Chaste Berry Vitex Extract 300 mg Ingredients & Drug Interactions
by NOW
What is this page for?
First and foremost: checking Chaste Berry Vitex Extract 300 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
Chaste Berry Vitex Extract 300 mg is a dietary supplement by NOW with 2 active ingredients. Its ingredients are commonly taken for menopause symptoms, menstrual cramps and irregular periods, premenstrual syndrome (pms).Based on those ingredients, 243 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Dong Quai, Chaste Berry Tree Fruit Extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Chaste Berry Vitex Extract 300 mg by NOW
Ask about any prescription or over-the-counter medication and we check it for interactions with Chaste Berry Vitex Extract 300 mg by NOW — and tell you which ingredient is responsible.
AI summaries are generated from our interaction database for education only — always confirm with your pharmacist. How we use AI
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HelloPharmacist Scorecard of Chaste Berry Vitex Extract 300 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.
What’s inside
Full disclosure
This product has 2 active ingredients: Dong Quai and Chaste Berry Tree Fruit Extract. The supplement also contains inactive ingredients — maltodextrin, hypromellose, stearic acid, and silicon dioxide — which are fillers and capsule materials.
Does it work?
Moderate evidence
The evidence for Dong Quai isn't established in our data. The product is marketed for conditions including iron deficiency anemia, osteoporosis, heart disease, migraines, and eczema, but we hold insufficient reliable evidence to rate how well it works for any of these.
We have no effectiveness rating for Chaste Berry Tree Fruit Extract.
How safe is it?
Well-documented data
Dong Quai is generally well tolerated when taken by mouth; the most common side effects are burping and flatulence. It may increase your bleeding risk and cause skin sensitivity to sunlight, so use it with care if you're in the sun.
The safety data advises against Dong Quai during pregnancy because it may stimulate the uterus and affect bleeding. There isn't enough safety information for breastfeeding, so it's best avoided while nursing.
Dong Quai contains compounds linked to cancer risk in lab studies, but we don't know whether the amounts in supplements are high enough to cause harm with long-term or high-dose use.
Meds to double-check
Major interaction found
Check with us before taking this if you use warfarin or any blood thinner (Major interaction risk) or estrogens like hormone replacement therapy or birth control (Moderate risk). Also check other antiplatelet or anticoagulant drugs (Moderate risk).
The bottom line
Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. Major medication interactions have been identified, and safety information is well characterized.
If you're on warfarin, any other blood thinner, or estrogen therapy, talk to your pharmacist before taking this product — the interaction risk is real. Even if you're not on those medications, check your exact prescriptions with our tool first.
This supplement is not established as effective for the conditions it's marketed for.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 2 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Sep 25, 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
General information
Key facts about Chaste Berry Vitex Extract 300 mg, straight from the product label.
| Brand | NOW |
|---|---|
| Barcode (UPC) | 733739047731 |
| Net contents | 90 Veg Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Sep 25, 2025 |
| DSLD ID | 335223 |
| Product type | Botanical |
| Supplement form | Capsule |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Vegan, Vegetarian, Adult (18 - 50 Years), Kosher, Women (not pregnant or lactating), Gluten Free |
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 Chaste Berry Vitex Extract 300 mg by NOW, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Dong Quai | 150 mg | -- |
| Chaste Berry Tree Fruit Extract | 300 mg | -- |
Other ingredients: Maltodextrin, Hypromellose, Stearic Acid, Silicon Dioxide
Tap any ingredient to jump to its full detail below.
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 1 capsule daily.
Formula
Chaste berry has been traditionally used by herbalists for centuries; it is derived from the fruit of Vitex agnus-castus. More recently, scientific studies have indicated that chaste berry can support healthy endocrine function. The chaste berry extract in this formula is standardized to agnusides, the active components of chaste berry. Dong quai has been included to complete this women's health support formula.
Women's Health
Chaste Berry Vitex Extract 300 mg with Dong Quai
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. Keep out of reach of children.
Not for pregnant/nursing women. Consult physician if taking any medications (especially those that may affect coagulation) or have a medical condition (especially estrogen-sensitive conditions).
Not manufactured with yeast, wheat, gluten, soy, 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.
Women's Health Standardized Extract Supports Endocrine Function
Non GMO
Vegetarian/Vegan
Made and quality tested in the USA with globally sourced ingredients.
Not manufactured with yeast, wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients.
General Statements
This bottle is made from 100% PCR (post-consumer recycled) resin.
Botanicals/Herbs Family owned since 1968.
FDA Statement of Identity
A Dietary Supplement
Seals/Symbols
Triangle K (Kosher)
GMP Quality Assured
Storage
Store in a cool, dry place after opening.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Chaste Berry Vitex Extract 300 mg by NOW label
The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.
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)The Ingredients in Chaste Berry Vitex Extract 300 mg by NOW
These are the 2 active ingredients this product is made of. Select any to open its full monograph.
Serving size1 Veg 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.
Dong Quai
Interacts with163 drugs
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 & interactionsChaste Berry Tree Fruit Extract
Interacts with121 drugs
Vitex (chasteberry) is an herbal remedy most often used for PMS and menstrual cycle problems, and the strongest evidence is for easing some PMS sympto...
Chaste Berry Tree Fruit Extract monograph & interactionsOther (inactive) ingredients: Maltodextrin, Hypromellose, Stearic Acid, Silicon Dioxide. These complete the product’s ingredient list but are not active constituents.
Chaste Berry Vitex Extract 300 mg by NOW Drug Interactions
HelloPharmacist Interaction Report
NOW's Chaste Berry Vitex Extract 300 mg contains Dong Quai, which does interact with several medications.
The most serious concern is with warfarin (Coumadin), a blood thinner. Dong Quai may increase warfarin's blood-thinning effects and raise your bleeding risk — case reports show this can happen within weeks of starting the supplement.
Read the full breakdown — every affected drug type, severity by severity
Dong Quai also interacts with other blood thinners and antiplatelet drugs (like aspirin used for heart protection) at a Moderate severity level; it may increase bleeding risk with these too. If you take estrogens — whether hormone replacement therapy or birth control — Dong Quai may theoretically reduce their effectiveness by competing at the same receptor sites.
We couldn't check Chaste Berry Tree Fruit Extract for interactions; no data is on file for it. Altogether, these interactions span 163 individual medications.
Before you start this product, check your exact medications with the tool on this page, especially if you're on any blood thinner or hormone therapy.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Chaste Berry Vitex Extract 300 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 checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in Chaste Berry Vitex Extract 300 mg interact with 243 drugs. Click any drug to see the details.
2 of the 2 ingredients in Chaste Berry Vitex Extract 300 mg interact with drugs. Each result below shows which ingredient is responsible. Dong Quai Chaste Berry Tree Fruit Extract
WarfarinWarfarin
How Warfarin interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs, Warfarin (coumadin) Major
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Warfarin interactionWarfarin SodiumCoumadin, Panwarfin, Sofarin
How Warfarin Sodium interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs, Warfarin (coumadin) Major
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Warfarin Sodium interactionAbciximabReoPro
How Abciximab interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Abciximab interactionAbrocitinibCibinqo
How Abrocitinib interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Abrocitinib interactionAcenocoumarolSintrom
How Acenocoumarol interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Acenocoumarol interactionAcepromazineAtravet
How Acepromazine interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Chaste Berry Tree Fruit ExtractAntipsychotic Drugs Moderate
Interaction Summary
Theoretically, vitex agnus-castus could interfere with the activity of antipsychotic drugs.
Read the full Chaste Berry Tree Fruit Extract + Acepromazine interactionAcetaminophen, AspirinGemnisyn
How Acetaminophen, Aspirin interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Acetaminophen, Aspirin interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, IbuprofenCombogesic
How Acetaminophen, Ibuprofen interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Acetaminophen, Ibuprofen interactionAcetophenazineTindal
How Acetophenazine interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Chaste Berry Tree Fruit ExtractAntipsychotic Drugs Moderate
Interaction Summary
Theoretically, vitex agnus-castus could interfere with the activity of antipsychotic drugs.
Read the full Chaste Berry Tree Fruit Extract + Acetophenazine interactionAcetylsalicylic AcidEntrophen
How Acetylsalicylic Acid interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Acetylsalicylic Acid interactionAlteplase, TpaActilyse, Activase
How Alteplase, Tpa interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Alteplase, Tpa interactionAluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium HydroxideAscriptin Codeine #2
How Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interactionAluminum Hydroxide, Aspirin, Magnesium HydroxideAscriptin
How Aluminum Hydroxide, Aspirin, Magnesium Hydroxide interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Aluminum Hydroxide, Aspirin, Magnesium Hydroxide interactionAmitriptyline, PerphenazineEtrafon, Etrafon-A, Etrafon-Forte, Triavil
How Amitriptyline, Perphenazine interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Chaste Berry Tree Fruit ExtractAntipsychotic Drugs Moderate
Interaction Summary
Theoretically, vitex agnus-castus could interfere with the activity of antipsychotic drugs.
Read the full Chaste Berry Tree Fruit Extract + Amitriptyline, Perphenazine interactionAnacaulase-bcdbNexoBrid
How Anacaulase-bcdb interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Anacaulase-bcdb interactionAnagrelideAgrylin
How Anagrelide interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Anagrelide interactionAnisindioneMiradon
How Anisindione interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Anisindione interactionAntithrombin IiiThrombate III
How Antithrombin Iii interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Antithrombin Iii interactionApixabanEliquis
How Apixaban interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Apixaban interactionApomorphineAPO-go, APO-go Pen, APO-go PFS, Apokyn, Uprima
How Apomorphine interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Chaste Berry Tree Fruit ExtractDopamine Agonists Moderate
Interaction Summary
Theoretically, vitex agnus-castus could interfere with dopamine agonists.
Read the full Chaste Berry Tree Fruit Extract + Apomorphine interactionApomorphine HydrochlorideKynmobi
How Apomorphine Hydrochloride interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Chaste Berry Tree Fruit ExtractDopamine Agonists Moderate
Interaction Summary
Theoretically, vitex agnus-castus could interfere with dopamine agonists.
Read the full Chaste Berry Tree Fruit Extract + Apomorphine Hydrochloride interactionArgatrobanArgatroban
How Argatroban interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Argatroban interactionAripiprazoleAbilify, Abilify Maintena, Abilify Mycite
How Aripiprazole interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Chaste Berry Tree Fruit ExtractAntipsychotic Drugs Moderate
Interaction Summary
Theoretically, vitex agnus-castus could interfere with the activity of antipsychotic drugs.
Read the full Chaste Berry Tree Fruit Extract + Aripiprazole interactionAripiprazole LauroxilAristada, Aristada Initio Kit
How Aripiprazole Lauroxil interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Chaste Berry Tree Fruit ExtractAntipsychotic Drugs Moderate
Interaction Summary
Theoretically, vitex agnus-castus could interfere with the activity of antipsychotic drugs.
Read the full Chaste Berry Tree Fruit Extract + Aripiprazole Lauroxil interactionArmodafinilNuvigil
How Armodafinil interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Chaste Berry Tree Fruit ExtractDopamine Agonists Moderate
Interaction Summary
Theoretically, vitex agnus-castus could interfere with dopamine agonists.
Read the full Chaste Berry Tree Fruit Extract + Armodafinil interactionAsenapineSaphris, Secuado
How Asenapine interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Chaste Berry Tree Fruit ExtractAntipsychotic Drugs Moderate
Interaction Summary
Theoretically, vitex agnus-castus could interfere with the activity of antipsychotic drugs.
Read the full Chaste Berry Tree Fruit Extract + Asenapine interactionAspirinAngettes 75, ASA, Asaphen, Aspirin, Caprin, Cartia +8 more
How Aspirin interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Aspirin interactionAspirin, Aluminum Hydroxide, Codeine Phosphate, Magnesium HydroxideAscriptin Codeine #3
How Aspirin, Aluminum Hydroxide, Codeine Phosphate, Magnesium Hydroxide interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Aspirin, Aluminum Hydroxide, Codeine Phosphate, Magnesium Hydroxide interactionAspirin, ButalbitalAxotal
How Aspirin, Butalbital interacts with Chaste Berry Vitex Extract 300 mg — through 1 ingredient. Tap an ingredient for the detail:
Dong QuaiAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, dong quai may increase the risk of bleeding when used with anticoagulant or antiplatelet drugs; however, research is conflicting.
Read the full Dong Quai + Aspirin, Butalbital interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Chaste Berry Vitex Extract 300 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.
Dong Quai
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.
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.
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.
Chaste Berry Tree Fruit Extract
Antipsychotic Drugs
Theoretically, vitex agnus-castus could interfere with the activity of antipsychotic drugs.
Vitex agnus-castus might interfere with the action of dopamine antagonists such as antipsychotic drugs due to its dopamine agonist effects.
Contraceptive Drugs
Theoretically, vitex agnus-castus could interfere with oral contraceptives.
Vitex agnus-castus might interfere with the efficacy of oral contraceptives due to possible hormone modulating activity.
Dopamine Agonists
Theoretically, vitex agnus-castus could interfere with dopamine agonists.
Vitex agnus-castus might potentiate the actions of dopaminergic agonists due to possible dopaminergic effects.
Estrogens
Theoretically, vitex agnus-castus could interfere with the activity of estrogens.
Vitex agnus-castus has hormone modulating activity that can interfere with the efficacy of hormone replacement therapy.
Metoclopramide (Reglan)
Theoretically, dopaminergic effects of vitex agnus-castus could interfere with metoclopramide.
Vitex agnus-castus might interfere with the action of dopamine antagonists such as metoclopramide due to its possible dopaminergic effects.
Brand information
Manufacturer and brand details for Chaste Berry Vitex Extract 300 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
Chaste Berry Vitex Extract 300 mg by NOW: Common Questions
Does Chaste Berry Vitex Extract 300 mg by NOW interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Can I take this if I'm on birth control?
What are the most common side effects?
Is it safe during pregnancy?
Can I take this while breastfeeding?
Does this actually work for what it claims?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Chaste Berry Vitex Extract 300 mg is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
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.
The Full Monographs Behind Chaste Berry Vitex Extract 300 mg’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Dong Quai
Interacts with 163 drugsDong 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 monographVitex Agnus-castus
Interacts with 121 drugsVitex (chasteberry) is an herbal remedy most often used for PMS and menstrual cycle problems, and the strongest evidence is for easing some PMS symptoms. It is generally well tolerated by ma...
Read the full Vitex Agnus-castus monograph →Sources & How We Checked
Chaste Berry Vitex Extract 300 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.
- NIH Dietary Supplement Label Database (DSLD) — The official product label on file for this supplement.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference behind the ingredient interaction data.
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 42 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
- 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
- Page RL II, Lawrence JD. Potentiation of warfarin by dong quai. Pharmacotherapy 1999;19:870-6. PubMed
- Heck AM, DeWitt BA, Lukes AL. Potential interactions between alternative therapies and warfarin. Am J Health Syst Pharm 2000;57:1221-7. DOI
- 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.
- Dr. Duke's Phytochemical and Ethnobotanical Databases. Available at: http://www.ars-grin.gov/duke/.
- Amato P, Christophe S, Mellon PL. Estrogenic activity of herbs commonly used as remedies for menopausal symptoms. Menopause 2002;9:145-50. PubMed
- 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.
- Hoult JR, Paya M. Pharmacological and biochemical actions of simple coumarins: natural products with therapeutic potential. Gen Pharmacol 1996;27:713-22.. PubMed
- 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
- 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
- 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
- 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.
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