Drug & supplement interaction

Black Psyllium + Docetaxel

Docetaxel brand name: Taxotere.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between Black Psyllium and Docetaxel 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

Black Psyllium and Docetaxel

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 Docetaxel and Black Psyllium 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.

Black Psyllium safety at a glance

Black Psyllium overall Use caution Generally well tolerated when taken with enough water, but it can cause choking or blockage if fluids are inadequate.
Pregnancy Likely Safe When used orally with appropriate fluid intake. Read the full pregnancy detail
Breastfeeding Likely Safe When used orally with appropriate fluid intake. Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Docetaxel and Black Psyllium? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Docetaxel

Interactions in our licensed database are recorded against drug classes, not just single drug names. Docetaxel is filed under 2 classifications — including cytochrome p450 3a4 (cyp3a4) substrates. Black Psyllium has documented interactions with 7 drug classes — the most serious being carbamazepine (tegretol) (moderate), lithium (moderate) and metformin (glucophage) (moderate) — and none of Docetaxel’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

Black Psyllium Does Interact With Other Medications

Black Psyllium has 23 moderate, 2,002 minor known drug interactions in our database — Docetaxel isn’t one of them. If you take anything else, check it against the full list below.

Moderate 23 Minor 2,002 No known interaction 805 (incl. Docetaxel)
Taking anything else?

Check Another of Your Medications Against Black Psyllium

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

What to actually watch for

No Interaction Found — But Data Suggests Black Psyllium and Docetaxel May Share a Side Effect

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. One of them is worth acting on rather than waiting out — marked below.

  • An allergic reaction Worth acting on Additional detail

    Black Psyllium

    “Several psyllium species have been associated with sensitization and allergic reactions, especially in people exposed to airborne psyllium dust, such as nurses preparing doses of psyllium powder, and workers in psyllium processing plants. Symptoms of occupational exposure include rhinitis, conjunctivitis, wheezing, asthma, and urticarial rashes (18,93214).”

    Black Psyllium · Natural Medicines adverse-effect record, reported in asthma.

    5 sources cited
    1. 93214. Semen plantaginis in: WHO Monographs on Selected Medicinal Plants, volume 1. World Health Organization, Geneva, 1999. Available at http://apps.who.int/medicinedocs/en/d/Js2200e/. Accessed November 26, 1026.
    2. 18. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
    3. 2329. Vaswani SK, Hamilton RG, Valentine MD, Adkinson NF. Psyllium laxative-induced anaphylaxis, asthma, and rhinitis. Allergy 1996;51:266-8. PubMed
    4. 8079. Lantner RR, Espiritu BR, Zumerchik P, Tobin MC. Anaphylaxis following ingestion of a psyllium-containing cereal. JAMA 1990;264:2534-6. DOI
    5. 9246. Kaplan MJ. Anaphylactic reaction to "Heartwise." N Engl J Med 1990;323:1072-3. DOI

    Docetaxel

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

Reported for Black Psyllium but not commonly for Docetaxel: a bowel blockage, bloating or gas, wheezing and a stuffy or runny nose.

Effects for Docetaxel come from the ADVERSE REACTIONS section of its FDA label; effects for Black Psyllium come from the Natural Medicines adverse-effect record, quoted above. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

Special populations

Black Psyllium in Pregnancy & Breastfeeding

Pregnancy And Lactation Likely Safe

When used orally with appropriate fluid intake.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center

Overlapping uses

What Docetaxel Is Prescribed For, and What Black Psyllium Has Been Studied For

These two come up together because they touch the same health topic — not because they do the same job. Docetaxel is a prescription medicine with approved uses on its FDA label. Black Psyllium is a supplement: what follows is what researchers have looked at it for, and how strong that evidence is.

Docetaxel is prescribed for: Docetaxel Injection is used to treat a number of serious cancers. Beizray (docetaxel injection) is approved as a single agent for locally advanced or metastatic breast cancer after prior chemotherapy has stopped working, and in combination with doxorubicin and cyclophosphamide as adjuvant (after-surgery) treatment for operable node-positive breast cancer. It is also used as a single agent for locally advanced or metastatic non-small cell lung cancer (NSCLC) after platinum-based chemotherapy has failed, and with cisplatin for chemotherapy-naive advanced NSCLC. Beizray is used with prednisone for metastatic castration-resistant prostate cancer.

Read the rest of what Docetaxel is prescribed for

It is also used with cisplatin and fluorouracil for advanced gastric adenocarcinoma (including gastroesophageal junction cancer) in patients who have not received prior chemotherapy for advanced disease, and for induction treatment of locally advanced squamous cell carcinoma of the head and neck (SCCHN).

Black Psyllium has been studied for:

  • Cancer studied, not established Black Psyllium has been studied for this. Natural Medicines rates the evidence: Insufficient Reliable Evidence To Rate Read what the research shows

    Black Psyllium for cancer

    Although there has been interest in using oral black psyllium for cancer, there is insufficient reliable information about the clinical effects of black psyllium for this purpose.

Effectiveness ratings and the research summaries above are the verbatim record from the Natural Medicines database, which grades evidence from “Effective” down to “Insufficient Reliable Evidence To Rate”. A rating below the top of that scale means researchers have looked at it — not that it works, and never that it can stand in for a prescribed medicine. Do not stop or replace Docetaxel on your own; if you are taking Black Psyllium for the same health topic, tell your prescriber, especially if the medicine is being adjusted to a target.

Everything else you take

See Every Supplement That Interacts With Docetaxel

This page covers Black Psyllium only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Docetaxel page lists 121 supplements it has a documented interaction with, worst first, each one explained.

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

By severity: 2 major · 87 moderate · 32 minor.

From our pharmacist’s overview on the Docetaxel page

“Grapefruit is the first thing I would take off the menu during docetaxel (Taxotere) chemotherapy. It blocks CYP3A4, the liver enzyme that clears docetaxel, and higher levels of a chemotherapy drug mean harsher side effects, not better results.”

Reviewed by 2 · Jul 18, 2026

Open the Docetaxel interaction page

One more smart check

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

We hold 5 real supplement products containing Black Psyllium, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Black Psyllium. Even though Black Psyllium itself has no known interaction with Docetaxel, 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 Black Psyllium and Docetaxel 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 Black Psyllium
Top half

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

29 days ago today
Medication Docetaxel
Top 25%

#344 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 Black Psyllium reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Black Psyllium and Docetaxel 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 Black Psyllium

What is Black Psyllium?

Black Psyllium
  • Constipation
  • Diarrhea
  • High cholesterol
  • Digestive health
  • Blood sugar support
  • Weight management

Black psyllium is a soluble-fiber supplement made from the seeds of a Plantago plant, used mostly to ease constipation and support digestive health. It is best known and most studied for relieving constipation and may modestly help lower cholesterol, but it must always be taken with plenty of water. Talk with your pharmacist or doctor before starting, especially if you have swallowing problems or bowel disorders.

Plantago psyllium · Plantaginaceae · Seeds and seed husk · Powder, capsules, granules, whole seeds, wafers

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

Black Psyllium: dosing

There is no single official dose of black psyllium for everyone, and the right amount depends on the product and the reason you are using it. Because products differ in strength and form, the best approach is to follow the directions on the label.A general principle with all psyllium products is to mix the dose in a full glass of water or other liquid and drink it right away, then drink more water afterward. They can help you choose the right product and dose.

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

Read the full Black Psyllium monograph & all interactions
Medication

About Docetaxel Injection

What Is Docetaxel Injection Used For?

Brand name: Taxotere

Docetaxel Injection is used to treat a number of serious cancers. Beizray (docetaxel injection) is approved as a single agent for locally advanced or metastatic breast cancer after prior chemotherapy has stopped working, and in combination with doxorubicin and cyclophosphamide as adjuvant (after-surgery) treatment for operable node-positive breast cancer. It is also used as a single agent for locally advanced or metastatic non-small cell lung cancer (NSCLC) after platinum-based chemotherapy has failed, and with cisplatin for chemotherapy-naive advanced NSCLC.

Beizray is used with prednisone for metastatic castration-resistant prostate cancer. It is also used with cisplatin and fluorouracil for advanced gastric adenocarcinoma (including gastroesophageal junction cancer) in patients who have not received prior chemotherapy for advanced disease, and for induction treatment of locally advanced squamous cell carcinoma of the head and neck (SCCHN).

Most-Reported Side Effects for Docetaxel

From FAERS, the FDA’s public side-effect reporting system (0 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Alopecia 16,970 reports
Madarosis 6,717 reports
Hair texture abnormal 5,993 reports
Hair colour changes 5,874 reports
Hair disorder 5,625 reports
See full Docetaxel Injection drug information
Keep checking

Other Drugs & Black Psyllium

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

0Major
23Moderate
2,002Minor
804No known interaction
23 Moderate 2,002 Minor 804 No interaction
Moderate

23 interactions

Minor

2,002 interactions

Showing 60 of 2,002 minor interactions — see all 2,002 on the Black Psyllium page.

No interaction 804 drugs checked — show the list

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

Showing the 60 most looked-up of 804 medications checked with no known interaction — see the full Black Psyllium list.

See the full Black Psyllium interactions page
See every supplement checked against Docetaxel, ranked by severity
Evidence & sources

Black Psyllium References

The 18 references that drive our Black Psyllium 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. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  2. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
  3. Covington TR, et al. Handbook of Nonprescription Drugs. 11th ed. Washington, DC: American Pharmaceutical Association, 1996.
  4. Etman M. Effect of a bulk forming laxative on the bioavailablility of carbamazepine in man. Drug Dev Ind Pharm 1995;21:1901-6.
  5. Perlman BB. Interaction between lithium salts and ispaghula husk. Lancet 1990;335:416.
  6. Vaswani SK, Hamilton RG, Valentine MD, Adkinson NF. Psyllium laxative-induced anaphylaxis, asthma, and rhinitis. Allergy 1996;51:266-8. PubMed
  7. Lantner RR, Espiritu BR, Zumerchik P, Tobin MC. Anaphylaxis following ingestion of a psyllium-containing cereal. JAMA 1990;264:2534-6. DOI
  8. Kaplan MJ. Anaphylactic reaction to "Heartwise." N Engl J Med 1990;323:1072-3. DOI
  9. Nordstrom M, Melander A, Robertsson E, Steen B. Influence of wheat bran and of a bulk-forming ispaghula cathartic on the bioavailability of digoxin in geriatric in-patients. Drug Nutr Interact 1987;5:67-9..
  10. Robinson DS, Benjamin DM, McCormack JJ. Interaction of warfarin and nonsystemic gastrointestinal drugs. Clin Pharmacol Ther 1971;12:491-5. PubMed
  11. Garcia JJ, Fernandez N, Diez MJ, et al. Influence of two dietary fibers in the oral bioavailability and other pharmacokinetic parameters of ethinyloestradiol. Contraception 2000;62:253-7. PubMed
  12. Fernandez N, Lopez C, Díez R, et al. Drug interactions with the dietary fiber Plantago ovata husk. Expert Opin Drug Metab Toxicol 2012;8(11):1377-86.
  13. Semen plantaginis in: WHO Monographs on Selected Medicinal Plants, volume 1. World Health Organization, Geneva, 1999. Available at http://apps.who.int/medicinedocs/en/d/Js2200e/. Accessed November 26, 1026.
  14. Code of Federal Regulations, Title 21 (21CFR 101.17). Food labeling warning, notice, and safe handling statements. Available at www.ecfr.gov/cgi-bin/text-idx?SID=20f647d3b74161501f46564b915b4048&mc=true&node=se21.2.101_117&rgn=div8. Accessed December 3, 2
  15. Code of Federal Regulations, Title 21 (21CFR 201.319). Specific labeling requirements - water-soluble gums, hydrophilic gums, and hydrophilic mucilloids. Available at www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?fr=201.319. Accessed Dece

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 Black Psyllium and Docetaxel Together: Common Questions

Is it safe to take Black Psyllium with Docetaxel?
We do not list a known interaction between Black Psyllium and Docetaxel. 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 Black Psyllium and Docetaxel have any of the same side effects?
Yes — our sources link each of them separately to one 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.
Are Black Psyllium and Docetaxel used for the same thing?
They overlap in purpose, which usually means the real question is whether you need both rather than whether they are safe together. This page lists the shared uses and how strong the evidence is for Black Psyllium in each. That is a conversation for your prescriber, especially if Docetaxel is being adjusted to a target.
How was the Black Psyllium and Docetaxel combination checked?
Interactions in our licensed database are recorded against drug classes. Docetaxel is filed under 2 classifications, and Black Psyllium has documented interactions with 7 drug classes — none of Docetaxel'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 Black Psyllium interact with any other medications?
Yes. Black Psyllium has 2,025 documented drug interactions in our database — Docetaxel 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 Docetaxel interact with any supplements?
Yes. Docetaxel has documented interactions with 121 supplements in our database — Black Psyllium is not one of them. The Docetaxel 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

Black Psyllium monograph Uses, safety profile, and every drug interaction in one place Docetaxel Injection drug information The full plain-English guide to this medication Docetaxel supplement interactions Every supplement checked against Docetaxel, 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 18 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Docetaxel and Black Psyllium?

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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.