Medication interaction hub

What Supplements Interact with Vincristine?

Vincristine brand name: Vincasar. Every interaction below applies to the brands too.

148 Interactions 3 Major 108 Moderate 37 Minor
Curated & coded by · Clinical Pharmacist · Updated October 1, 2026

Drug–supplement interaction data sourced from Natural Medicines Pro, the licensed clinical database from TRC Healthcare / Therapeutic Research, with additional analysis by the HelloPharmacist Pharmacist Team. Our sources · Editorial policy

What is this page for?

One answer, for one medication: what supplements and herbal products interact with Vincristine? Every vitamin, herb, and supplement ingredient we’ve checked against it is on this page, ranked by severity, each linking to the full report for that exact pair.

This page covers supplement interactions only — to check Vincristine against your other medications, use the drug–drug interaction checker. Educational information from our licensed clinical databases, not medical advice. Our editorial policy

HelloPharmacist Bottom Line
Our Pharmacist Explains
What is this? The interaction data in the HelloPharmacist supplement database is licensed from Natural Medicines Pro by TRC Healthcare (Therapeutic Research). HelloPharmacist pharmacists often add our own analysis and context on top of that licensed data — such as this Bottom Line summary and the notes on individual interaction pages — and any such commentary is noted as ours.

Because vincristine (Vincasar) is chemotherapy, used against leukemias, lymphomas, and several other cancers, the interactions on this page deserve genuine caution, starting with the three rated major. Nearly all of these supplements change how the body clears vincristine, through the CYP3A4 enzyme or the P-glycoprotein transporter, which can push its levels high enough to worsen nerve damage and blood-count problems, or drop them low enough to weaken the treatment. Grapefruit and St. John's wort head the list, and activated charcoal can pull the drug out of circulation even though vincristine is given by IV.

A small group can also make seizures more likely, a risk this drug already carries. Anything herbal belongs in a conversation with the oncology team first. All told, 148 ingredients are on file, three major, 108 moderate, 37 minor.

— , Clinical Pharmacist · July 18, 2026

Major 3 Moderate 108 Minor 37 No known interaction 1,304

This box checks one ingredient at a time (like turmeric or magnesium). Taking a supplement product with a whole label of ingredients? Search the product instead — we check every ingredient on it ↓

Top Ingredient Interactions

Vincristine: Top Interactions at a Glance

The most significant Vincristine supplement & herbal interactions, colored by severity. Tap any ingredient to open the full report for that pair.

Showing the 12 highest-ranked of 148 interacting ingredients — plus 1,304 more checked with no known interaction. See the complete ranked list.

Start here

The Major Interactions to Know About

The most clinically significant Vincristine + supplement combinations in our database, best-documented first. Open any card for the full report.

Major Likelihood Likely Grapefruit + Vincristinei

Grapefruit juice can increase levels of drugs metabolized by CYP3A4.

Read the full interaction Major Likelihood Probable Activated Charcoal + Vincristinei

Activated charcoal reduces systemic exposure to many drugs, including those that undergo enterohepatic recirculation, regardless of the route of administration.

Read the full interaction Major Likelihood Probable St. John's Wort + Vincristinei

St.

Read the full interaction
The complete list

Every Supplement Checked Against Vincristine

All 1,452 ingredients in our database, ranked by severity — 148 with a Vincristine interaction on file and 1,304 with none found. Filter by severity or search any ingredient; hover the for what each ingredient is.

Looking for an interaction with a specific supplement product? Search products instead ↓

Straight answers

Can You Take It With Vincristine?

One-line answers, one card per combination — scroll through today’s 20 and tap any card for the full report. A different set rotates in daily until every combination has had its turn.

Can you take Turmeric with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Turmeric might increase or decrease levels of drugs metabolized by CYP3A4.

Full Turmeric + Vincristine answer

Can you take Chanca Piedra with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, use of chanca piedra might increase the levels and clinical effects of CYP3A4 substrates.

Full Chanca Piedra + Vincristine answer

Can you take Quercetin with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use might alter the effects and adverse effects of CYP3A4 substrates.

Full Quercetin + Vincristine answer

Can you take Activated Charcoal with Vincristine?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Activated charcoal reduces systemic exposure to many drugs, including those that undergo enterohepatic recirculation, regardless of the rout...

Full Activated Charcoal + Vincristine answer

Can you take St. John's Wort with Vincristine?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. St.

Full St. John's Wort + Vincristine answer

Can you take Cannabidiol (cbd) with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Cannabidiol may increase levels of drugs that are metabolized by CYP3A4.

Full Cannabidiol (cbd) + Vincristine answer

Can you take Coffee Charcoal with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Coffee charcoal can reduce the absorption of orally administered drugs and should be separated from oral drug administration by at least two...

Full Coffee Charcoal + Vincristine answer

Can you take European Mandrake with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concurrent use might increase absorption of some drugs because of inhibited gastrointestinal (GI) motility caused by European...

Full European Mandrake + Vincristine answer

Can you take Glucomannan with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, glucomannan may decrease absorption of drugs taken orally.

Full Glucomannan + Vincristine answer

Can you take Goldenseal with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, goldenseal might increase or decrease serum levels of P-glycoprotein (P-gp) substrates.

Full Goldenseal + Vincristine answer

Can you take Guggul with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, guggul might reduce the effects of CYP3A4 substrates.

Full Guggul + Vincristine answer

Can you take Schisandra with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Schisandra can increase the levels and clinical effects of drugs metabolized by CYP3A4.

Full Schisandra + Vincristine answer

Can you take Tree Turmeric with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, tree turmeric might increase the levels and clinical effects of drugs that are substrates of CYP3A4.

Full Tree Turmeric + Vincristine answer

Can you take Acacia Rigidula with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, Acacia rigidula products that are adulterated with beta-methylphenylethylamine (BMPEA) might increase the levels of CYP3A4 su...

Full Acacia Rigidula + Vincristine answer

Can you take Adrafinil with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, adrafanil might reduce levels and clinical effects of CYP3A4 substrates.

Full Adrafinil + Vincristine answer

Can you take African Wild Potato with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. In vitro evidence shows that African wild potato extract can inhibit cytochrome P450 3A4 (CYP3A4) enzyme activity by up to 86%.

Full African Wild Potato + Vincristine answer

Can you take American Elder with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking American elder might increase levels of CYP3A4 substrates.

Full American Elder + Vincristine answer

Can you take Astaxanthin with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, astaxanthin may decrease levels of drugs metabolized by CYP3A4.

Full Astaxanthin + Vincristine answer

Can you take Ayahuasca with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, ayahuasca might increase plasma concentrations of CYP3A4 substrates.

Full Ayahuasca + Vincristine answer

Can you take Bacopa with Vincristine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, bacopa might increase the levels and adverse effects of CYP3A4 substrates.

Full Bacopa + Vincristine answer
Read the list like a pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

  • Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
  • Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
  • Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
  • No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

  • Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
  • Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
  • Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

  • Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
  • Each entry links to a full report with the clinical detail, likelihood, evidence level, and citations for that exact combination.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

How Does Our Interaction Checker Work?

Behind every verdict on this page is a category system. Our source database doesn’t document supplement interactions drug-by-drug — it documents them against groups of medications that behave the same way (for example, “drugs processed by the CYP3A4 liver enzyme” or “blood-thinning medications”).

So the check works in three steps: (1) Vincristine is classified into the pharmacology categories it belongs to, (2) every supplement interaction documented against any of those categories is inherited by Vincristine, and (3) each ingredient keeps its own severity, likelihood, and evidence grades from the underlying record. That’s why one supplement can carry several records for one drug — it may interact through more than one category.

Vincristine sits in 4 interaction categories. Open any one to see what the group means:

Cytochrome P450 3A4 (Cyp3A4) Substrates 121 ingredients

A drug-metabolism group: these medications are processed by the named liver enzyme (a cytochrome P450). Supplements that speed this enzyme up or slow it down can lower or raise the medication's levels in your body.

121 of the supplement ingredients on this page reach Vincristine through this category.

P-Glycoprotein Substrates 37 ingredients

A drug-transport group: these medications are moved in and out of cells by the P-glycoprotein pump. Supplements that affect the pump can change how much of the drug is absorbed or kept in the body.

37 of the supplement ingredients on this page reach Vincristine through this category.

Oral Drugs 17 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

17 of the supplement ingredients on this page reach Vincristine through this category.

Seizure Threshold Lowering Drugs 6 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

6 of the supplement ingredients on this page reach Vincristine through this category.

About Vincristine

Vincristine Injection is an intravenous (into a vein) chemotherapy medicine used for acute leukemia and, with other cancer drugs, for several lymphomas and childhood tumors.

Generic name: Vincristine  ·  Brand name: Vincasar.

See the full Vincristine Injection drug information
Check a real product

Take a Supplement Product? Check the Whole Bottle Against Vincristine

Most supplements are combination products — and the interaction may come from an ingredient you didn’t buy it for. Search any product below (or scan its label) and we’ll check every ingredient on it against Vincristine.

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Pharmacist Counseling Corner

Vincristine & Supplements: Common Questions

What supplements interact with Vincristine?
In our interaction database, 148 supplement and herbal ingredients have an interaction with Vincristine on file — 3 rated major, 108 moderate, and 37 minor. That number sounds scarier than it is: severity matters far more than the count, which is why the list on this page is ranked instead of alphabetical. Start at the top. The highest-ranked right now: Grapefruit, Activated Charcoal, St. John's Wort.
Which Vincristine supplement interactions are the most serious?
Focus on the major group: Grapefruit, Activated Charcoal and St. John's Wort. A major rating means the combination can be clinically significant, not that harm is guaranteed — but it's exactly the kind of thing to run past your pharmacist before your next dose, not after. Jump to the ranked list.
Can I take vitamins or supplements while on Vincristine?
That depends entirely on which supplement. The honest answer for Vincristine is in the ranked list above — and if what you take is a combination product with a dozen ingredients, don't check them one by one: photograph the label with our scanner and we'll check the whole thing at once. Try the label scanner or the interaction checker.
Do brands like Vincasar have the same supplement interactions as Vincristine?
Yes — Vincasar all contain Vincristine, so everything on this page applies to them equally. Interactions belong to the active drug, never to the brand on the box; the same is true of generics.
Where do these interaction ratings come from?
Every rating comes from the Natural Medicines database — the same evidence-graded reference pharmacists and hospitals use — and each interaction carries three separate grades: severity (how bad it can be), likelihood (how well it's documented in studies and case reports), and an evidence level. Our pharmacists review the content; we never let an AI decide an interaction. See how to read the ratings and our editorial policy.
What about Vincristine and my other medications?
This page covers Vincristine against supplements and herbal ingredients. Checking Vincristine against your other prescription or OTC medications is a different tool — our drug interaction checker covers that side. Head to the drug–drug interaction checker, or read the full Vincristine Injection drug information.

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

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Sourcing

Where This Data Comes From — and Why You Can Trust It

🧪 Licensed clinical database

Every interaction verdict on this page comes from Natural Medicines Pro (TRC Healthcare / Therapeutic Research) — the same evidence-graded reference used by pharmacists and hospitals. We license this data directly; we do not scrape it, and no AI invents an interaction.

🧑‍⚕️ Pharmacist review

This page is curated and coded by , Clinical Pharmacist, with additional analysis by the HelloPharmacist Pharmacist Team. Editorial commentary is ours; the licensed interaction records are shown as sourced.

🔄 Kept current

Our interaction database refreshes on a weekly cycle, and this page re-checks the live database every time it’s rebuilt — what you see reflects the database as of October 1, 2026.

🔍 Full transparency

How every dataset on this site is sourced, licensed, and updated is documented publicly: our data sources · editorial policy · how we use AI.

Educational information, not medical advice. An interaction being on file does not mean it will happen to you — and absence of one is not proof of safety. Never start or stop a medication or supplement without talking to your pharmacist or doctor.