Major interaction on record — check this product against your medications before combining. Based on 7 of 14 ingredients. Check your meds →
Dietary supplement

Cramp Bark Plus Ingredients & Drug Interactions

by Health Concerns

Cramp Bark Plus label
See full label image
Tablet Or Pill Category: Botanical
Most serious interaction: Major
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Cramp Bark Plus 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

Cramp Bark Plus is a dietary supplement by Health Concerns with 14 active ingredients. Its ingredients are commonly taken for menopause symptoms, menstrual cramps and irregular periods, premenstrual syndrome (pms).Based on those ingredients, 1,177 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Red Peony, Zedoaria, Cinnamon. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against Cramp Bark Plus by Health Concerns

Ask about any prescription or over-the-counter medication and we check it for interactions with Cramp Bark Plus by Health Concerns — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Cramp Bark Plus by Health Concerns

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

Low disclosure
Ingredient Transparency · database check
Low

Most active ingredients don't disclose an individual amount — you can't tell how much of each you're getting.

Why this rating?
  • The label discloses an exact amount for 0 of its 14 active ingredients.
  • “Proprietary Blend” is a proprietary blend — the label gives one combined amount (750 mg) without saying how much of each component you get.

Cramp Bark Plus contains 14 ingredients, most of them traditional Chinese herbs. The active components include Dong Quai (Tang Kuei), Red Peony, Motherwort (Leonurus), Cramp Bark, Cassia Cinnamon, Zedoary, and several others — Vladimiria Souliei, Moutan, Achyranthes, Cyperus, Carthamus, Corydalis, Sparganium, and Persica — all combined in a proprietary blend.

These herbs are traditionally used to address menstrual and muscular discomfort, though the scientific evidence for their effectiveness is limited. The tablet also contains inactive ingredients — vegetable gum, silicon dioxide, stearic acid, and cellulose — as binders and fillers to hold the formula together.

Does it work?

Insufficient evidence
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
Insufficient

There isn't enough reliable clinical evidence to rate this product's ingredients for its stated purpose.

Why this rating?
  • The label markets this product for: Support menstrual comfort and muscle cramps.
  • We looked for evidence on: Dysmenorrhea, Muscle cramps, Pregnancy-related leg cramps, Menopausal symptoms, Menstrual irregularities, Muscle spasms — and 1 related terms.
  • The closest evidence on file: Peony is rated "Insufficient Reliable Evidence To Rate" for Muscle cramps (Natural Medicines).
  • Also on file: Peony is rated "Insufficient Reliable Evidence To Rate" for Dysmenorrhea.
  • Also on file: Motherwort is rated "Insufficient Reliable Evidence To Rate" for Menopausal symptoms, Dysmenorrhea.

The evidence for Cramp Bark Plus is not established in the data we hold. The individual herbs in this formula — including Cramp Bark itself, Motherwort, and Cassia Cinnamon — have been tested for conditions like muscle cramps, dysmenorrhea (painful periods), and other uses, but the studies show insufficient reliable evidence to rate them effective.

That doesn't mean they don't work; it means high-quality clinical trials supporting their use are lacking or inconclusive. Talk to your pharmacist about whether this product aligns with what you're hoping to address.

The evidence, ingredient by ingredient Dong Quai Peony Adrue Cassia Cinnamon Cramp Bark Motherwort Zedoary

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 4 of the 7 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 7 of 7.
  • General safety write-ups exist for 7 of 7.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

The herbs in this product are generally well tolerated in the short term, but several carry important cautions. Dong Quai may increase bleeding risk and cause skin sensitivity to sunlight.

Red Peony and Motherwort are traditionally used to affect the uterus and menstrual cycle, so they're not recommended during pregnancy or breastfeeding — the safety data simply aren't robust enough. Cassia Cinnamon in food amounts is fine, but the supplement doses here may contain higher levels of coumarin, a compound that can stress the liver if taken in large amounts over time.

Common side effects from these herbs, when they occur, include digestive upset (nausea, diarrhea, abdominal discomfort), headache, or skin reactions in sensitive individuals.

Side effects, ingredient by ingredient Dong Quai Peony Adrue Cassia Cinnamon Cramp Bark Motherwort Zedoary

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?
  • 6 of the 7 matched ingredients can interact with medications — Peony, Adrue, Motherwort, Zedoary, Dong Quai, among others.
  • The most serious interaction on file is rated Major.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; diabetes medications.
  • For scale: 1,178 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 Cramp Bark Plus, double-check if you take blood thinners (warfarin, aspirin, clopidogrel) — Dong Quai carries a Major-severity risk, and Peony and Motherwort carry Moderate risks of increased bleeding. If you take estrogen-based hormone replacement therapy or hormonal contraceptives, Dong Quai and Red Peony may interfere with their effectiveness.

Mention diabetes medications — Cassia Cinnamon may have additive blood-sugar-lowering effects. If you take psychiatric medications like clozapine or certain cancer drugs that depend on liver metabolism, Red Peony and Zedoary may increase their levels.

No interactions are documented for Cramp Bark itself among the ingredients we could check.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFormula with limited ingredient disclosure with insufficient evidence for its stated purpose. Major medication interactions have been identified, and safety information is well characterized.

Cramp Bark Plus is a multi-herb formula with a long history in traditional medicine, but solid evidence for its effectiveness is lacking. If you take blood thinners, diabetes medications, hormone-based contraceptives, or certain psychiatric drugs, you'll need to check your specific medications before starting — several ingredients here may interact.

If you're pregnant or breastfeeding, talk with your pharmacist or doctor first, as a few of these herbs are not recommended at those times. Use the medication checker below to verify your prescriptions.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 8 of 14 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Apr 25, 2017.

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 Cramp Bark Plus, straight from the product label.

Brand Health Concerns
Net contents 90 Tablet(s)
Market status On market
Date entered into DSLD Apr 25, 2017
DSLD ID 72832
Product type Botanical
Supplement form Tablet Or Pill
Dietary claims / uses All Other
Intended target group(s) Adult (18 - 50 Years)
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 Cramp Bark Plus by Health Concerns, 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:
3 Tablet(s)
Maximum serving Sizes:
3 Tablet(s)
Servings per container
30
IngredientAmount% DV
Proprietary Blend750 mg--
Vladimiria Souliei0 NP--
Tang Kuei0 NP--
Red Peony0 NP--
Moutan0 NP--
Achyranthes0 NP--
Cyperus0 NP--
Carthamus0 NP--
Cinnamon0 NP--
Crampbark0 NP--
Leonurus0 NP--
Corydalis0 NP--
Zedoaria0 NP--
Sparganium0 NP--
Persica0 NP--

Other ingredients: Vegetable Gum, Silicon Dioxide, Stearic Acid, Cellulose

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 Use: Three tablets 3 times per day between meals.

Precautions

Notice: This product is not intended for use by pregnant women.

Brand IP Statement(s)

Chinese traditional formulas

Combining modern research and ancient wisdom

General Statements

Modified Tong Jin Wan

Made in the U.S.A.

FDA Statement of Identity

Herbal Supplement

Formula

Pinyin/Latin: Viburnum opulis, Gui Zhi, Biu Xi, Chi Shao, Mu Dan Pi, Yi Mu Cao, Yan Hu Suo, Dang Gui, Tao Ren, E Zhu, San Leng, Xiang Fu, Mu Xiang, Hong Hua.

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

See for yourself

Cramp Bark Plus by Health Concerns label

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

Cramp Bark Plus 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 Cramp Bark Plus by Health Concerns

These are the 14 active ingredients this product is made of. Select any to open its full monograph.

Serving size3 Tablet(s) Dosage formTablet Or Pill Servings per container30 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.

Proprietary Blend

750 mg per serving

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

Interaction report

Cramp Bark Plus by Health Concerns Drug Interactions

Want to check YOUR meds against Cramp Bark Plus?

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
1,177Drugs
2 Major 1,175 Moderate

Ingredients driving the most interactions

Red Peony 811
Zedoaria 643
Cinnamon 442
Cyperus 256
Leonurus 248

Individual Drug Interactions

The ingredients in Cramp Bark Plus interact with 1,177 drugs. Click any drug to see the details.

6 of the 14 ingredients in Cramp Bark Plus interact with drugs. Each result below shows which ingredient is responsible. Red Peony Zedoaria Cinnamon Cyperus Leonurus Tang Kuei

Each ingredient & the kinds of drugs it affects

For each ingredient in Cramp Bark Plus 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.

Red Peony7 drug types · 811 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, combining peony with anticoagulant or antiplatelet drugs might increase the risk of bleeding.
In vitro research suggests that peony might have antiplatelet, anticoagulant, and antithrombotic effects.

Likelihood Possible Evidence D
Clozapine (Clozaril)

Theoretically, peony might increase the levels and clinical effects of clozapine.
In vitro research shows that peony suppresses the metabolism of clozapine via weak-to-moderate inhibitory effects on cytochromes P450 (CYP) 1A2 and CYP3A4. This effect has not been reported in humans.

Likelihood Possible Evidence D
Contraceptive Drugs

Theoretically, peony might interfere with contraceptive drugs due to competition for estrogen receptors.
In vitro and animal research shows that peony extract has estrogenic activity. Concomitant use might also increase the risk for estrogen-related adverse effects.

Likelihood Possible Evidence D
Cytochrome P450 1A2 (Cyp1A2) Substrates

Theoretically, use of peony may increase the levels and clinical effects of drugs metabolized by CYP1A2.
In vitro research shows that peony suppresses the metabolism of clozapine via weak-to-moderate inhibitory effects on CYP1A2 and CYP3A4. This effect has not been reported in humans.

Likelihood Possible Evidence D
Cytochrome P450 3A4 (Cyp3A4) Substrates

Theoretically, use of peony may increase the levels and clinical effects of drugs metabolized by CYP3A4.
In vitro research shows that peony suppresses the metabolism of clozapine via weak-to-moderate inhibitory effects on CYP1A2 and CYP3A4. This effect has not been reported in humans.

Likelihood Possible Evidence D
Estrogens

Theoretically, concomitant use of large amounts of peony might interfere with hormone replacement therapy and/or increase the risk for estrogen-related adverse effects.
In vitro and animal research shows that peony extract has estrogenic activity. Theoretically, peony might compete for estrogen receptors and/or cause additive estrogenic effects.

Likelihood Possible Evidence D
Phenytoin (Dilantin)

Theoretically, peony might reduce the levels and clinical effects of phenytoin.
Animal research shows that taking peony root reduces levels of phenytoin. Some researchers suggest that peony root might affect cytochrome P450 (CYP) 2C9, which metabolizes phenytoin. However, preliminary research in humans shows that peony root does not alter levels of losartan (Cozaar), which is also metabolized by CYP2C9.

Likelihood Probable Evidence D
Red Peony full monograph & interactions

Zedoaria1 drug type · 643 drugs

Cytochrome P450 3A4 (Cyp3A4) Substrates

Theoretically, zedoary might increase levels of drugs metabolized by CYP3A4.
In-vitro research shows that a methanol extract of zedoary strongly inhibits the CYP3A4 metabolism of the tyrosine kinase inhibitors lapatinib and sorafenib, and to a lesser extent, gefitinib.

Likelihood Possible Evidence D
Zedoaria full monograph & interactions

Cinnamon2 drug types · 442 drugs

Antidiabetes Drugs

Theoretically, cassia cinnamon may have additive effects with antidiabetes drugs.
Cassia cinnamon may lower blood glucose levels, and have additive effects in patients treated with antidiabetic agents. Dose adjustments to diabetes medications might be necessary.

Likelihood Possible Evidence B
Hepatotoxic Drugs

Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
There is some concern that ingesting large amounts of cassia cinnamon for an extended duration might cause hepatotoxicity in some people. Cassia cinnamon contains coumarin, which can cause hepatotoxicity in animal models. In humans, very high doses of coumarin from 50-7000 mg/day can result in hepatotoxicity that resolves when coumarin use is discontinued. Lower amounts might also cause liver problems in sensitive people, such as those with liver disease or those taking potentially hepatotoxic agents.

Likelihood Possible Evidence D
Cinnamon full monograph & interactions

Cyperus3 drug types · 256 drugs

Barbiturates

Animal research suggests that taking adrue in combination with sodium thiopental increases total sleep time three-fold compared to the effects of sodium thiopental alone. Theoretically, concomitant use of adrue and barbiturates might increase the risk of drowsiness and motor reflex depression. Some barbiturates include amobarbital (Amytal), butabarbital (Butisol), mephobarbital (Mebaral), pentobarbital (Nembutal), phenobarbital (Luminal), secobarbital (Seconal), and others.

Likelihood Possible Evidence D
Benzodiazepines

Animal research suggests that taking adrue in combination with diazepam increases total sleep time four-fold compared to the effects of diazepam alone. Theoretically, concomitant use adrue and benzodiazepines might increase the risk of drowsiness and motor reflex depression. Some benzodiazepines include clonazepam (Klonopin), diazepam (Valium), lorazepam (Ativan), and others.

Likelihood Possible Evidence D
Cns Depressants

Animal research suggests that taking adrue in combination with sodium thiopental or diazepam increases total sleep time up to four-fold compared to the effects of the drugs alone. Theoretically, concomitant use of adrue with CNS depressants might cause additive sedation. Some CNS depressants include benzodiazepines, such as diazepam (Valium), alprazolam (Xanax), triazolam (Halcion), and estazolam (ProSom); barbiturates, such as mephobarbital (Mebaral), phenobarbital (Luminal Sodium), and pentobarbital sodium (Nembutal); zolpidem (Ambien); and others.

Likelihood Possible Evidence D
Cyperus full monograph & interactions

Leonurus1 drug type · 248 drugs

Cns Depressants

Theoretically, taking motherwort concomitantly with other CNS depressants may increase the risk of sedation.
Motherwort has been reported to cause CNS depression and sedation.

Likelihood Possible Evidence D
Leonurus full monograph & interactions

Tang Kuei3 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
Tang Kuei full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Cramp Bark Plus, from the product label.

Health Concerns

See all Health Concerns products
Name
Health Concerns
Street Address
8001 Capwell Drive
City
Oakland
State
CA
ZipCode
94621
Phone Number
(800) 233-9355
Web Address
www.healthconcerns.com/pro
Pharmacist Counseling Corner

Cramp Bark Plus by Health Concerns: Common Questions

Does Cramp Bark Plus by Health Concerns interact with any medications?
Yes. Based on its ingredients, Cramp Bark Plus has a known interaction with 1,177 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?
Cramp Bark Plus contains 14 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 while pregnant or breastfeeding?
Several herbs in this formula — Dong Quai, Red Peony, Motherwort, and Zedoary — are not recommended during pregnancy or breastfeeding because safety data are too limited or because they're traditionally thought to affect the uterus. Talk with your pharmacist or doctor before using this product if you're pregnant or nursing.
What is Cramp Bark, and what does it do?
Cramp Bark is one of 14 herbs in this blend. It's traditionally used to ease muscle cramps and menstrual discomfort, but the evidence showing it's effective is insufficient. When we checked it against our interaction database, no drug interactions were documented.
Will this help with period cramps?
This product combines herbs traditionally used for menstrual and muscle discomfort, including Motherwort, Red Peony, and Cramp Bark. However, the scientific evidence showing these ingredients are effective for period cramps (dysmenorrhea) is not established in our data. Talk to your pharmacist about what the research actually supports.
Are there any common side effects?
Most people tolerate these herbs without problems, but some users report mild digestive upset — nausea, diarrhea, or abdominal discomfort — especially with Red Peony. Dong Quai may cause skin sensitivity to sunlight. Allergic reactions or contact dermatitis are rare but possible.
Does Cassia Cinnamon in this product lower blood sugar?
Cassia Cinnamon is one ingredient in the proprietary blend and may have blood-sugar-lowering effects. If you take diabetes medications, this product could add to that effect, so check with your pharmacist first.
Why can't I find interaction data for all the herbs?
Eight of the fourteen ingredients — Vladimiria Souliei, Moutan, Achyranthes, Cyperus, Carthamus, Corydalis, Sparganium, and Persica — don't have interaction monographs on file with us yet, so we can't check them against medications. The others have been reviewed and their interactions documented.

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.

Cramp Bark Plus label
Go deeper

The Full Monographs Behind Cramp Bark Plus’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 → Herb & supplement monograph

Peony

Interacts with 811 drugs

Peony root is a traditional Chinese medicine herb often used for menstrual problems, cramps, and inflammation, frequently as part of combination formulas. Human evidence for most uses is lim...

Read the full Peony monograph → Herb & supplement monograph

Adrue

Interacts with 256 drugs

Adrue (Cyperus articulatus) is a sedge whose rhizome has long been used in traditional medicine for nausea and other stomach complaints, and as a mild calming agent. Solid human studies are...

Read the full Adrue monograph → Herb & supplement monograph

Cassia Cinnamon

Interacts with 442 drugs

Cassia cinnamon is the common, inexpensive cinnamon used in cooking, and it is also taken as a supplement, most often for blood sugar support. The evidence for its health benefits is mixed a...

Read the full Cassia Cinnamon monograph → Herb & supplement monograph

Cramp Bark

Cramp Bark is the dried bark of Viburnum opulus, traditionally used to ease muscle and menstrual cramps. Modern, high-quality human studies are very limited, so its effectiveness is not well...

Read the full Cramp Bark monograph → Herb & supplement monograph

Motherwort

Interacts with 248 drugs

Motherwort is a traditional herb in the mint family long used for anxiety, heart palpitations, and women's reproductive complaints, but solid human evidence is very limited. It should be avo...

Read the full Motherwort monograph → Herb & supplement monograph

Zedoary

Interacts with 643 drugs

Zedoary is a ginger-family root used in traditional Asian and Indian medicine, mostly for digestion and as a spice. Scientific evidence in humans is very limited, so its benefits are not wel...

Read the full Zedoary monograph →
Sources

Sources & How We Checked

Cramp Bark Plus'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 66 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 →

Peony 15 references
  1. Chen LC, Chou MH, Lin MF, Yang LL. Effects of Paeoniae Radix, a traditional Chinese medicine, on the pharmacokinetics of phenytoin. J Clin Pharm Ther 2001;26:271-8. PubMed
  2. Guo TL, Zhou XW. [Clinical observations on the treatment of the gestational hypertension syndrome with Angelica and Paeonia powder]. Zhong Xi Yi Jie He Za Zhi 1986;6:714-6, 707.
  3. Xie HJ, Yasar U, Sandberg M, Rane A. Paeoniae Radix, a traditional Chinese medicine, and CYP2C9 activity. J Clin Pharm Ther 2002;27:229-30. . PubMed
  4. Harada M, Suzuki M, Ozaki Y. Effect of Japanese Angelica root and peony root on uterine contraction in the rabbit in situ. J Pharmacobiodyn 1984;7:304-11. PubMed
  5. Anon. Monograph. Peony (Paeonia spp). Alt Med Rev 2001;6:495-9.
  6. Bruynzeel DP. Contact Dermatitis Due to Paeonia (Peony). Contact Dermatitis 1989; 20:152-3..
  7. Bian, X., Xu, Y., Zhu, L., Gao, P., Liu, X., Liu, S., Qian, M., Gai, M., Yang, J., and Wu, Y. Prevention of maternal-fetal blood group incompatibility with traditional Chinese herbal medicine. Chin Med J (Engl.) 1998;111(7):585-587.
  8. Wong, A. L. and Chan, T. Y. Interaction between warfarin and the herbal product quilinggao. Ann Pharmacother 2003;37(6):836-838.
  9. Cai Y, Yuan Q, Xu K, et al. Assessment of the therapeutic effect of total glycosides of peony for juvenile idiopathic arthritis: a systematic review and meta-analysis. Evid Based Complement Alternat Med 2016;2016:8292486.
  10. Koo YK, Kim JM, Koo JY, et al. Platelet anti-aggregatory and blood anti-coagulant effects of compounds isolated from Paeonia lactiflora and Paeonia suffruticosa. Pharmazie 2010;65(8):624-8.
  11. Wang W, Tian DD, Zheng B, et al. Peony-glycyrrhiza decoction, an herbal preparation, inhibits clozapine metabolism via cytochrome P450s, but not flavin-containing monooxygenase in in vitro models. Drug Metab Dispos 2015;43(7):1147-53. PubMed
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Adrue 1 reference
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Cassia Cinnamon 20 references
  1. Electronic Code of Federal Regulations. Title 21. Part 182 -- Substances Generally Recognized As Safe. Available at: https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?CFRPart=182
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  5. Press release. Cinnamon capsules to reduce blood sugar are medicinal products! Efficacy has not been scientifically proven - some products contain high levels of coumarin. Federal Institute of Risk Assessment (BfM), Germany, November 11, 2006. Available a
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  8. Akilen, R., Tsiami, A., Devendra, D., and Robinson, N. Glycated haemoglobin and blood pressure-lowering effect of cinnamon in multi-ethnic Type 2 diabetic patients in the UK: a randomized, placebo-controlled, double-blind clinical trial. Diabet.Med. 2010; PubMed
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  10. Choi, J., Lee, K. T., Ka, H., Jung, W. T., Jung, H. J., and Park, H. J. Constituents of the essential oil of the Cinnamomum cassia stem bark and the biological properties. Arch Pharm Res 2001;24(5):418-423.
  11. Altschuler JA, Casella SJ, MacKenzie TA, Curtis KM. The effect of cinnamon on A1C among adolescents with type 1 diabetes. Diabetes Care 2007;30(4):813-6. PubMed
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  19. Bernaola J, Valverde-Monge M, Otal-Buesa M, Cullen D, Heras-Mendaza F. Cinnamon allergic contact cheilitis. Contact Dermatitis 2023;88(5):418-419. PubMed
  20. Patel K, Howard M, Tate B. Cheilitis caused by allergic contact dermatitis to cinnamon in chai tea: A case report. Contact Dermatitis 2023;88(3):239-240. PubMed

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Motherwort 6 references
  1. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
  2. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
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  6. Cao Shan DOSOGC, Zhang W, Zhao Z, et al. Post-marketing safety surveillance and reevaluation of Motherwort injection: A clinical study of 10 094 cases. J Tradit Chin Med. 2018 Aug;38(4):625-635. DOI

See these in context on the Motherwort monograph →

Zedoary 5 references
  1. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  2. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  3. Tariq S, Imran M, Mushtaq Z, Asghar N. Phytopreventive antihypercholesterolemic and antilipidemic perspectives of zedoary (Curcuma Zedoaria Roscoe) herbal tea. Lipids Health Dis 2016;15:39. doi: 10.1186/s12944-016-0210-y.
  4. Rodseeda C, Yamanont P, Pinthong D, Korprasertthaworn P. Inhibitory effects of Thai herbal extracts on the cytochrome P450 3A-mediated the metabolism of gefitinib, lapatinib and sorafenib. Toxicol Rep 2022;9:1846-1852. PubMed
  5. Niu LQ, Xiao L, Cai QH, et al. Comparative effectiveness of Chinese herbal injections treating for rotavirus enteritis in children: A systematic review and Bayesian network meta-analysis. Integr Med Res 2023;12(2):100944. PubMed

See these in context on the Zedoary 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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