
Pharmacist Counseling Corner

Brown Mustard by Herbal Terra: Common Questions

Does Brown Mustard by Herbal Terra interact with any medications?
Yes. Based on its ingredients, Brown Mustard has a known interaction with 86 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Brown Mustard 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 brown mustard seed safe to take if I'm pregnant?
No. This extract is rated Likely Unsafe in pregnancy and is not recommended. If you're pregnant or planning to become pregnant, talk with your doctor before using it.
What does black mustard seed do?
It's been studied for common cold, acute pain, and osteoarthritis, but the evidence is too limited to say whether it really works for any of those. Animal research suggests it may lower blood sugar, which is why it interacts with diabetes medications.
Is this safe to take in large amounts?
No. Very large amounts can cause stomach upset—vomiting, pain, and diarrhea—and in extreme cases, breathing difficulty. The safety data on medicinal amounts is sparse, so stick to regular food-spice amounts if you use it at all.
Can I apply this to my skin?
The oil and powder can irritate or burn skin, especially if left on for a long time. Topical use should be brief and cautious.
Is there anything else in this besides mustard seed?
Yes—menstruum, which is the liquid solvent that extracts and preserves the active compounds from the seeds. That's it for the formula.

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.

Brown Mustard label
Go deeper

The Full Monographs Behind Brown Mustard’s Ingredients

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

Herb & supplement monograph

Black Mustard

Interacts with 86 drugs

Black mustard is best known as a pungent culinary spice and a traditional topical remedy for muscle aches and congestion. Solid human evidence for any specific health benefit is limited, and...

Read the full Black Mustard monograph →
Sources

Sources & How We Checked

Brown Mustard'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.

Black Mustard 8 references
  1. The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
  2. Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Food, Drugs and Cosmetics. 2nd ed. New York, NY: John Wiley & Sons, 1996.
  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. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
  5. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  6. Anand, P., Murali, K. Y., Tandon, V., Chandra, R., and Murthy, P. S. Preliminary studies on antihyperglycemic effect of aqueous extract of Brassica nigra (L.) Koch in streptozotocin induced diabetic rats. Indian J Exp.Biol 2007;45(8):696-701.
  7. Anand, P., Murali, Y. K., Tandon, V., Murthy, P. S., and Chandra, R. Insulinotropic effect of aqueous extract of Brassica nigra improves glucose homeostasis in streptozotocin induced diabetic rats. Exp.Clin.Endocrinol.Diabetes 2009;117(6):251-256.
  8. Gulbransen, G. and Esernio-Jenssen, D. Aspiration of black mustard. J Toxicol.Clin.Toxicol. 1998;36(6):591-593. PubMed

See these in context on the Black Mustard 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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