Red Clover Extract Powder 1000 mg Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Red Clover Extract Powder 1000 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
Red Clover Extract Powder 1000 mg is a dietary supplement by BulkSupplements.com with 1 active ingredient. Its ingredients are commonly taken for menopause symptoms (hot flashes), high cholesterol, bone health/osteoporosis.Based on those ingredients, 867 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Red Clover Aerial Parts Extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Red Clover Extract Powder 1000 mg by BulkSupplements.com
Ask about any prescription or over-the-counter medication and we check it for interactions with Red Clover Extract Powder 1000 mg by BulkSupplements.com — 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 Red Clover Extract Powder 1000 mg by BulkSupplements.com
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 contains one active ingredient: Red Clover Aerial Parts Extract at 1000 mg per serving. Red clover is a plant whose above-ground parts (flowers, stems, and leaves) are concentrated into this extract.
The extract contains isoflavones, naturally occurring phytoestrogens that are the source of red clover's effects in the body. The only inactive ingredient is dextrin, a simple carbohydrate used as a filler.
Does it work?
Couldn't assess
The evidence for red clover's effectiveness is not established for the conditions it's commonly used for. Our data shows insufficient reliable evidence to rate it for menopausal symptoms, osteoporosis, osteoarthritis, or hair loss (androgenic alopecia).
That doesn't mean it doesn't work — it means clinical trials haven't yet proven it does. If you're considering red clover for one of these reasons, talk with your pharmacist or doctor about whether the current evidence supports a trial.
How safe is it?
Well-documented data
Red clover is generally well tolerated in short-term use by healthy adults, but its estrogen-like activity means you should be cautious if you have hormone-sensitive conditions. The most common side effects from oral use are muscle aches, nausea, and vaginal spotting.
There's theoretical concern that red clover's isoflavones might increase breast density in premenopausal women, though a review of clinical trials suggests any increase is modest. Red clover should be avoided during pregnancy because of its estrogen-like effects and lack of safety data.
There isn't enough safety information for breastfeeding — best to avoid it then too.
Meds to double-check
Moderate interaction found
Check with your pharmacist before starting if you take estrogen-containing medications (including birth control), methotrexate, tamoxifen, blood thinners (anticoagulants), antiplatelet drugs like aspirin, or any medication metabolized by your liver's CYP enzymes — which includes a very large range of drugs. The interaction checker below will flag your specific medications.
The bottom line
Scorecard at a glanceFully disclosed formula with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.
Red clover is worth considering if you're exploring options for menopausal symptoms or bone health, but the evidence of benefit isn't yet solid. If you take estrogen therapy, methotrexate, tamoxifen, or blood thinners, you need to check with your pharmacist first — red clover could interfere.
Pregnant or breastfeeding? Skip it.
Otherwise, it's generally well tolerated, but let us know what medications you're on.
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 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
General information
Key facts about Red Clover Extract Powder 1000 mg, straight from the product label.
| Brand | BulkSupplements.com |
|---|---|
| Barcode (UPC) | X000ZEK6BP |
| Net contents | 250 Gram(s); 8.8 Ounce(s) |
| Market status | On market |
| Date entered into DSLD | Apr 24, 2025 |
| DSLD ID | 330487 |
| Product type | Botanical |
| Supplement form | Powder |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Gluten Free, Dairy 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 Red Clover Extract Powder 1000 mg by BulkSupplements.com, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Red Clover Aerial Parts Extract | 1000 mg | -- |
Other ingredients: Dextrin
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.
Formula
Red Clover Extract Powder 1000 mg per serving
Brand IP Statement(s)
BulkSupplements.com Clean & pure bulk supplements
Formulation
Color may vary
Free of: Added sugar, soy, dairy, yeast, gluten
FDA Disclaimer Statement
Warning: This product is not intended to diagnose, treat, cure, or prevent any disease.
Precautions
Always consult a physician before taking any dietary supplement.
Keep out of reach of children.
Suggested/Recommended/Usage/Directions
Suggested Use: As a dietary supplement, take 1000 mg (about 1/3 tsp) once daily with meal, or as directed by a physician.
Storage
Contents are sold by weight, not volume. Settling may occur. Store in a dry, cool place
General Statements
Use an accurate milligram scale. New
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Red Clover Extract Powder 1000 mg by BulkSupplements.com 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 Red Clover Extract Powder 1000 mg by BulkSupplements.com
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size1000 mg Dosage formPowder Servings per container250 Amounts shown are per serving.
Red Clover Aerial Parts Extract
Interacts with867 drugs
Red clover is a plant rich in isoflavones (plant compounds with weak estrogen-like activity) that is most often used for menopause symptoms like hot f...
Red Clover Aerial Parts Extract monograph & interactionsOther (inactive) ingredients: Dextrin. These complete the product’s ingredient list but are not active constituents.
Red Clover Extract Powder 1000 mg by BulkSupplements.com Drug Interactions
HelloPharmacist Interaction Report
Red Clover Extract Powder by BulkSupplements.com does interact with several medication types, and the concern centers on estrogen-containing drugs.
Red clover contains phytoestrogens — plant compounds that mimic estrogen in the body. In theory, these can compete with your body's estrogen receptors and interfere with estrogen therapy, potentially making those medications less effective.
Read the full breakdown — every affected drug type, severity by severity
There are two other Moderate-severity concerns. Red clover might raise the risk of methotrexate toxicity (a drug used for psoriasis and other conditions); one case report documented severe nausea and stomach pain in a woman taking both.
It may also interfere with tamoxifen, a breast cancer medication — though animal research is mixed on whether this actually happens in practice.
Red clover could theoretically affect how your liver processes several drug types, including blood thinners and antiplatelet medications (like aspirin), certain cancer drugs, and a number of others metabolized through CYP1A2, CYP2C9, CYP2C19, or CYP3A4 enzymes. However, small clinical studies have found no actual effect at the doses tested.
Altogether, these interactions span 857 individual medications.
Before you start red clover, run your exact prescription medications through the interaction checker on this page — especially if you take estrogen, methotrexate, tamoxifen, or blood thinners.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Red Clover Extract Powder 1000 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 Red Clover Extract Powder 1000 mg interact with 867 drugs. Click any drug to see the details.
1 of the 1 ingredient in Red Clover Extract Powder 1000 mg interact with drugs. Each result below shows which ingredient is responsible. Red Clover Aerial Parts Extract
Ado-trastuzumab EmtansineKadcyla
How Ado-trastuzumab Emtansine interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP3A4; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Ado-trastuzumab Emtansine interactionAbciximabReoPro
How Abciximab interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Although some laboratory research suggests that red clover may have anticoagulant and antiplatelet activity, clinical research has not shown this effect.
Read the full Red Clover Aerial Parts Extract + Abciximab interactionAbemaciclibVerzenio
How Abemaciclib interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP3A4; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Abemaciclib interactionAbiraterone
How Abiraterone interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP3A4; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Abiraterone interactionAbiraterone AcetateYonsa, Zytiga
How Abiraterone Acetate interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP3A4; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Abiraterone Acetate interactionAbrocitinibCibinqo
How Abrocitinib interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 2c19 (cyp2c19) Substrates, Cytochrome P450 2c9 (cyp2c9) Substrates +1 Minor
Interaction Summary
Theoretically, red clover might increase the levels and clinical effects of drugs metabolized by CYP2C19.
Read the full Red Clover Aerial Parts Extract + Abrocitinib interactionAcalabrutinibCalquence
How Acalabrutinib interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP3A4; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acalabrutinib interactionAcenocoumarolSintrom
How Acenocoumarol interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Although some laboratory research suggests that red clover may have anticoagulant and antiplatelet activity, clinical research has not shown this effect.
Read the full Red Clover Aerial Parts Extract + Acenocoumarol interactionAcetaminophenChildren's Tylenol, Children's Tylenol Meltaways, Tylenol, Tylenol Ex Strength
How Acetaminophen interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 1a2 (cyp1a2) Substrates Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP1A2; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen interactionAcetaminophen, AspirinGemnisyn
How Acetaminophen, Aspirin interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Anticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP1A2; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Aspirin interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractAnticoagulant/antiplatelet Drugs, Cytochrome P450 1a2 (cyp1a2) Substrates +2 Minor
Interaction Summary
Although some laboratory research suggests that red clover may have anticoagulant and antiplatelet activity, clinical research has not shown this effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, Brompheniramine, PhenylpropanolamineDimetapp Cold and Flu
How Acetaminophen, Brompheniramine, Phenylpropanolamine interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 1a2 (cyp1a2) Substrates Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP1A2; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Brompheniramine, Phenylpropanolamine interactionAcetaminophen, ButalbitalAxocet, Bancap, Bucet, Butex Forte, Esgic CF, Orbivan CF +5 more
How Acetaminophen, Butalbital interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 1a2 (cyp1a2) Substrates Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP1A2; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Butalbital interactionAcetaminophen, Butalbital, CaffeineEsgic, Esgic Plus, Fiogesic, Fioricet, Repan, Tecnal +1 more
How Acetaminophen, Butalbital, Caffeine interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates +1 Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP1A2; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Butalbital, Caffeine interactionAcetaminophen, Butalbital, Caffeine, CodeineEsgic with Codeine, Fioricet w/ Codeine
How Acetaminophen, Butalbital, Caffeine, Codeine interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCaffeine, Cytochrome P450 1a2 (cyp1a2) Substrates +1 Minor
Interaction Summary
Theoretically, soy might reduce the clearance of caffeine; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Butalbital, Caffeine, Codeine interactionAcetaminophen, Butalbital, CodeineBancap w/ Codeine
How Acetaminophen, Butalbital, Codeine interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 1a2 (cyp1a2) Substrates Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP1A2; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Butalbital, Codeine interactionAcetaminophen, Butalbital, Codeine PhosphatePhrenilin #3
How Acetaminophen, Butalbital, Codeine Phosphate interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 1a2 (cyp1a2) Substrates Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP1A2; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Butalbital, Codeine Phosphate interactionAcetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, PhenylephrineHycomine Compound
How Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Caffeine +1 Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP1A2; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interactionAcetaminophen, Caffeine, CodeineGesic C15, Gesic C30, Gesic C8, Lenoltec 1, Lenoltec 2, Lenoltec 3 +1 more
How Acetaminophen, Caffeine, Codeine interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates +1 Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP3A4; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Caffeine, Codeine interactionAcetaminophen, Caffeine, Codeine, SalicylamideCodalan No.1, Codalan No.2, Codalan No.3
How Acetaminophen, Caffeine, Codeine, Salicylamide interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCaffeine, Cytochrome P450 1a2 (cyp1a2) Substrates +1 Minor
Interaction Summary
Theoretically, soy might reduce the clearance of caffeine; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Caffeine, Codeine, Salicylamide interactionAcetaminophen, Caffeine, DihydrocodeineDHC Plus, Panlor DC, Panlor SS
How Acetaminophen, Caffeine, Dihydrocodeine interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates +1 Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP3A4; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Caffeine, Dihydrocodeine interactionAcetaminophen, Caffeine, IsomethepteneMigralam
How Acetaminophen, Caffeine, Isometheptene interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCaffeine, Cytochrome P450 1a2 (cyp1a2) Substrates +1 Minor
Interaction Summary
Theoretically, soy might reduce the clearance of caffeine; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Caffeine, Isometheptene interactionAcetaminophen, Caffeine, PyrilamineMidol Max Strength Menstrual
How Acetaminophen, Caffeine, Pyrilamine interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates +1 Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP3A4; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Caffeine, Pyrilamine interactionAcetaminophen, Chlorpheniramine Maleate, Dextromethorphan HbrVicks Formula 44M Cough, Cold & Flu Relief
How Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP3A4; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interactionAcetaminophen, Chlorpheniramine, Codeine, PhenylephrineColrex
How Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP1A2; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interactionAcetaminophen, Chlorpheniramine, DextromethorphanCoricidin II Extra Strength Cold and Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP1A2; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Chlorpheniramine, Dextromethorphan interactionAcetaminophen, Chlorpheniramine, Dextromethorphan HydrobromideCoricidin HBP Maximum Strength Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP3A4; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PhenylpropanolamineMulti Symptom Cold Relief
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP1A2; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PseudoephedrineChildren's Tylenol Cold Plus Cough, Tylenol Cold Ex Strength
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP3A4; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interactionAcetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, SalicylamideRhinogesic GG
How Acetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, Salicylamide interacts with Red Clover Extract Powder 1000 mg — through 1 ingredient. Tap an ingredient for the detail:
Red Clover Aerial Parts ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, red clover might increase levels of drugs metabolized by CYP1A2; however, a small clinical study found no effect.
Read the full Red Clover Aerial Parts Extract + Acetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, Salicylamide interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Red Clover Extract Powder 1000 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.
Red Clover Aerial Parts Extract
Estrogens
Theoretically, concomitant use of large amounts of red clover might interfere with estrogen therapy.
Red clover contains phytoestrogens which might have estrogenic activity in some people. Theoretically, red clover might compete for estrogen receptors and interfere with estrogen-containing drug therapy.
Methotrexate (Trexall, Others)
Theoretically, red clover might increase the risk of methotrexate toxicity.
In a case report, a 52-year-old female receiving weekly methotrexate injections for psoriasis developed symptoms of methotrexate toxicity, including severe vomiting and epigastric pain, after three days of taking red clover 430 mg daily. Toxicity resolved after red clover was discontinued. However, no liver function tests or methotrexate levels were reported.
Tamoxifen (Nolvadex)
Theoretically, the phytoestrogens in red clover might interfere with tamoxifen.
In vitro and animal research suggests that genistein, a constituent of red clover, might antagonize the antitumor effects of tamoxifen. However, there is some evidence from an animal study that red clover does not reduce the efficacy of tamoxifen. Until more is known, tell patients taking tamoxifen to avoid red clover.
Anticoagulant/Antiplatelet Drugs
Although some laboratory research suggests that red clover may have anticoagulant and antiplatelet activity, clinical research has not shown this effect.
In vitro research suggests that genistein in red clover has antiplatelet effects, and historically, red clover was thought to have anticoagulant effects due to its coumarin content. However, some experts state that this is unlikely as most natural coumarins have not been shown to have anticoagulant effects, and their content in red clover is low. Additionally, some clinical research in postmenopausal patients found no effect on coagulation or prothrombin time with the use of red clover flowering tops 378 mg daily for 12 months or red clover isoflavone (Rimostil) 50 mg daily for 2 years.
Caffeine
Theoretically, soy might reduce the clearance of caffeine; however, a small clinical study found no effect.
Red clover contains genistein. Taking genistein 1 gram daily for 14 days seems to inhibit caffeine clearance and metabolism in healthy females. However, this effect does not seem to occur with the lower amounts of genistein found in red clover. A clinical study in healthy postmenopausal individuals shows that taking red clover capsules standardized to contain 60 mg isoflavones twice daily for 14 days does not affect the pharmacokinetics of caffeine.
Cytochrome P450 1A2 (Cyp1A2) Substrates
Theoretically, red clover might increase levels of drugs metabolized by CYP1A2; however, a small clinical study found no effect.
In vitro evidence shows that red clover inhibits CYP1A2. However, a clinical study in healthy postmenopausal individuals shows that taking red clover capsules standardized to contain 60 mg isoflavones twice daily for 14 days does not affect the pharmacokinetics of caffeine, a CYP1A2 probe substrate.
Cytochrome P450 2C19 (Cyp2C19) Substrates
Theoretically, red clover might increase the levels and clinical effects of drugs metabolized by CYP2C19.
In vitro evidence suggests that red clover weakly inhibits CYP2C19. This interaction has not been reported in humans.
Cytochrome P450 2C9 (Cyp2C9) Substrates
Theoretically, red clover might increase levels of drugs metabolized by CYP2C9; however, a small clinical study found no effect.
In vitro evidence suggests that red clover might inhibit CYP2C9. However, a clinical study in healthy postmenopausal individuals shows that taking red clover capsules standardized to contain 60 mg isoflavones twice daily for 14 days does not affect the pharmacokinetics of tolbutamide, a CYP2C9 probe substrate.
Cytochrome P450 3A4 (Cyp3A4) Substrates
Theoretically, red clover might increase levels of drugs metabolized by CYP3A4; however, a small clinical study found no effect.
In vitro evidence shows that red clover might inhibit CYP3A4 isoenzymes. However, a clinical study in healthy postmenopausal individuals shows that taking red clover capsules standardized to contain 60 mg isoflavones twice daily for 14 days does not affect the pharmacokinetics of alprazolam, a CYP3A4 probe substrate.
Brand information
Manufacturer and brand details for Red Clover Extract Powder 1000 mg, from the product label.
BulkSupplements.com
See all BulkSupplements.com products- Name
- BulkSupplements.com
- Street Address
- 7511 Eastgate Rd
- City
- Henderson
- State
- NV
- ZipCode
- 89011
- Web Address
- BulkSupplements.com
Red Clover Extract Powder 1000 mg by BulkSupplements.com: Common Questions
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Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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The Full Monographs Behind Red Clover Extract Powder 1000 mg’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Red Clover Extract Powder 1000 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 24 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.
Red Clover 24 references
- Kurzer MS, Xu X. Dietary phytoestrogens. Annu Rev Nutr 1997;17:353-81. PubMed
- 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
- Budzinski JW, Foster BC, Vandenhoek S, Arnason JT. An in vitro evaluation of human cytochrome P450 3A4 inhibition by selected commercial herbal extracts and tinctures. Phytomedicine 2000;7:273-82. PubMed
- This P, De La Rochefordiere A, Clough K, et al. Phytoestrogens after breast cancer. Endocr Relat Cancer 2001;8:129-34. PubMed
- Tice J, Cummings SR, Ettinger B, et al. Few adverse effects of two red clover extracts rich in phytoestrogens: a multicenter, placebo-controlled trial. Alt Ther 2001;7:S33.
- Ingram DM, Hickling C, West L, et al. A double-blind randomized controlled trial of isoflavones in the treatment of cyclical mastalgia. The Breast 2002;11:170-4. PubMed
- Unger M, Frank A. Simultaneous determination of the inhibitory potency of herbal extracts on the activity of six major cytochrome P450 enzymes using liquid chromatography/mass spectrometry and automated online extraction. Rapid Commun Mass Spectrom 2004;1 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
- Geller SE, Shulman LP, van Breemen RB, et al. Safety and efficacy of black cohosh and red clover for the management of vasomotor symptoms: a randomized controlled trial. Menopause 2009;16:1156-66. PubMed
- Hidalgo LA, Chedraui PA, Morocho N, et al. The effect of red clover isoflavones on menopausal symptoms, lipids and vaginal cytology in menopausal women: a randomized, double-blind, placebo-controlled study. Gynecol Endocrinol 2005;21(5):257-264. PubMed
- Campbell MJ, Woodside JV, Honour JW, et al. Effect of red clover-derived isoflavone supplementation on insulin-like growth factor, lipid and antioxidant status in healthy female volunteers: a pilot study. Eur J Clin Nutr 2004;58(1):173-179. PubMed
- Guerrero JA, Lozano ML, Castillo J, et al. Flavonoids inhibit platelet function through binding to the thromboxane A2 receptor. J Thromb Haemost 2005;3(2):369-376. PubMed
- Kondo K, Suzuki Y, Ikeda Y, Umemura K. Genistein, an isoflavone included in soy, inhibits thrombotic vessel occlusion in the mouse femoral artery and in vitro platelet aggregation. Eur J Pharmacol 2002;455(1):53-57. PubMed
- Polini N, Rauschemberger MB, Mendiberri J, et al. Effect of genistein and raloxifene on vascular dependent platelet aggregation. Mol Cell Endocrinol 2007;267(1-2):55-62. PubMed
- Wuttke W, Jarry H, Seidlova-Wuttke D. Plant-derived alternative treatments for the aging male: facts and myths. Aging Male 2010;13(2):75-81. PubMed
- Villaseca P. Non-estrogen conventional and phytochemical treatments for vasomotor symptoms: what needs to be known for practice. Climacteric 2012;15(2):115-124. PubMed
- Chen, Y., Xiao, C. Q., He, Y. J., Chen, B. L., Wang, G., Zhou, G., Zhang, W., Tan, Z. R., Cao, S., Wang, L. P., and Zhou, H. H. Genistein alters caffeine exposure in healthy female volunteers. Eur.J Clin.Pharmacol. 2011;67(4):347-353. PubMed
- Friedman, J. A., Taylor, S. A., McDermott, W., and Alikhani, P. Multifocal and recurrent subarachnoid hemorrhage due to an herbal supplement containing natural coumarins. Neurocrit.Care 2007;7(1):76-80. PubMed
- Hooper, L., Madhavan, G., Tice, J. A., Leinster, S. J., and Cassidy, A. Effects of isoflavones on breast density in pre- and post-menopausal women: a systematic review and meta-analysis of randomized controlled trials. Hum.Reprod.Update. 2010;16(6):745-7 PubMed
- Orr A and Parker R. Red clover causing symptoms suggestive of methotrexate toxicity in a patient on high-dose methotrexate. Menopause Int. 2013;19(3):133-134. PubMed
- Clifton-Bligh PB, et al. Red cover isoflavones enriched with formononetin lower serum LDL cholesterol- a randomized, double-blind, placebo-controlled trial. Eur J Clin Nutr. 2015;69(1):134-142.
- Risk assessment for peri- and post-menopausal women taking food supplements containing isolated isoflavones. EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS). 2015. DOI
- Ferraris C, Ballestra B, Listorti C, et al. Red clover and lifestyle changes to contrast menopausal symptoms in premenopausal patients with hormone-sensitive breast cancer receiving tamoxifen. Breast Cancer Res Treat 2020;180(1):157-65. doi: 10.1007/s1054 PubMed
- Chen L, Choi J, Leonard SW, et al. No Clinically Relevant Pharmacokinetic Interactions of a Red Clover Dietary Supplement with Cytochrome P450 Enzymes in Women. J Agric Food Chem. 2020;68(47):13929-13939. PubMed
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