Drug & supplement interaction

Wheat Bran + Tamoxifen Citrate

Tamoxifen Citrate brand names: Nolvadex, Soltamox.

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 Wheat Bran and Tamoxifen Citrate 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

Wheat Bran and Tamoxifen Citrate

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 Tamoxifen Citrate and Wheat Bran 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.

Worth understanding: our licensed dataset holds no drug-interaction record for Wheat Bran at all — not against Tamoxifen Citrate, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.

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.

Wheat Bran safety at a glance

Wheat Bran overall Use caution Generally safe as a food for most people, but it contains gluten and should be increased slowly with plenty of fluids.
Pregnancy Likely Safe When used orally. Read the full pregnancy detail
Breastfeeding Likely Safe When used orally. 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 Tamoxifen Citrate and Wheat Bran? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

No Interaction Found — But Data Suggests Wheat Bran and Tamoxifen Citrate 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. 2 of them are worth acting on rather than waiting out — marked below.

  • A severe allergic reaction Worth acting on Additional detail

    Wheat Bran

    “Orally, wheat bran seems to be well tolerated.

    Most Common Adverse Effects:

    Orally: Flatulence and gastrointestinal discomfort.

    Serious Adverse Effects (Rare):

    All routes of administration: Wheat products can cause allergic reactions, including anaphylaxis.”

    Wheat Bran · Natural Medicines adverse-effect record, reported in flatulence.

    Tamoxifen Citrate

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

  • An allergic reaction Worth acting on Additional detail

    Wheat Bran

    “Wheat can cause allergic reactions in sensitive individuals. Due to the prevalence of this allergy in the general population, wheat and wheat products, such as wheat bran, are classified as major food allergens in the United States.”

    Wheat Bran · Natural Medicines adverse-effect record, reported in allergic rhinitis (hay fever).

    1 source cited
    1. 105410. Food and Drug Administration. Food Allergen Labeling and Consumer Protection Act of 2004 (FALCPA); Public Law 108-282, Title II. Accessed on May 19, 2021. Available at: https://www.fda.gov/food/food-allergensgluten-free-guidance-documents-regulatory-infor

    Tamoxifen Citrate

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

  • Stomach upset Additional detail

    Wheat Bran

    “Orally, wheat bran may cause flatulence and gastrointestinal discomfort, especially with initial use. However, 2 clinical studies designed to look at side effects noted no increase in GI symptoms in subjects taking 20 to 40 grams of wheat bran per day.”

    Wheat Bran · Natural Medicines adverse-effect record, reported in flatulence.

    2 sources cited
    1. 6265. McRorie J, Kesler J, Bishop L, et al. Effects of wheat bran and Olestra on objective measures of stool and subjective reports of GI symptoms. Am J Gastroenterol 2000;95:1244-52. PubMed
    2. 113128. Dalile B, La Torre D, Kalc P, et al. Extruded Wheat Bran Consumption Increases Serum Short-Chain Fatty Acids but Does Not Modulate Psychobiological Functions in Healthy Men: A Randomized, Placebo-Controlled Trial. Front Nutr 2022;9:896154. PubMed

    Tamoxifen Citrate

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

Reported for Wheat Bran but not commonly for Tamoxifen Citrate: bloating or gas.

Effects for Tamoxifen Citrate come from the ADVERSE REACTIONS section of its FDA label; effects for Wheat Bran 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

Wheat Bran in Pregnancy & Breastfeeding

Pregnancy And Lactation Likely Safe

When used orally.

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 Tamoxifen Citrate Is Prescribed For, and What Wheat Bran Has Been Studied For

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

Tamoxifen Citrate is prescribed for: Tamoxifen is used to treat estrogen receptor-positive metastatic breast cancer in both women and men, and as follow-up (adjuvant) therapy after surgery for early-stage breast cancer in women. It also reduces the occurrence of cancer in the opposite breast when used as adjuvant therapy. In women with ductal carcinoma in situ (DCIS — an early, non-invasive breast change) following surgery and radiation, tamoxifen lowers the risk of developing invasive breast cancer. It is also approved to reduce the risk of breast cancer in women who are at high risk but have not yet been diagnosed.

Read the rest of what Tamoxifen Citrate is prescribed for

Both Tamoxifen Citrate tablets and Soltamox oral solution share these indications.

Wheat Bran has been studied for:

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

    Wheat Bran for cancer

    Although there is interest in using oral wheat bran to prevent various types of cancer, there is insufficient reliable information about the clinical effects of wheat bran 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 Tamoxifen Citrate on your own; if you are taking Wheat Bran for the same health topic, tell your prescriber, especially if the medicine is being adjusted to a target.

From our Q&A

Questions About Wheat Bran or Tamoxifen Citrate

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Wheat Bran or Tamoxifen Citrate, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Tamoxifen Citrate

This page covers Wheat Bran only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Tamoxifen Citrate page lists 210 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), American Hellebore (major), Arsenic (major), Beer (major) and Cesium (major).

By severity: 11 major · 166 moderate · 33 minor.

From our pharmacist’s overview on the Tamoxifen Citrate page

“Tamoxifen (Nolvadex, Soltamox) often stands between a breast cancer patient and a recurrence, so the stakes on this page run higher than usual. Eleven of the 210 supplements and herbs on file carry a major rating, and those eleven deserve your attention ahead of everything else.”

Reviewed by 2 · Jul 18, 2026

Open the Tamoxifen Citrate interaction page

One more smart check

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

We hold 8 real supplement products containing Wheat Bran, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Wheat Bran. Even though Wheat Bran itself has no known interaction with Tamoxifen Citrate, 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 Wheat Bran and Tamoxifen Citrate 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 Wheat Bran
Top half

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

29 days ago today
Medication Tamoxifen Citrate
Top 25%

#399 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 Wheat Bran reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Wheat Bran and Tamoxifen Citrate 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 Wheat Bran

What is Wheat Bran?

  • Constipation relief
  • Digestive regularity
  • Heart health support
  • Blood sugar support
  • Weight management

Wheat bran is the fiber-rich outer layer of the wheat kernel and is best known as a natural bulk-forming way to relieve constipation and support regular bowel movements. It is generally safe for most people who can eat wheat, but it must be taken with plenty of water and should be avoided by anyone with a wheat allergy, celiac disease, or gluten sensitivity.

Triticum aestivum · Poaceae · Outer bran layer of the wheat grain · Loose bran, breakfast cereals, baked goods, capsules, and powders

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

Wheat Bran: dosing

There is no single official dose of wheat bran as a supplement. Most people use it simply as a food, adjusting the amount to keep their bowels regular.A good general rule is to start with a small amount and increase slowly over days to weeks, while drinking plenty of water.

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

Read the full Wheat Bran monograph & all interactions
Medication

About Tamoxifen

What Is Tamoxifen Used For?

Brand names: Nolvadex, Soltamox

Tamoxifen is used to treat estrogen receptor-positive metastatic breast cancer in both women and men, and as follow-up (adjuvant) therapy after surgery for early-stage breast cancer in women. It also reduces the occurrence of cancer in the opposite breast when used as adjuvant therapy.

In women with ductal carcinoma in situ (DCIS — an early, non-invasive breast change) following surgery and radiation, tamoxifen lowers the risk of developing invasive breast cancer. It is also approved to reduce the risk of breast cancer in women who are at high risk but have not yet been diagnosed. Both Tamoxifen Citrate tablets and Soltamox oral solution share these indications.

See full Tamoxifen drug information
Keep checking

Other Drugs & Wheat Bran

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

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

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

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Wheat Bran list.

See the full Wheat Bran interactions page
See every supplement checked against Tamoxifen Citrate, ranked by severity
Evidence & sources

Wheat Bran References

The 4 references that drive our Wheat Bran 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. Foster S, Tyler VE. Tyler's Honest Herbal: A Sensible Guide to the Use of Herbs and Related Remedies. 3rd ed., Binghamton, NY: Haworth Herbal Press, 1993.
  2. McRorie J, Kesler J, Bishop L, et al. Effects of wheat bran and Olestra on objective measures of stool and subjective reports of GI symptoms. Am J Gastroenterol 2000;95:1244-52. PubMed
  3. Food and Drug Administration. Food Allergen Labeling and Consumer Protection Act of 2004 (FALCPA); Public Law 108-282, Title II. Accessed on May 19, 2021. Available at: https://www.fda.gov/food/food-allergensgluten-free-guidance-documents-regulatory-infor
  4. Dalile B, La Torre D, Kalc P, et al. Extruded Wheat Bran Consumption Increases Serum Short-Chain Fatty Acids but Does Not Modulate Psychobiological Functions in Healthy Men: A Randomized, Placebo-Controlled Trial. Front Nutr 2022;9:896154. 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 Wheat Bran and Tamoxifen Citrate Together: Common Questions

Is it safe to take Wheat Bran with Tamoxifen Citrate?
We do not list a known interaction between Wheat Bran and Tamoxifen Citrate. 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 Wheat Bran and Tamoxifen Citrate 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.
Are Wheat Bran and Tamoxifen Citrate 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 Wheat Bran in each. That is a conversation for your prescriber, especially if Tamoxifen Citrate is being adjusted to a target.
Does Tamoxifen Citrate interact with any supplements?
Yes. Tamoxifen Citrate has documented interactions with 210 supplements in our database — Wheat Bran is not one of them. The Tamoxifen Citrate 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

Wheat Bran monograph Uses, safety profile, and every drug interaction in one place Tamoxifen drug information The full plain-English guide to this medication Tamoxifen Citrate supplement interactions Every supplement checked against Tamoxifen Citrate, 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 4 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Tamoxifen Citrate and Wheat Bran?

Our pharmacists answer your medication & supplement questions — free.

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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.