Drug & supplement interaction

Arabinoxylan + Olaparib

Olaparib brand name: Lynparza.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 20, 2026
The bottom line No known interaction

We found no known interaction between Arabinoxylan and Olaparib in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first. Additionally, although there is no interaction, the two are separately associated with some of the same side effects, which would make a new symptom harder to attribute to one or the other.

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Interaction report

Arabinoxylan and Olaparib

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Olaparib and Arabinoxylan in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Arabinoxylan safety at a glance

Arabinoxylan overall Use caution Generally considered well tolerated as a food-derived fiber, but high-quality long-term safety data are limited.
Pregnancy Use caution Not enough reliable data on supplement use; stick to fiber from normal foods unless your provider advises otherwise.
Breastfeeding Use caution There is little safety information for supplements while breastfeeding, so caution is advised.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Olaparib and Arabinoxylan? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Olaparib

Interactions in our licensed database are recorded against drug classes, not just single drug names. Olaparib is filed under 2 classifications — cytochrome p450 3a4 (cyp3a4) substrates, oral drugs. Arabinoxylan has documented interactions with 1 drug class — the most serious being antidiabetes drugs (moderate) — and none of Olaparib’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Arabinoxylan Does Interact With Other Medications

Arabinoxylan has 86 moderate known drug interactions in our database — Olaparib isn’t one of them. If you take anything else, check it against the full list below.

Moderate 86 No known interaction 2,744 (incl. Olaparib)
Taking anything else?

Check Another of Your Medications Against Arabinoxylan

Covers the 2,830 medications we’ve checked against Arabinoxylan. Pick one to open its full report.

What to actually watch for

No Interaction Found — But Data Suggests Arabinoxylan and Olaparib May Share Several of the Same Side Effects

This is not an interaction. Neither one changes how your body handles the other, and nothing here says they react together. What our sources do show is that each has separately been linked to the effects below — so taking both can make those effects more likely to turn up, and harder to pin on one or the other if they do.

  • Bloating or gas / Stomach pain / Diarrhea Additional detail

    Arabinoxylan

    “Orally, arabinoxylan seems to be well tolerated. Some adverse effects reported in clinical trials include diarrhea, gas, bloating, and abdominal pain.”

    Arabinoxylan · Natural Medicines adverse-effect record, reported in diarrhea.

    3 sources cited
    1. 25664. Grasten S, Liukkonen K-H, Chrevatidis A, et al. Effects of wheat pentosan and inulin on the metabolic activity of fecal microbiota and on bowel function in healthy humans. Nutrition Res 2003;23:1503-14. DOI
    2. 99677. François IE, Lescroart O, Veraverbeke WS, et al. Effects of a wheat bran extract containing arabinoxylan oligosaccharides on gastrointestinal health parameters in healthy adult human volunteers: a double-blind, randomised, placebo-controlled, cross-over t
    3. 99680. Scarpellini E, Deloose E, Vos R, et al, The effect of arabinoxylooligosaccharides on gastric sensory-motor function and nutrient tolerance in man. Neurogastroenterol Motil. 2016 Aug;28(8):1194-203. PubMed

    “Orally, arabinoxylan can cause gastrointestinal adverse effects such as diarrhea, gas, bloating, and abdominal pain.”

    Arabinoxylan · Natural Medicines adverse-effect record, reported in diarrhea.

    3 sources cited
    1. 25664. Grasten S, Liukkonen K-H, Chrevatidis A, et al. Effects of wheat pentosan and inulin on the metabolic activity of fecal microbiota and on bowel function in healthy humans. Nutrition Res 2003;23:1503-14. DOI
    2. 99677. François IE, Lescroart O, Veraverbeke WS, et al. Effects of a wheat bran extract containing arabinoxylan oligosaccharides on gastrointestinal health parameters in healthy adult human volunteers: a double-blind, randomised, placebo-controlled, cross-over t
    3. 99680. Scarpellini E, Deloose E, Vos R, et al, The effect of arabinoxylooligosaccharides on gastric sensory-motor function and nutrient tolerance in man. Neurogastroenterol Motil. 2016 Aug;28(8):1194-203. PubMed

    Olaparib

    Listed in the ADVERSE REACTIONS section of the FDA label for Olaparib. Read the label on DailyMed ›

Effects for Olaparib come from the ADVERSE REACTIONS section of its FDA label; effects for Arabinoxylan come from the Natural Medicines adverse-effect record, quoted above. Where a percentage is shown, it is the share of 20,798 voluntary FDA FAERS reports for Olaparib that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

Everything else you take

See Every Supplement That Interacts With Olaparib

This page covers Arabinoxylan only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Olaparib page lists 138 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Grapefruit (major), St. John's Wort (major), Acacia Rigidula (moderate) and Adrafinil (moderate).

By severity: 3 major · 94 moderate · 41 minor.

From our pharmacist’s overview on the Olaparib page

“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.”

Reviewed by 2 · Jul 18, 2026

Open the Olaparib interaction page

One more smart check

Taking Arabinoxylan as Part of a Dietary Supplement Product? Check It for Interactions

We hold 1 real supplement products containing Arabinoxylan, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Arabinoxylan. Even though Arabinoxylan itself has no known interaction with Olaparib, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Arabinoxylan and Olaparib Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Arabinoxylan
Steady interest

#1,008 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Olaparib
Top half

#1,136 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Where does our data come from?
  • Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Arabinoxylan reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Arabinoxylan and Olaparib records this page draws on were last updated July 10, 2026.
  • What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
Data structure & sourcing designed and verified by .
Supplement

About Arabinoxylan

What is Arabinoxylan?

Arabinoxylan
  • Blood sugar support
  • Digestive and gut health (prebiotic)
  • Cholesterol and triglyceride support
  • Immune support
  • Metabolic syndrome

Arabinoxylan is a type of dietary fiber found in cereal grains that acts as a prebiotic and may modestly affect blood sugar and blood fats. The evidence for most uses is early and limited, so it should not replace proven treatments. If you are considering it, talk with your pharmacist or doctor first.

Fiber extracted from the cell walls of cereal grains (such as wheat bran, rice bran, corn, rye, oat, and barley) · Powder, capsules, and a modified rice-bran product known as MGN-3 (Biobran)

An interaction check asks whether these two react with each other — it does not ask whether Arabinoxylan is a good idea for someone in your situation. Here is what our Arabinoxylan record says about it on its own.

Arabinoxylan: dosing

There is no official or standardized dose of arabinoxylan, and amounts used in studies have varied widely depending on the product and the goal.The best approach is to follow the directions on the specific product label and to start low and increase slowly to limit gas and bloating.

From our Arabinoxylan monograph — the full record covers uses, side effects and every documented interaction.

Read the full Arabinoxylan monograph & all interactions
Medication

About Olaparib

What Is Olaparib Used For?

Brand name: Lynparza

Lynparza (olaparib) is used to treat adults with certain ovarian, fallopian tube, or primary peritoneal cancers that carry BRCA or other DNA-repair gene mutations — both as a maintenance therapy after platinum-based chemotherapy (including in combination with bevacizumab for some patients) and for recurrent disease. It is also approved for HER2-negative breast cancer with a germline BRCA mutation, both in early high-risk disease (adjuvant setting) and in metastatic disease.

Lynparza is additionally used as maintenance therapy for adults with germline BRCA-mutated metastatic pancreatic adenocarcinoma whose disease has not progressed on first-line platinum-based chemotherapy, and for adults with certain gene-mutated metastatic castration-resistant prostate cancer — either alone (after prior enzalutamide or abiraterone) or in combination with abiraterone and prednisone or prednisolone. All uses require testing for specific genetic mutations using an FDA-approved companion diagnostic before starting treatment.

Most-Reported Side Effects for Olaparib

From FAERS, the FDA’s public side-effect reporting system (20,798 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Malignant neoplasm progression 2,063 reports
Nausea 1,827 reports
Fatigue 1,762 reports
Anemia 1,622 reports
Vomiting 724 reports
See full Olaparib drug information
Keep checking

Other Drugs & Arabinoxylan

Browse every other medication we’ve checked against Arabinoxylan — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
86Moderate
0Minor
2,743No known interaction
86 Moderate 2,743 No interaction
Moderate

86 interactions

Showing 60 of 86 moderate interactions — see all 86 on the Arabinoxylan page.

No interaction 2,743 drugs checked — show the list

We also checked Arabinoxylan against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,743 medications checked with no known interaction — see the full Arabinoxylan list.

See the full Arabinoxylan interactions page
See every supplement checked against Olaparib, ranked by severity
Evidence & sources

Arabinoxylan References

The 8 references that drive our Arabinoxylan monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  1. Grasten S, Liukkonen K-H, Chrevatidis A, et al. Effects of wheat pentosan and inulin on the metabolic activity of fecal microbiota and on bowel function in healthy humans. Nutrition Res 2003;23:1503-14. DOI
  2. Lu ZX, Walker KZ, Muir JG, Mascara T, O'Dea K. Arabinoxylan fiber, a byproduct of wheat flour processing, reduces the postprandial glucose response in normoglycemic subjects. Am J Clin Nutr 2000;71(5):1123-1128.
  3. Lu ZX, Walker KZ, Muir JG, O'Dea K. Arabinoxylan fibre improves metabolic control in people with Type II diabetes. Eur J Clin Nutr 2004;58(4):621-8. PubMed
  4. Garcia AL, Otto B, Reich SC, et al. Arabinoxylan consumption decreases postprandial serum glucose, serum insulin and plasma total ghrelin response in subjects with impaired glucose tolerance. Eur J Clin Nutr 2007;61(3):334-41. PubMed
  5. Garcia AL, Steiniger J, Reich SC, et al. Arabinoxylan fibre consumption improved glucose metabolism, but did not affect serum adipokines in subjects with impaired glucose tolerance. Horm Metab Res 2006;38(11):761-766. PubMed
  6. François IE, Lescroart O, Veraverbeke WS, et al. Effects of a wheat bran extract containing arabinoxylan oligosaccharides on gastrointestinal health parameters in healthy adult human volunteers: a double-blind, randomised, placebo-controlled, cross-over t
  7. Schioldan AG, Gregersen S, Hald S, et al. Effects of a diet rich in arabinoxylan and resistant starch compared with a diet rich in refined carbohydrates on postprandial metabolism and features of the metabolic syndrome. Eur J Nutr. 2018 Mar;57(2):795-807. PubMed
  8. Scarpellini E, Deloose E, Vos R, et al, The effect of arabinoxylooligosaccharides on gastric sensory-motor function and nutrient tolerance in man. Neurogastroenterol Motil. 2016 Aug;28(8):1194-203. PubMed

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Taking Arabinoxylan and Olaparib Together: Common Questions

Is it safe to take Arabinoxylan with Olaparib?
We do not list a known interaction between Arabinoxylan and Olaparib. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
Do Arabinoxylan and Olaparib have any of the same side effects?
Yes — our sources link each of them separately to 3 of the same effects. That is not an interaction: neither changes how your body handles the other. It does mean that if one of those effects turns up, it can be harder to tell which one is behind it. They are listed on this page with the source behind each.
How was the Arabinoxylan and Olaparib combination checked?
Interactions in our licensed database are recorded against drug classes. Olaparib is filed under 2 classifications, and Arabinoxylan has documented interactions with 1 drug class — none of Olaparib's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does Arabinoxylan interact with any other medications?
Yes. Arabinoxylan has 86 documented drug interactions in our database — Olaparib is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does Olaparib interact with any supplements?
Yes. Olaparib has documented interactions with 138 supplements in our database — Arabinoxylan is not one of them. The Olaparib interaction page linked on this page lists every one, ranked by severity.

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

Where next

Keep Exploring

Arabinoxylan monograph Uses, safety profile, and every drug interaction in one place Olaparib drug information The full plain-English guide to this medication Olaparib supplement interactions Every supplement checked against Olaparib, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 8 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Olaparib and Arabinoxylan?

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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.