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Dietary supplement

Horse Chestnut 250 mg Ingredients & Drug Interactions

by Nature's Way

Horse Chestnut 250 mg label
See full label image
Capsule 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 Horse Chestnut 250 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

Horse Chestnut 250 mg is a dietary supplement by Nature's Way with 2 active ingredients. Its ingredients are commonly taken for chronic venous insufficiency, leg swelling and heaviness, varicose veins.Based on those ingredients, 351 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Calendula, Horse Chestnut seed extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Horse Chestnut 250 mg by Nature's Way

Ask about any prescription or over-the-counter medication and we check it for interactions with Horse Chestnut 250 mg by Nature's Way — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Horse Chestnut 250 mg by Nature's Way

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 2 of its 2 active ingredients.
  • “Horse Chestnut seed extract” is listed as a grouped ingredient — the label gives one combined amount (250 mg) without saying how much of each component you get.

This product contains 2 active ingredients: horse chestnut seed extract and aescin (one of the compounds in horse chestnut), plus calendula. These are delivered in a capsule with inactive ingredients including hypromellose, cellulose, and magnesium stearate.

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 Calendula's own graded uses on its monograph.

Why this rating?
  • The label markets this product for: Promotes healthy leg veins and circulation.
  • We looked for evidence on: Chronic venous insufficiency (CVI), Hemorrhoids, Venous leg ulcers, Varicose veins, Leg swelling and heaviness.
  • The closest evidence on file: Calendula is rated "Insufficient Reliable Evidence To Rate" for Hemorrhoids (Natural Medicines).
  • Also on file: Calendula is rated "Insufficient Reliable Evidence To Rate" for Venous leg ulcers.

The evidence we hold does not establish how well calendula works for any of its listed uses — acne, bacterial vaginosis, burns, COPD, liver disease, and radiation dermatitis all carry insufficient reliable evidence to rate. Horse chestnut seed extract and aescin effectiveness ratings are not on file.

The evidence, ingredient by ingredient Horse Chestnut Calendula

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.

Calendula is generally well tolerated on the skin but can cause allergic reactions, especially in people sensitive to ragweed, chrysanthemums, marigolds, daisies, or other members of the Asteraceae/Compositae plant family. Orally, it can trigger allergic reactions; topically, it may cause eczematous reactions, hives, burning, itching, redness, or scaling.

Reliable safety information for oral use in pregnancy is lacking, so it's best avoided in pregnancy unless your doctor approves. Breastfeeding safety data for this product isn't on file.

Side effects, ingredient by ingredient Horse Chestnut Calendula

Meds to double-check

Minor interactions only
Known Interaction Concern · database check
Minor only

Only Minor-severity interactions are documented for these ingredients.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Calendula.
  • The most serious interaction on file is rated Minor.
  • For scale: 248 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, check whether you take CNS depressants (sedatives, sleep aids, anti-anxiety drugs) — calendula may add to their effects, though this appears unlikely. Also verify your other medications using the tool on this page, as we could not check aescin.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no established evidence rating for its marketed use. Only minor medication interactions are documented, and safety information is well characterized.

If you're considering this for a specific condition, talk with your pharmacist first — the evidence we hold doesn't show how well it works. If you take any CNS depressants or have a known allergy to ragweed or related plants, mention this product before you start.

Run your medications through the checker below.

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 Apr 24, 2025.

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 Horse Chestnut 250 mg, straight from the product label.

Brand Nature's Way
Barcode (UPC) 033674620007
Net contents 90 Vegan Capsule(s)
Market status On market
Date entered into DSLD Apr 24, 2025
DSLD ID 327983
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years), 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 Horse Chestnut 250 mg by Nature's Way, 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 Capsule(s)
Maximum serving Sizes:
1 Capsule(s)
Servings per container
90
UPC/BARCODE
033674620007
IngredientAmount% DV
Horse Chestnut seed extract250 mg--
Aescin50 mg--
Calendula100 mg--

Other ingredients: Hypromellose, Cellulose, Magnesium Stearate

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

Promotes healthy leg veins

Gluten free. No wheat, soy, dairy, gelatin. or artificial colors or flavors.

Vegan V Gelatin Free

Vegan V Gelatin Free

Premium extract Promotes healthy leg veins Plant powered

Non GMO Project Verified nongmoproject.org

General Statements

Made with the quality you trust

Explore more product at naturesway.com

Questions? 1-800-962-8873 / naturesways.com

Bottle made from 50% post-consumer recycled plastic

Formula

Horse chestnut seeds are used to support healthy circulation Contains horse chestnut seed extract standardized to 20% aescin (50 mg) per serving

250 mg of Horse Chestnut extract per serving

Precautions

Keep out of reach of children.

Safety sealed with inner seal. Do not use if seal is broken or missing.

Caution: Individuals with allergies to plants of the Asteraceae (Compositae) family, including ragweed, should use this product with caution.

If you are pregnant, nursing, or taking any medications, consult a healthcare professional before use.

Storage

Keep tightly closed. Store at room temperature. Avoid excessive heat and direct sunlight.

Brand IP Statement(s)

Copyright 2024 Nature's Way Brands, LLC

Seals/Symbols

Vegan V Gelatin Free

Non GMO Project Verified nongmoproject.org

FDA Disclaimer Statement

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

FDA Statement of Identity

Dietary Supplement

Suggested/Recommended/Usage/Directions

Recommendation: Adults take 1 capsule twice daily with food or water.

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

See for yourself

Horse Chestnut 250 mg by Nature's Way label

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

Horse Chestnut 250 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 Horse Chestnut 250 mg by Nature's Way

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

Serving size1 Capsule(s) Dosage formCapsule Servings per container90 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.

Horse Chestnut seed extract

Interacts with
122 drugs
250 mg per serving

Horse chestnut seed extract is most often used for chronic venous insufficiency, where standardized products may help reduce leg swelling, pain, and h...

Horse Chestnut seed extract monograph & interactions
  • › Aescin

Calendula

Interacts with
248 drugs
100 mg per serving

Calendula is a flowering plant whose petals are used mainly in skin creams, oils, and ointments to soothe minor irritation and support wound healing....

Calendula monograph & interactions

Other (inactive) ingredients: Hypromellose, Cellulose, Magnesium Stearate. These complete the product’s ingredient list but are not active constituents.

Interaction report

Horse Chestnut 250 mg by Nature's Way Drug Interactions

Want to check YOUR meds against Horse Chestnut 250 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
351Drugs
122 Moderate 229 Minor

Ingredients driving the most interactions

Calendula 248
Horse Chestnut seed extract 122

Individual Drug Interactions

The ingredients in Horse Chestnut 250 mg interact with 351 drugs. Click any drug to see the details.

2 of the 2 ingredients in Horse Chestnut 250 mg interact with drugs. Each result below shows which ingredient is responsible. Calendula Horse Chestnut seed extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Horse Chestnut 250 mg with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.

Calendula1 drug type · 248 drugs

Cns Depressants

Theoretically, calendula might have additive effects when used with CNS depressants, although this appears to be unlikely.
Although some animal research has suggested that a saponoside constituent in calendula may have sedative effects, calendula has been used for over 30 years without reports of sedation in humans.

Likelihood Unlikely Evidence D
Calendula full monograph & interactions

Horse Chestnut seed extract1 drug type · 122 drugs

Anticoagulant/Antiplatelet Drugs

Horse chestnut may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Horse chestnut contains the constituent esculin which has been shown to have antithrombotic effects. Therefore, horse chestnut might have antiplatelet effects. This has not been shown in humans.

Likelihood Possible Evidence D
Horse Chestnut seed extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Horse Chestnut 250 mg, from the product label.

Nature's Way

See all Nature's Way products
Name
Nature's Way Brands, LLC
City
Green Bay
State
WI
ZipCode
54311
Phone Number
1-800-962-8873
Web Address
naturesway.com
Pharmacist Counseling Corner

Horse Chestnut 250 mg by Nature's Way: Common Questions

Does Horse Chestnut 250 mg by Nature's Way interact with any medications?
Yes. Based on its ingredients, Horse Chestnut 250 mg has a known interaction with 351 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Horse Chestnut 250 mg 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.
Can I take this if I'm allergic to ragweed?
Calendula can trigger allergic reactions in people sensitive to ragweed, chrysanthemums, marigolds, daisies, and related plants. If you have a known allergy to any of these, avoid this product or talk with your pharmacist first.
Is it safe to take during pregnancy?
No — there isn't enough safety data for oral calendula in pregnancy, so it's best avoided unless your doctor approves. Talk with your pharmacist or doctor if you're pregnant or planning to be.
What are the side effects?
Calendula can cause allergic reactions (hives, eczematous rash). Topically, some people report burning, itching, redness, or scaling. Patch testing with calendula is recommended before use if you're sensitive to the Asteraceae plant family.
Will this help my acne, burns, or other condition?
The evidence we hold doesn't establish how well calendula works for acne, burns, or the other conditions listed — all are rated insufficient reliable evidence to rate. Your pharmacist can discuss whether this is right for you.
Does this product have fillers?
Yes. In addition to the active ingredients, it contains hypromellose, cellulose, and magnesium stearate as inactive ingredients.

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

Not sure if Horse Chestnut 250 mg is safe with your meds?

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Ask a pharmacist

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.

Horse Chestnut 250 mg label
Go deeper

The Full Monographs Behind Horse Chestnut 250 mg’s Ingredients

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

Herb & supplement monograph

Horse Chestnut

Interacts with 122 drugs

Horse chestnut seed extract is most often used for chronic venous insufficiency, where standardized products may help reduce leg swelling, pain, and heaviness. Raw, unprocessed horse chestnu...

Read the full Horse Chestnut monograph → Herb & supplement monograph

Calendula

Interacts with 248 drugs

Calendula is a flowering plant whose petals are used mainly in skin creams, oils, and ointments to soothe minor irritation and support wound healing. Some early research is promising for ski...

Read the full Calendula monograph →
Sources

Sources & How We Checked

Horse Chestnut 250 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 30 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.

Horse Chestnut 21 references
  1. Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Trans. S. Klein. Boston, MA: American Botanical Council, 1998.
  2. Ellenhorn MJ, et al. Ellenhorn's Medical Toxicology: Diagnoses and Treatment of Human Poisoning. 2nd ed. Baltimore, MD: Williams & Wilkins, 1997.
  3. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
  4. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  5. Greeske K, Pohlmann BK. Horse chestnut seed extract-an effective therapy principle in general practice. Drug therapy of chronic venous insufficiency. Fortschr Med 1996;114:196-200.
  6. Robbers JE, Tyler VE. Tyler's Herbs of Choice: The Therapeutic Use of Phytomedicinals. New York, NY: The Haworth Herbal Press, 1999.
  7. Takegoshi K, Tohyama T, Okuda K, et al. A case of Venoplant-induced hepatic injury. Gastroenterol Jpn 1986;21:62-5.
  8. Jaspersen-Schib R, Theus L, Guirguis-Oeschger M, et al. [Serious plant poisonings in Switzerland 1966-1994. Case analysis from the Swiss Toxicology Information Center]. Schweiz Med Wochenschr 1996;126:1085-98.
  9. Popp W, Horak F, Jager S, et al. Horse chestnut (Aesculus hippocastanum) pollen: a frequent cause of allergic sensitization in urban children. Allergy 1992;47:380-3.
  10. Diaz-Perales A, Collada C, Blanco C, et al. Cross-reactions in the latex-fruit syndrome: A relevant role of chitinases but not of complex asparagine-linked glycans. J Allergy Clin Immunol 1999;104:681-7. PubMed
  11. Blanco C, Diaz-Perales A, Collada C, et al. Class I chitinases as potential panallergens involved in the latex-fruit syndrome. J Allergy Clin Immunol 1999;103:507-13. PubMed
  12. Comaish JS, Kersey PJ. Contact dermatitis to extract of horse chestnut (esculin). Contact Dermatitis 1980;6:150-1. PubMed
  13. Pittler MH, Ernst E. Horse chestnut seed extract for chronic venous insufficiency (Cochrane Review). In: The Cochrane Library, Issue 3, 2004. Chichester, UK: John Wiley & Sons, Ltd. PubMed
  14. Ottillinger, B. and Greeske, K. Rational therapy of chronic venous insufficiency--chances and limits of the therapeutic use of horse-chestnut seeds extract. BMC.Cardiovasc.Disord. 2001;1(1):5. PubMed
  15. Pittler, M. H. and Ernst, E. Horse chestnut seed extract for chronic venous insufficiency. Cochrane.Database.Syst.Rev. 2004;(2):CD003230. PubMed
  16. Fang, Y., Zhao, L., Yan, F., Xia, X., Xu, D., and Cui, X. Escin improves sperm quality in male patients with varicocele-associated infertility. Phytomedicine. 2010;17(3-4):192-196. PubMed
  17. De Smet, P. A., Van den Eertwegh, A. J., Lesterhuis, W., and Stricker, B. H. Hepatotoxicity associated with herbal tablets. BMJ 7-13-1996;313(7049):92.
  18. Rehn, D., Unkauf, M., Klein, P., Jost, V., and Lucker, P. W. Comparative clinical efficacy and tolerability of oxerutins and horse chestnut extract in patients with chronic venous insufficiency. Arzneimittelforschung 1996;46(5):483-487.
  19. Edem E, Kahyaoglu B, Çakar MA. Acute Effusive Pericarditis due to Horse Chestnut Consumption. Am J Case Rep. 2016;17:305-8. PubMed
  20. Costa Santos D, Lérias G, Madruga I. Drug-induced Liver Injury Due to a Horse Chestnut Dietary Supplement. Eur J Case Rep Intern Med 2021;8(3):002389. PubMed
  21. Yi HY, Lee JY. Poisoning due to consumption of horse chestnut seed. Clin Exp Emerg Med 2021;8(4):333-335. PubMed

See these in context on the Horse Chestnut monograph →

Calendula 9 references
  1. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
  2. Reider N, Komericki P, Hausen BM, et al. The seamy side of natural medicines: contact sensitization to arnica (Arnica montana L.) and marigold (Calendula officinalis L.). Contact Dermatitis 2001;45:269-72..
  3. Gol'dman II. [Anaphylactic shock after gargling with an infusion of Calendula]. Klin Med (Mosk) 1974;52:142-3.
  4. Paulsen E. Contact sensitization from Compositae-containing herbal remedies and cosmetics. Contact Dermatitis 2002;47:189-98. PubMed
  5. Bojadjiev C. On the sedative and hypotensive effect of preparations from the plant Calendula officinalis. Nauch Trud Visshi Med Inst Sof 1964;43:15-20.
  6. Samochowiec L. Pharmacological study of saponosides from Aralia mandshurica Rupr. et Maxim and Calendula officinalis L. Herba Pol. 1983;29:151-155.
  7. Madisetti M, Kelechi TJ, Mueller M, Amella EJ, Prentice MA. Feasibility, acceptability, and tolerability of RGN107 in the palliative wound care management of chronic wound symptoms. J Wound Care. 2017;26(Sup1):S25-S34. PubMed
  8. Final Assessment report on Calendula officinalis L., flos. European Medicines Agency: Committee on Herbal Medicinal Products (HMPC). 2018. EMA/HMPC/603409/2017. Available at: https://www.ema.europa.eu/en/documents/herbal-report/final-assessment-report-cal
  9. Puaratanaarunkon T, Washrawirul C, Chuenboonngarm N, Noppakun N, Asawanonda P, Kumtornrut C. Efficacy and safety of a facial serum containing snail secretion filtrate, Calendula officinalis, and Glycyrrhiza glaba root extract in the treatment of maskne: A

See these in context on the Calendula 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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