Medication interaction hub

What Supplements Interact with Olaparib?

Olaparib brand name: Lynparza. Every interaction below applies to the brands too.

138 Interactions 3 Major 94 Moderate 41 Minor
Curated & coded by · Clinical Pharmacist · Updated September 22, 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 Olaparib? 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 Olaparib 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.

Grapefruit is the first thing to drop if you take Olaparib (Lynparza). It blocks CYP3A4, the liver enzyme that clears this cancer drug, so levels can climb and side effects with them. That enzyme explains most of this page, since 121 of the 138 ingredients on file act on CYP3A4, some pushing Olaparib levels up, others, like St. John's wort, speeding its breakdown so it may work less well. On a cancer treatment, either direction deserves genuine care.

Only three entries are rated major: grapefruit, St. John's wort, and activated charcoal, which can soak up the pill before it absorbs. A separate group of 17 can blunt the absorption of any oral drug; space those well away from your dose. The remaining 94 moderate and 41 minor entries mostly echo the enzyme story with weaker evidence, which is why the three major entries deserve your attention first.

— , Clinical Pharmacist · July 18, 2026

Major 3 Moderate 94 Minor 41 No known interaction 1,314

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

Olaparib: Top Interactions at a Glance

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

Showing the 12 highest-ranked of 138 interacting ingredients — plus 1,314 more checked with no known interaction. See the complete ranked list.

Start here

The Major Interactions to Know About

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

Major Likelihood Likely Grapefruit + Olaparibi

Grapefruit juice can increase levels of drugs metabolized by CYP3A4.

Read the full interaction Major Likelihood Probable Activated Charcoal + Olaparibi

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 + Olaparibi

St.

Read the full interaction
The complete list

Every Supplement Checked Against Olaparib

All 1,452 ingredients in our database, ranked by severity — 138 with a Olaparib interaction on file and 1,314 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 Olaparib?

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 Cubebs with Olaparib?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Several compounds isolated from cubebs can inhibit cytochrome P450 3A4 (CYP3A4) in vitro.

Full Cubebs + Olaparib answer

Can you take Danshen with Olaparib?

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

Full Danshen + Olaparib answer

Can you take Devil's Claw with Olaparib?

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

Full Devil's Claw + Olaparib answer

Can you take Dhea with Olaparib?

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

Full Dhea + Olaparib answer

Can you take Diosmin with Olaparib?

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

Full Diosmin + Olaparib answer

Can you take Echinacea with Olaparib?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Echinacea may induce hepatic CYP3A4 and inhibit intestinal CYP3A4.

Full Echinacea + Olaparib answer

Can you take Eucalyptus with Olaparib?

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

Full Eucalyptus + Olaparib answer

Can you take European Barberry with Olaparib?

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

Full European Barberry + Olaparib answer

Can you take Evodia with Olaparib?

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

Full Evodia + Olaparib answer

Can you take False Unicorn with Olaparib?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. In vitro, false unicorn extract inhibits cytochrome P450 3A4 (CYP3A4) activity.

Full False Unicorn + Olaparib answer

Can you take Fennel with Olaparib?

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

Full Fennel + Olaparib answer

Can you take Feverfew with Olaparib?

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

Full Feverfew + Olaparib answer

Can you take Fo-ti with Olaparib?

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

Full Fo-ti + Olaparib answer

Can you take Garlic with Olaparib?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, garlic products containing allicin might induce intestinal CYP3A4 and inhibit hepatic CYP3A4.

Full Garlic + Olaparib answer

Can you take German Chamomile with Olaparib?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, German chamomile might inhibit CYP3A4 and increase levels of drugs metabolized by these enzymes.

Full German Chamomile + Olaparib answer

Can you take Ginger with Olaparib?

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

Full Ginger + Olaparib answer

Can you take Ginkgo with Olaparib?

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

Full Ginkgo + Olaparib answer

Can you take Goji with Olaparib?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, goji berry might inhibit CYP3A4 and reduce metabolism of CYP3A4 substrates.

Full Goji + Olaparib answer

Can you take Goldenseal with Olaparib?

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

Full Goldenseal + Olaparib answer

Can you take Goldthread with Olaparib?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. There's very preliminary evidence that berberine, a constituent of goldthread, might inhibit cytochrome P450 3A4 (CYP3A4) enzyme.

Full Goldthread + Olaparib 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) Olaparib is classified into the pharmacology categories it belongs to, (2) every supplement interaction documented against any of those categories is inherited by Olaparib, 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.

Olaparib sits in 2 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 Olaparib 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 Olaparib through this category.

About Olaparib

Olaparib is a targeted cancer medicine used to treat certain types of ovarian, breast, pancreatic, and prostate cancers in adults with specific genetic mutations.

Generic name: Olaparib  ·  Brand name: Lynparza.

See the full Olaparib drug information
Check a real product

Take a Supplement Product? Check the Whole Bottle Against Olaparib

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 Olaparib.

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Pharmacist Counseling Corner

Olaparib & Supplements: Common Questions

What supplements interact with Olaparib?
In our interaction database, 138 supplement and herbal ingredients have an interaction with Olaparib on file — 3 rated major, 94 moderate, and 41 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 Olaparib 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 Olaparib?
That depends entirely on which supplement. The honest answer for Olaparib 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 Lynparza have the same supplement interactions as Olaparib?
Yes — Lynparza all contain Olaparib, 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 Olaparib and my other medications?
This page covers Olaparib against supplements and herbal ingredients. Checking Olaparib 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 Olaparib 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 September 22, 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.