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Dietary supplement

Dong Quai 520 mg Ingredients & Drug Interactions

by NOW

Dong Quai 520 mg label
See full label image
Capsule Category: Botanical
Most serious interaction: Major
Clinical methodology reviewed by · Updated Sep 30, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Dong Quai 520 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: Major

Dong Quai 520 mg is a dietary supplement by NOW with 1 active ingredient. Its ingredients are commonly taken for menopause symptoms, menstrual cramps and irregular periods, premenstrual syndrome (pms).Based on those ingredients, 163 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Dong Quai. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Dong Quai 520 mg by NOW

Ask about any prescription or over-the-counter medication and we check it for interactions with Dong Quai 520 mg by NOW — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Dong Quai 520 mg by NOW

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 Oct 1, 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 supplement contains one active ingredient: dong quai (Angelica sinensis), a traditional Chinese herb used for various health purposes. The capsule also holds inactive ingredients — hypromellose, stearic acid, and silicon dioxide — which are standard binders and flow agents.

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 Dong Quai's own graded uses on its monograph.

Why this rating?
  • The label markets this product for: tonifying plant for female reproductive system.
  • We looked for evidence on: Dysmenorrhea, Menopausal symptoms, Premenstrual syndrome (PMS), Infertility, Menstrual irregularity, Women's hormonal balance.
  • The closest evidence on file: Dong Quai is rated "Insufficient Reliable Evidence To Rate" for Menopausal symptoms (Natural Medicines).
  • Also on file: Dong Quai is rated "Insufficient Reliable Evidence To Rate" for Premenstrual syndrome (PMS), Dysmenorrhea, Infertility.

The evidence for dong quai isn't established in our data. The product has been studied for iron deficiency anemia, osteoporosis, heart disease, migraines, and eczema, but we hold insufficient reliable evidence to rate it for any of these uses.

If you're considering it for a specific condition, that's a good question to bring to your doctor or pharmacist.

The evidence, ingredient by ingredient Dong Quai

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.

Dong quai is generally well tolerated orally; the most common side effects reported are burping and flatulence. However, it can increase your bleeding risk and may cause skin sensitivity to sunlight, so handle it with care if you're in the sun often.

The supplement may stimulate the uterus, so the safety data advises against use during pregnancy. There isn't enough safety information to know whether it's safe while breastfeeding, so talk with your doctor or pharmacist about that if it applies to you.

Rarely, occupational exposure to dong quai has triggered allergic asthma and rhinitis in sensitive individuals.

Side effects, ingredient by ingredient Dong Quai

Meds to double-check

Major interaction found
Known Interaction Concern · database check
Major identified

At least one ingredient has a documented Major-severity interaction. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Dong Quai.
  • The most serious interaction on file is rated Major.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs.
  • For scale: 163 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 Dong Quai 520 mg, double-check if you're on warfarin or any other blood thinner or antiplatelet drug — the bleeding risk is major with warfarin and moderate with others. Also confirm you're not using hormone replacement therapy with estrogens, since dong quai may interfere with it.

If you take any prescription medication, run it through the search tool on this page to be sure.

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. Major medication interactions have been identified, and safety information is well characterized.

Dong quai is worth considering if you're interested in traditional herbal support and you don't take blood thinners, antiplatelet drugs, or hormone replacement therapy. If you're on any of those medications — or any prescription at all — check with your doctor or pharmacist before starting, because the bleeding risk with blood thinners is serious.

Pregnancy and breastfeeding are reasons to skip it or at least confirm it's okay for 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 Jun 20, 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 Dong Quai 520 mg, straight from the product label.

Brand NOW
Barcode (UPC) 733739046550
Net contents 100 Veg Capsule(s)
Market status On market
Date entered into DSLD Jun 20, 2024
DSLD ID 314273
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Vegan, Vegetarian, Kosher, Women (not pregnant or lactating), Adult Female (18 - 50 Years), 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 Dong Quai 520 mg by NOW, 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:
2 Veg Capsule(s)
Maximum serving Sizes:
2 Veg Capsule(s)
Servings per container
50
UPC/BARCODE
733739046550
IngredientAmount% DV
Total Carbohydrates1 Gram(s)1%
Dong Quai1.04 Gram(s)--

Other ingredients: Hypromellose, Stearic Acid, Silicon Dioxide

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.
Suggested/Recommended/Usage/Directions

Suggested Usage: Take 2 capsules once daily, preferably with a meal.

Formula

Dong Quai (Angelica sinensis) Root has been highly valued for thousands of years by Asian herbalists. Dong Quai is widely known as a tonifying plant for the female reproductive system.

Female Support

Triangle K (Kosher)

FDA Disclaimer Statement

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

Precautions

Caution: For adults only.

Not for pregnant or nursing women. Consult physician if taking any medications (especially those that may affect bleeding) or have a medical condition.

Keep out of reach of children.

Not manufactured with yeast, wheat, gluten, soy, corn, milk, egg, fish, shellfish, tree nut or sesame ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.

Formulation

Natural color variation may occur in this product.

Non GMO Project Verified nongmoproject.org

Vegetarian/Vegan

Made and quality tested in the USA with globally sourced ingredients.

Not manufactured with yeast, wheat, gluten, soy, corn, milk, egg, fish, shellfish, tree nut or sesame ingredients.

Storage

Store in a cool, dry place after opening.

Seals/Symbols

Non GMO Project Verified nongmoproject.org

Triangle K (Kosher)

GMP Quality Assured

FDA Statement of Identity

A Dietary Supplement

General Statements

Botanicals/Herbs Family owned since 1968.

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

See for yourself

Dong Quai 520 mg by NOW label

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

Dong Quai 520 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 Dong Quai 520 mg by NOW

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

Serving size2 Veg Capsule(s) Dosage formCapsule Servings per container50 Amounts shown are per serving.

Dong Quai

Interacts with
163 drugs
1.04 Gram(s) per serving

Dong Quai is a traditional Chinese herb often called "female ginseng" and is mostly used for menstrual and menopausal complaints. High-quality scienti...

Dong Quai monograph & interactions

Other (inactive) ingredients: Hypromellose, Stearic Acid, Silicon Dioxide. These complete the product’s ingredient list but are not active constituents.

Interaction report

Dong Quai 520 mg by NOW Drug Interactions

Want to check YOUR meds against Dong Quai 520 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
163Drugs
2 Major 161 Moderate

Ingredients driving the most interactions

Dong Quai 163

Individual Drug Interactions

The ingredients in Dong Quai 520 mg interact with 163 drugs. Click any drug to see the details.

1 of the 1 ingredient in Dong Quai 520 mg interact with drugs. Each result below shows which ingredient is responsible. Dong Quai

Each ingredient & the kinds of drugs it affects

For each ingredient in Dong Quai 520 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.

Dong Quai3 drug types · 163 drugs

Warfarin (Coumadin)

Dong quai may increase the risk of bleeding when used with warfarin.
Case reports suggest that concomitant use of dong quai with warfarin can increase the anticoagulant effects of warfarin and increase the risk of bleeding. In one case, after 4 weeks of taking dong quai 565 mg once or twice daily, the international normalized ratio (INR) increased to 4.9. The INR normalized 4 weeks after discontinuation of dong quai.

Likelihood Probable Evidence D
Anticoagulant/Antiplatelet Drugs

Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Animal studies suggest that dong quai has antithrombin activity and inhibits platelet aggregation due to its coumarin components. Additionally, some case reports in humans suggest that dong quai can increase the anticoagulant effects of warfarin. However, clinical research in healthy adults shows that taking 1 gram of dong quai root daily for 3 weeks does not significantly inhibit platelet aggregation or cause bleeding. Until more is known, use dong quai with caution in patients taking antiplatelet/anticoagulant drugs.

Likelihood Possible Evidence D
Estrogens

Theoretically, dong quai may reduce the effects of estrogens.
Dong quai has estrogenic effects. Theoretically, concomitant use of large amounts of dong quai might interfere with hormone replacement therapy due to competition for estrogen receptors.

Likelihood Possible Evidence D
Dong Quai full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Dong Quai 520 mg, from the product label.

NOW

See all NOW products
Name
NOW FOODS
Street Address
395 S. Glen Ellyn Rd.
City
Bloomingdale
State
IL
ZipCode
60108
Web Address
nowfoods.com
Pharmacist Counseling Corner

Dong Quai 520 mg by NOW: Common Questions

Does Dong Quai 520 mg by NOW interact with any medications?
Yes. Based on its ingredients, Dong Quai 520 mg has a known interaction with 163 medications, including 2 rated major. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Dong Quai 520 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 dong quai safe to take during pregnancy?
No — the safety data rates it as possibly unsafe during pregnancy because it may stimulate the uterus and affect bleeding. Avoid it while pregnant, and talk with your doctor or pharmacist about your options.
Can I breastfeed while taking dong quai?
There isn't enough safety information to know either way. It's best avoided while breastfeeding unless your doctor or pharmacist confirms it's okay for your situation.
What side effects might I notice?
Most people tolerate it well. Burping and flatulence are the most common side effects. A less common but important caution: it may make your skin more sensitive to sunlight, so protect yourself if you're in the sun often.
Does dong quai actually work for the conditions it's marketed for?
We don't have reliable evidence yet. It's been studied for anemia, osteoporosis, heart disease, migraines, and eczema, but the evidence isn't strong enough to rate it for any of them.
Can I take dong quai if I'm on birth control or hormone replacement therapy?
Check with your doctor or pharmacist first. Dong quai has estrogenic effects and may theoretically interfere with how your hormones work, so it's worth confirming before you start.

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

Not sure if Dong Quai 520 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.

Dong Quai 520 mg label
Go deeper

The Full Monographs Behind Dong Quai 520 mg’s Ingredients

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

Herb & supplement monograph

Dong Quai

Interacts with 163 drugs

Dong Quai is a traditional Chinese herb often called "female ginseng" and is mostly used for menstrual and menopausal complaints. High-quality scientific evidence that it works for these use...

Read the full Dong Quai monograph →
Sources

Sources & How We Checked

Dong Quai 520 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 19 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.

Dong Quai 19 references
  1. Hirata JD, Swiersz LM, Zell B, et al. Does dong quai have estrogenic effects in postmenopausal women? A double-blind, placebo-controlled trial. Fertil Steril 1997;68:981-6. PubMed
  2. Page RL II, Lawrence JD. Potentiation of warfarin by dong quai. Pharmacotherapy 1999;19:870-6. PubMed
  3. Heck AM, DeWitt BA, Lukes AL. Potential interactions between alternative therapies and warfarin. Am J Health Syst Pharm 2000;57:1221-7. DOI
  4. Eagon PK, Elm MS, Hunter DS, et al. Medicinal herbs: modulation of estrogen action. Era of Hope Mtg, Dept Defense; Breast Cancer Res Prog, Atlanta, GA 2000;Jun 8-11.
  5. Dr. Duke's Phytochemical and Ethnobotanical Databases. Available at: http://www.ars-grin.gov/duke/.
  6. Amato P, Christophe S, Mellon PL. Estrogenic activity of herbs commonly used as remedies for menopausal symptoms. Menopause 2002;9:145-50. PubMed
  7. Shi M, Chang L, He G. [Stimulating action of Carthamus tinctorius L., Angelica sinensis (Oliv.) Diels and Leonurus sibiricus L. on the uterus]. Zhongguo Zhong Yao Za Zhi 1995;20:173-5, 192.
  8. Hoult JR, Paya M. Pharmacological and biochemical actions of simple coumarins: natural products with therapeutic potential. Gen Pharmacol 1996;27:713-22.. PubMed
  9. Cheong JL, Bucknall R. Retinal vein thrombosis associated with a herbal phytoestrogen preparation in a susceptible patient. Postgrad Med J 2005;81:266-7.. PubMed
  10. Chang CJ, Chiu JH, Tseng LM, et al. Modulation of HER2 expression by ferulic acid on human breast cancer MCF7 cells. Eur J Clin Invest 2006;36:588-96. PubMed
  11. Chuang CH, Doyle P, Wang JD, et al. Herbal medicines used during the first trimester and major congenital malformations: an analysis of data from a pregnancy cohort study. Drug Saf 2006;29:537-48. PubMed
  12. Lau CBS, Ho TCY, Chan TWL, Kim SCF. Use of dong quai (Angelica sinensis) to treat peri- and postmenopausal symptoms in women with breast cancer: is it appropriate? Menopause 2005;12:734-40.
  13. Ellis GR, Stephens MR. Untitled (photograph and a brief case report). BMJ 1999;319:650.
  14. Nambiar, S., Schwartz, R. H., and Constantino, A. Hypertension in mother and baby linked to ingestion of Chinese herbal medicine. West J Med 1999;171(3):152.
  15. Lee, S. K., Cho, H. K., Cho, S. H., Kim, S. S., Nahm, D. H., and Park, H. S. Occupational asthma and rhinitis caused by multiple herbal agents in a pharmacist. Ann.Allergy Asthma Immunol. 2001;86(4):469-474. PubMed
  16. Xu, J. and Li, G. [Observation on short-term effects of Angelica injection on chronic obstructive pulmonary disease patients with pulmonary hypertension]. Zhongguo Zhong Xi Yi Jie He Za Zhi 2000;20(3):187-189.
  17. Scott, G. N. and Elmer, G. W. Update on natural product--drug interactions. Am J Health Syst.Pharm 2-15-2002;59(4):339-347. PubMed
  18. Circosta, C., Pasquale, R. D., Palumbo, D. R., Samperi, S., and Occhiuto, F. Estrogenic activity of standardized extract of Angelica sinensis. Phytother.Res. 2006;20(8):665-669.
  19. Fung FY, Wong WH, Ang SK, et al. A randomized, double-blind, placebo- controlled study on the anti-haemostatic effects of Curcuma longa, Angelica sinensis and Panax ginseng. Phytomedicine. 2017;32:88-96. PubMed

See these in context on the Dong Quai 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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