Grape Seed Extract 200 mg Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Grape Seed Extract 200 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
Grape Seed Extract 200 mg is a dietary supplement by BulkSupplements.com with 1 active ingredient. Its ingredients are commonly taken for antioxidant support, heart and circulation health, vein problems (such as varicose veins).Based on those ingredients, 910 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Grape extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Grape Seed Extract 200 mg by BulkSupplements.com
Ask about any prescription or over-the-counter medication and we check it for interactions with Grape Seed Extract 200 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 Grape Seed Extract 200 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: grape extract at 200 mg per capsule. Grapes contain compounds called proanthocyanidins (a type of flavonoid) that are thought to have antioxidant and blood-vessel-protecting effects.
The capsule itself is made from bovine gelatin, which is an inactive ingredient (a capsule shell). There are no other added fillers or binders listed.
Does it work?
Moderate evidence
Grape seed extract is possibly effective for chronic venous insufficiency (CVI)—a condition where blood doesn't return well from the legs, causing swelling and aching. The evidence for other uses in the facts—chemotherapy-related nausea, hay fever, and weight loss—is rated possibly ineffective, meaning studies haven't shown clear benefit.
How safe is it?
Well-documented data
Grapes and grape seed extract are generally well tolerated. The most common side effects in studies are mild: abdominal pain, diarrhea, dry mouth, indigestion, headache, joint pain, and nausea.
Anaphylaxis (a severe allergic reaction) to grape skin has been reported but is very rare. For pregnancy and breastfeeding: whole grapes are fine, but concentrated grape supplements haven't been well studied in pregnancy, so they're not recommended.
There's also not enough data on concentrated supplements while breastfeeding—talk with your doctor or pharmacist about whether this product is right for you if you're pregnant or nursing.
Meds to double-check
Moderate interaction found
Before taking this product, check with your doctor or pharmacist if you're on any of these: blood thinners or antiplatelet drugs (like warfarin or aspirin)—there's a moderate risk of increased bleeding; cyclosporine (an immunosuppressant)—grape extract can reduce how much your body absorbs, so you may need to time doses; midazolam (a sedative)—long-term use might weaken its effect; or any medication broken down by liver enzymes CYP1A2, CYP2D6, CYP2E1, or CYP3A4. If you're unsure whether your drugs fall into these categories, run them through the checker on this page.
The bottom line
Scorecard at a glanceFully disclosed formula with some supporting evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.
Grape seed extract may work for leg swelling and poor circulation (chronic venous insufficiency), but it interacts with a large number of medications—especially blood thinners, clot preventers, and many drugs your liver processes. If you take any prescription medication, check it against the interaction tool before you start.
Talk with your doctor or pharmacist to make sure it's safe alongside your regimen.
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 Aug 23, 2021.
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 Grape Seed Extract 200 mg, straight from the product label.
| Brand | BulkSupplements.com |
|---|---|
| Net contents | 100 Gelatin Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Aug 23, 2021 |
| DSLD ID | 253600 |
| Product type | Botanical |
| Supplement form | Capsule |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Women (not pregnant or lactating), Gluten Free, Dairy Free, Sugar 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 Grape Seed Extract 200 mg by BulkSupplements.com, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Grape extract | 200 mg | -- |
Other ingredients: Bovine Gelatin Capsules
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.
General Statements
Clean & pure bulk supplements
Precautions
Warning: This product is not intended for use by those with a serious medical condition or pregnant or lactating women.
Consult your physician before use.
Keep out of reach of children!
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.
Formulation
Free of: Sugar, soy, dairy, yeast, gluten or additives
Suggested/Recommended/Usage/Directions
Directions: As a dietary supplement, take 1 capsule daily or every other day, or as directed by a physician.
Storage
Storage: Keep dry, cool & dark
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Grape Seed Extract 200 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 Grape Seed Extract 200 mg by BulkSupplements.com
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size1 Capsule(s) Dosage formCapsule Servings per container100 Amounts shown are per serving.
Grape extract
Interacts with910 drugs
Grapes and grape products like grape seed extract contain antioxidant compounds such as resveratrol and proanthocyanidins that may support heart and b...
Grape extract monograph & interactionsOther (inactive) ingredients: Bovine Gelatin Capsules. These complete the product’s ingredient list but are not active constituents.
Grape Seed Extract 200 mg by BulkSupplements.com Drug Interactions
HelloPharmacist Interaction Report
Grape Seed Extract 200 mg by BulkSupplements.com does interact with several categories of medications, mainly through its effects on how your liver processes drugs.
The most serious concern is with blood thinners and antiplatelet drugs (medications that prevent clots)—grape extract may increase bleeding risk if you're taking warfarin, aspirin, or similar medications. This is thought to be due to antiplatelet effects in the extract itself.
Read the full breakdown — every affected drug type, severity by severity
Grape seed extract may also affect how your liver breaks down many other drugs. It can theoretically increase levels of certain medications (CYP2D6 and CYP2E1 substrates), which could make them stronger or cause side effects.
With other drugs (CYP3A4 substrates), the picture is mixed—research suggests it might either increase or decrease their levels, so the effect is unpredictable. There's also a specific concern with cyclosporine (an immunosuppressant): grape juice reduced its absorption by up to 30% in one study, so separating doses by at least 2 hours is recommended.
Long-term use might also weaken midazolam (a sedative), though a single dose appears safe.
CYP1A2 substrates (drugs broken down by another liver enzyme) may actually be processed faster when you take grape extract, potentially making them less effective. One small study found grape juice reduced phenacetin levels in the blood.
Altogether, these interactions span 911 individual medications. Check your exact prescriptions with the tool on this page before you start.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Grape Seed Extract 200 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 Grape Seed Extract 200 mg interact with 910 drugs. Click any drug to see the details.
1 of the 1 ingredient in Grape Seed Extract 200 mg interact with drugs. Each result below shows which ingredient is responsible. Grape extract
Acetaminophen, OxycodonePercocet, Roxicet, Tylox, Xartemis XR
How Acetaminophen, Oxycodone interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 2e1 (cyp2e1) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates +1 Moderate
Interaction Summary
Theoretically, grape seed extract might increase the levels of CYP2E1 substrates.
Read the full Grape Extract + Acetaminophen, Oxycodone interactionAcetaminophen, Pamabrom, PyrilamineMidol Max Strength PMS, Pamprin, Pamprin ES
How Acetaminophen, Pamabrom, Pyrilamine interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 2e1 (cyp2e1) Substrates Moderate
Interaction Summary
Theoretically, grape juice might reduce the levels of CYP1A2 substrates.
Read the full Grape Extract + Acetaminophen, Pamabrom, Pyrilamine interactionAcetaminophen, PentazocineTalacen
How Acetaminophen, Pentazocine interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 2e1 (cyp2e1) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates Moderate
Interaction Summary
Theoretically, grape seed extract might increase the levels of CYP2E1 substrates.
Read the full Grape Extract + Acetaminophen, Pentazocine interactionAcetaminophen, Phenylephrine, ChlorpheniramineSuper Cold Tabs
How Acetaminophen, Phenylephrine, Chlorpheniramine interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates +1 Moderate
Interaction Summary
Theoretically, grape juice might reduce the levels of CYP1A2 substrates.
Read the full Grape Extract + Acetaminophen, Phenylephrine, Chlorpheniramine interactionAcetaminophen, PhenylpropanolamineTetra Caps
How Acetaminophen, Phenylpropanolamine interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 2e1 (cyp2e1) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates Moderate
Interaction Summary
Theoretically, grape seed extract might increase the levels of CYP2E1 substrates.
Read the full Grape Extract + Acetaminophen, Phenylpropanolamine interactionAcetaminophen, Phenylpropanolamine, PhenyltoloxamineSinubid
How Acetaminophen, Phenylpropanolamine, Phenyltoloxamine interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 2e1 (cyp2e1) Substrates Moderate
Interaction Summary
Theoretically, grape juice might reduce the levels of CYP1A2 substrates.
Read the full Grape Extract + Acetaminophen, Phenylpropanolamine, Phenyltoloxamine interactionAcetaminophen, PhenyltoloxaminePercogesic, Relagesic
How Acetaminophen, Phenyltoloxamine interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 2e1 (cyp2e1) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates Moderate
Interaction Summary
Theoretically, grape seed extract might increase the levels of CYP2E1 substrates.
Read the full Grape Extract + Acetaminophen, Phenyltoloxamine interactionAcetaminophen, Phenyltoloxamine, SalicylamideLobac
How Acetaminophen, Phenyltoloxamine, Salicylamide interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 2e1 (cyp2e1) Substrates Moderate
Interaction Summary
Theoretically, grape juice might reduce the levels of CYP1A2 substrates.
Read the full Grape Extract + Acetaminophen, Phenyltoloxamine, Salicylamide interactionAcetaminophen, PropoxypheneDarvocet-N 100, Darvocet-N 50, E-Lor, Wygesic
How Acetaminophen, Propoxyphene interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 2e1 (cyp2e1) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates +1 Moderate
Interaction Summary
Theoretically, grape seed extract might increase the levels of CYP2E1 substrates.
Read the full Grape Extract + Acetaminophen, Propoxyphene interactionAcetaminophen, PseudoephedrineChildren's Tylenol Sinus, Dristan N.D., Non-Aspirin Sinus, Ornex, Ornex-Max, Sinutab +5 more
How Acetaminophen, Pseudoephedrine interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 2e1 (cyp2e1) Substrates Moderate
Interaction Summary
Theoretically, grape juice might reduce the levels of CYP1A2 substrates.
Read the full Grape Extract + Acetaminophen, Pseudoephedrine interactionAcetaminophen, Pseudoephedrine, TriprolidineActifed Plus ES
How Acetaminophen, Pseudoephedrine, Triprolidine interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 2e1 (cyp2e1) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates Moderate
Interaction Summary
Theoretically, grape seed extract might increase the levels of CYP2E1 substrates.
Read the full Grape Extract + Acetaminophen, Pseudoephedrine, Triprolidine interactionAcetylsalicylic AcidEntrophen
How Acetylsalicylic Acid interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, grape extracts may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Grape Extract + Acetylsalicylic Acid interactionAdagrasibKrazati
How Adagrasib interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
It is unclear if grape seed extract inhibits or induces CYP3A4; research is conflicting.
Read the full Grape Extract + Adagrasib interactionAerosphere Budesonide, Formoterol Fumarate, GlycopyrrolateBreztri
How Aerosphere Budesonide, Formoterol Fumarate, Glycopyrrolate interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 2d6 (cyp2d6) Substrates, Cytochrome P450 2c9 (cyp2c9) Substrates Moderate
Interaction Summary
Theoretically, grape seed extract may increase the levels of CYP2D6 substrates.
Read the full Grape Extract + Aerosphere Budesonide, Formoterol Fumarate, Glycopyrrolate interactionAgomelatineValdoxan
How Agomelatine interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 2c9 (cyp2c9) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates Moderate
Interaction Summary
It is unclear if grape juice or grape seed extract inhibits CYP2C9; research is conflicting.
Read the full Grape Extract + Agomelatine interactionAlfentanilAlfenta
How Alfentanil interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
It is unclear if grape seed extract inhibits or induces CYP3A4; research is conflicting.
Read the full Grape Extract + Alfentanil interactionAlfuzosinUroxatral
How Alfuzosin interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
It is unclear if grape seed extract inhibits or induces CYP3A4; research is conflicting.
Read the full Grape Extract + Alfuzosin interactionAliskirenTekturna
How Aliskiren interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
It is unclear if grape seed extract inhibits or induces CYP3A4; research is conflicting.
Read the full Grape Extract + Aliskiren interactionAlmotriptanAlmogran, Axert
How Almotriptan interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
It is unclear if grape seed extract inhibits or induces CYP3A4; research is conflicting.
Read the full Grape Extract + Almotriptan interactionAlogliptinNesina
How Alogliptin interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
It is unclear if grape seed extract inhibits or induces CYP3A4; research is conflicting.
Read the full Grape Extract + Alogliptin interactionAlogliptin, PioglitazoneOseni
How Alogliptin, Pioglitazone interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
It is unclear if grape seed extract inhibits or induces CYP3A4; research is conflicting.
Read the full Grape Extract + Alogliptin, Pioglitazone interactionAlpelisibPiqray
How Alpelisib interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
It is unclear if grape seed extract inhibits or induces CYP3A4; research is conflicting.
Read the full Grape Extract + Alpelisib interactionAlprazolamNiravam, Xanax
How Alprazolam interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
It is unclear if grape seed extract inhibits or induces CYP3A4; research is conflicting.
Read the full Grape Extract + Alprazolam interactionAlteplase, TpaActilyse, Activase
How Alteplase, Tpa interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, grape extracts may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Grape Extract + Alteplase, Tpa interactionAluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium HydroxideAscriptin Codeine #2
How Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractAnticoagulant/antiplatelet Drugs, Cytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, grape extracts may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Grape Extract + Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interactionAluminum Hydroxide, Aspirin, Magnesium HydroxideAscriptin
How Aluminum Hydroxide, Aspirin, Magnesium Hydroxide interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, grape extracts may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Grape Extract + Aluminum Hydroxide, Aspirin, Magnesium Hydroxide interactionAmbrisentanLetairis, Volibris
How Ambrisentan interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
It is unclear if grape seed extract inhibits or induces CYP3A4; research is conflicting.
Read the full Grape Extract + Ambrisentan interactionAmiodaroneCordarone, Pacerone
How Amiodarone interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
It is unclear if grape seed extract inhibits or induces CYP3A4; research is conflicting.
Read the full Grape Extract + Amiodarone interactionAmitriptylineElavil
How Amitriptyline interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates +2 Moderate
Interaction Summary
It is unclear if grape seed extract inhibits or induces CYP3A4; research is conflicting.
Read the full Grape Extract + Amitriptyline interactionAmitriptyline, ChlordiazepoxideLimbitrol DS
How Amitriptyline, Chlordiazepoxide interacts with Grape Seed Extract 200 mg — through 1 ingredient. Tap an ingredient for the detail:
Grape ExtractCytochrome P450 2c9 (cyp2c9) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates +2 Moderate
Interaction Summary
It is unclear if grape juice or grape seed extract inhibits CYP2C9; research is conflicting.
Read the full Grape Extract + Amitriptyline, Chlordiazepoxide interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Grape Seed Extract 200 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.
Grape extract
Anticoagulant/Antiplatelet Drugs
Theoretically, grape extracts may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
In vitro evidence suggests that grape extracts might decrease platelet aggregation.
Cyclosporine (Neoral, Sandimmune)
Ingesting grape juice with cyclosporine can reduce cyclosporine absorption.
A small pharmacokinetic study in healthy young adults shows that intake of purple grape juice 200 mL along with cyclosporine can decrease the absorption of cyclosporine by up to 30% when compared with water. Separate doses of grape juice and cyclosporine by at least 2 hours to avoid this interaction.
Cytochrome P450 1A2 (Cyp1A2) Substrates
Theoretically, grape juice might reduce the levels of CYP1A2 substrates.
A small pharmacokinetic study in healthy adults shows that ingestion of 200 mL of grape juice decreases phenacetin plasma levels. This is thought to be due to induction of CYP1A2.
Cytochrome P450 2D6 (Cyp2D6) Substrates
Theoretically, grape seed extract may increase the levels of CYP2D6 substrates.
In vitro evidence suggests that grape seed extract might inhibit CYP2D6 enzymes. However, this interaction has not been reported in humans.
Cytochrome P450 2E1 (Cyp2E1) Substrates
Theoretically, grape seed extract might increase the levels of CYP2E1 substrates.
In vitro and animal research suggests that grape seed proanthocyanidin extract inhibits CYP2E1 enzymes. However, this interaction has not been reported in humans.
Cytochrome P450 3A4 (Cyp3A4) Substrates
It is unclear if grape seed extract inhibits or induces CYP3A4; research is conflicting.
In vitro evidence suggests that grape seed extract might inhibit CYP3A4 enzymes. However, evidence from animal research shows that grape seed extract may induce CYP3A4 in the liver. So far, these interactions have not been reported in humans.
Midazolam (Versed)
Theoretically, long-term intake of grape seed extract might decrease the effects of midazolam.
Animal research shows that subchronic ingestions of grape seed extract can increase the elimination of intravenous midazolam by increasing hepatic CYP3A4 activity. Single doses of grape seed extract do not appear to affect midazolam elimination.
Phenacetin
Grape juice might decrease phenacetin absorption.
A small pharmacokinetic study in healthy adults shows that ingestion of 200 mL of grape juice decreases phenacetin plasma levels. This is thought to be due to induction of cytochrome P450 1A2 (CYP1A2).
Cytochrome P450 2C9 (Cyp2C9) Substrates
It is unclear if grape juice or grape seed extract inhibits CYP2C9; research is conflicting.
In vitro evidence shows that grape seed extract or grape juice might inhibit CYP2C9 enzymes. However, a small pharmacokinetic study in healthy adults shows that drinking 8 ounces of grape juice once does not affect the clearance of flurbiprofen, a probe-drug for CYP2C9 metabolism. The effects of continued grape juice consumption are unclear.
Brand information
Manufacturer and brand details for Grape Seed Extract 200 mg, from the product label.
BulkSupplements.com
See all BulkSupplements.com products- Name
- BulkSupplements.com
- Street Address
- 7511 Eastgate Road
- City
- Henderson
- State
- NV
- ZipCode
- 89011
- Web Address
- BulkSupplements.com
Grape Seed Extract 200 mg by BulkSupplements.com: Common Questions
Does Grape Seed Extract 200 mg by BulkSupplements.com 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 pregnant or breastfeeding?
What does grape seed extract actually do?
What side effects should I watch for?
Are there any fillers in these capsules?
I'm on a blood thinner. Can I take this?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Grape Seed Extract 200 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 Grape Seed Extract 200 mg’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Grape Seed Extract 200 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 34 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.
Grape 34 references
- Kiesewetter H, Koscielny J, Kalus U, et al. Efficacy of orally administered extract of red vine leaf AS 195 (folia vitis viniferae) in chronic venous insufficiency (stages I-II). A randomized, double-blind, placebo-controlled trial. Arzneimittelforschung
- Xiao Dong S, Zhi Ping Z, Zhong Xiao W, et al. Possible enhancement of the first-pass metabolism of phenacetin by ingestion of grape juice in Chinese subjects. Br J Clin Pharmacol 1999;48:638-40. PubMed
- Vaswani SK, Hamilton RG, Carey RN, et al. Anaphylaxis recurrent urticaria and angioedema from grape hypersensitivity. J Allergy Clin Immunol 1998;101:S31.
- Chevallier A. The Encyclopedia of Medicinal Plants. London, UK: Dorling Kindersley, Ltd., 1996.
- Bernstein DI, Bernstein CK, Deng C, et al. Evaluation of the clinical efficacy and safety of grapeseed extract in the treatment of fall seasonal allergic rhinitis: a pilot study. Ann Allergy Asthma Immunol 2002;88:272-8.. PubMed
- Greenblatt DJ, von Moltke LL, Perloff ES, et al. Interaction of flurbiprofen with cranberry juice, grape juice, tea, and fluconazole: in vitro and clinical studies. Clin Pharmacol Ther 2006;79:125-33. PubMed
- Ward NC, Hodgson JM, Croft KD, et al. The combination of vitamin C and grape-seed polyphenols increases blood pressure: a randomized, double-blind, placebo-controlled trial. J Hypertens 2005;23:427-34.. PubMed
- Ray, S. D., Parikh, H., Hickey, E., Bagchi, M., and Bagchi, D. Differential effects of IH636 grape seed proanthocyanidin extract and a DNA repair modulator 4-aminobenzamide on liver microsomal cytochrome 4502E1-dependent aniline hydroxylation. Mol Cell B PubMed
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