Drug & supplement interaction

Lupin + Warfarin

Warfarin brand name: Warfarin.

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 Lupin and Warfarin 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

Lupin and Warfarin

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 Warfarin and Lupin 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 Lupin at all — not against Warfarin, 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.

Lupin safety at a glance

Lupin overall Use caution Generally safe as food for most people, but it is a known allergen and bitter (raw) varieties must be properly processed.
Pregnancy Likely Safe When processed lupin products (debittered lupin) are used in food amounts. Consuming commercially-prepared lupin products, including flour, bread, pasta, and br... Read the full pregnancy detail
Breastfeeding Likely Safe When processed lupin products (debittered lupin) are used in food amounts. Consuming commercially-prepared lupin products, including flour, bread, pasta, and br... 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 Warfarin and Lupin? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

No Interaction Found — But Data Suggests Lupin and Warfarin 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.

  • Hives Worth acting on Additional detail

    Lupin

    “Orally, lupin can cause allergic reactions such as rhinitis, wheeze, cough, itchy throat, hives, urticaria, lip swelling, breathing difficulties, and anaphylaxis. Observational research has found that the prevalence of lupin allergy in the general population is about 1.6%. In people with lupin allergies, up to 75% also have allergies to other legumes and up to 82% have allergies to pollen.”

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

    6 sources cited
    1. 103846. US Food and Drug Administration Consumer Updates. Allergies to a legume called lupin: what you need to know. 08/14/2015. https://www.fda.gov/consumers/consumer-updates/allergies-legume-called-lupin-what-you-need-know (Accessed 10/09/2020).
    2. 98353. Hieta N, Hasan T, Mäkinen-Kiljunen S, Lammintausta K. Lupin allergy and lupin sensitization among patients with suspected food allergy. Ann Allergy Asthma Immunol. 2009;103(3):233-7. PubMed
    3. 98367. Reis AM, Fernandes NP, Marques SL, et al. Lupine sensitisation in a population of 1,160 subjects. Allergol Immunopathol (Madr). 2007;35(4):162-3.
    4. 98361. Lindvik H, Holden L, Løvik M, Cvancarova M, Halvorsen R. Lupin sensitization and clinical allergy in food allergic children in Norway. Acta Paediatr. 2008;97(1):91-5. PubMed
    5. 98339. Ballabio C, Peñas E, Uberti F, et al. Characterization of the sensitization profile to lupin in peanut-allergic children and assessment of cross-reactivity risk. Pediatr Allergy Immunol. 2013;24(3):270-5. PubMed
    6. 98348. Eguíluz Gracia I, Martínez González de Lema B, Rubio-Pérez M, et al. Allergic reaction to undeclared lupin in a chocolate. J Investig Allergol Clin Immunol. 2015;25(2):140-2.

    Warfarin

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

  • An allergic reaction Worth acting on Additional detail

    Lupin

    “Orally, lupin products with minimal levels of quinolizidine alkaloids (debittered lupin) are well tolerated. Common side effects include bloating, flatulence, and abdominal pain. Lupin can also cause allergic reactions, such as shortness of breath, rash, and anaphylaxis in sensitized individuals.

    Bitter lupin that is not properly prepared and contains significant quantities of quinolizidine alkaloids can cause antich…”

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

    6 sources cited
    1. 98316. Bähr M, Fechner A, Kiehntopf M, Jahreis G. Consuming a mixed diet enriched with lupin protein beneficially affects plasma lipids in hypercholesterolemic subjects: a randomized controlled trial. Clin Nutr. 2015 Feb;34(1):7-14. PubMed
    2. 98321. Bähr M, Fechner A, Krämer J, Kiehntopf M, Jahreis G. Lupin protein positively affects plasma LDL cholesterol and LDL:HDL cholesterol ratio in hypercholesterolemic adults after four weeks of supplementation: a randomized, controlled crossover study. Nutr J PubMed
    3. 98349. Fechner A, Fenske K, Jahreis G. Effects of legume kernel fibres and citrus fibre on putative risk factors for colorectal cancer: a randomised, double-blind, crossover human intervention trial. Nutr J. 2013;12:101. PubMed
    4. 98350. Fechner A, Kiehntopf M, Jahreis G. The formation of short-chain fatty acids is positively associated with the blood lipid-lowering effect of lupin kernel fiber in moderately hypercholesterolemic adults. J Nutr. 2014;144(5):599-607. PubMed
    5. 103841. Ward NC, Mori TA, Beilin LJ, et al. The effect of regular consumption of lupin-containing foods on glycaemic control and blood pressure in people with type 2 diabetes mellitus. Food Funct. 2020;11(1):741-7. PubMed
    6. 98339. Ballabio C, Peñas E, Uberti F, et al. Characterization of the sensitization profile to lupin in peanut-allergic children and assessment of cross-reactivity risk. Pediatr Allergy Immunol. 2013;24(3):270-5. PubMed

    Warfarin

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

  • Bloating or gas / Stomach pain Additional detail

    Lupin

    “Orally, lupin can cause flatulence, bloating, and abdominal pain.

    Lupin products that have not been processed properly and contain significant quantities of quinolizidine alkaloids cause serious anticholinergic effects including dry mouth, nausea, and constipation.”

    Lupin · Natural Medicines adverse-effect record, reported in constipation.

    6 sources cited
    1. 98321. Bähr M, Fechner A, Krämer J, Kiehntopf M, Jahreis G. Lupin protein positively affects plasma LDL cholesterol and LDL:HDL cholesterol ratio in hypercholesterolemic adults after four weeks of supplementation: a randomized, controlled crossover study. Nutr J PubMed
    2. 103841. Ward NC, Mori TA, Beilin LJ, et al. The effect of regular consumption of lupin-containing foods on glycaemic control and blood pressure in people with type 2 diabetes mellitus. Food Funct. 2020;11(1):741-7. PubMed
    3. 98345. Daverio M, Cavicchiolo ME, Grotto P, Lonati D, Cananzi M, Da Dalt L. Bitter lupine beans ingestion in a child: a disregarded cause of acute anticholinergic toxicity. Eur J Pediatr. 2014;173(12):1549-51. PubMed
    4. 98346. Di Grande A, Paradiso R, Amico S, Fulco G, Fantauzza B, Noto P. Anticholinergic toxicity associated with lupin seed ingestion: case report. Eur J Emerg Med. 2004;11(2):119-20. PubMed
    5. 98362. Litkey J, Dailey MW. Anticholinergic toxicity associated with the ingestion of lupini beans. Am J Emerg Med. 2007;25(2):215-7. PubMed
    6. 98366. Pingault NM, Gibbs RA, Barclay AM, Monaghan M. Two cases of anticholinergic syndrome associated with consumption of bitter lupin flour. Med J Aust. 2009;191(3):173-4. PubMed

    Warfarin

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

  • A skin rash Additional detail

    Lupin

    Recorded for Lupin in the same Natural Medicines adverse-effect record shown under An allergic reaction above.

    Warfarin

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

  • Nausea Additional detail

    Lupin

    “Orally, bitter lupin beans that are not properly processed (debittered) can cause serious anticholinergic effects due to the quinolizidine alkaloids present. There are numerous case reports of these effects in children and adults who consumed improperly prepared lupin products.”

    Lupin · Natural Medicines adverse-effect record, reported in anxiety.

    6 sources cited
    1. 98345. Daverio M, Cavicchiolo ME, Grotto P, Lonati D, Cananzi M, Da Dalt L. Bitter lupine beans ingestion in a child: a disregarded cause of acute anticholinergic toxicity. Eur J Pediatr. 2014;173(12):1549-51. PubMed
    2. 98346. Di Grande A, Paradiso R, Amico S, Fulco G, Fantauzza B, Noto P. Anticholinergic toxicity associated with lupin seed ingestion: case report. Eur J Emerg Med. 2004;11(2):119-20. PubMed
    3. 98362. Litkey J, Dailey MW. Anticholinergic toxicity associated with the ingestion of lupini beans. Am J Emerg Med. 2007;25(2):215-7. PubMed
    4. 98366. Pingault NM, Gibbs RA, Barclay AM, Monaghan M. Two cases of anticholinergic syndrome associated with consumption of bitter lupin flour. Med J Aust. 2009;191(3):173-4. PubMed
    5. 103843. EFSA Panel on Contaminants in the Food Chain (CONTAM), Schrenk D, Bodin L, Chipman JK, et al. Scientific opinion on the risks for animal and human health related to the presence of quinolizidine alkaloids in feed and food, in particular in lupins and lupi
    6. 98344. Carvajal-Larenas FE, Linnemann AR, Nout MJ, Koziol M, van Boekel MA. Lupinus mutabilis: Composition, Uses, Toxicology, and Debittering. Crit Rev Food Sci Nutr. 2016;56(9):1454-87.

    Warfarin

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

Reported for Lupin but not commonly for Warfarin: shortness of breath, trouble passing urine, muscle weakness and blurred vision.

Effects for Warfarin come from the ADVERSE REACTIONS section of its FDA label; effects for Lupin 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

Lupin in Pregnancy & Breastfeeding

Pregnancy And Lactation Likely Safe

When processed lupin products (debittered lupin) are used in food amounts. Consuming commercially-prepared lupin products, including flour, bread, pasta, and breakfast cereals processed to contain less than 0.02% quinolizidine alkaloids, has not been associated with toxicity.

Pregnancy And Lactation Likely Unsafe

When bitter lupin products that contain toxic levels of quinolizidine alkaloids are used orally. These alkaloids have anticholinergic effects which can lead to respiratory failure and death. The quinolizidine alkaloid sparteine can also induce contractions of uterine smooth muscle.

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

From our Q&A

Questions About Lupin or Warfarin

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Lupin or Warfarin, 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 Warfarin

This page covers Lupin only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Warfarin page lists 361 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Alfalfa (major), American Ginseng (major), Beer (major) and Cannabis (major).

By severity: 16 major · 301 moderate · 44 minor.

From our pharmacist’s overview on the Warfarin page

“People take warfarin to prevent dangerous clots, and many are the same people reaching for glucosamine for sore joints or a multivitamin containing vitamin K, which makes this a list that deserves genuine respect. Of the 361 supplements on file for warfarin, 16 carry a major rating, and the danger runs in both directions: some add to w…”

Reviewed by 2 · Jul 18, 2026

Open the Warfarin interaction page

One more smart check

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

We hold 2 real supplement products containing Lupin, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Lupin. Even though Lupin itself has no known interaction with Warfarin, 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 Lupin and Warfarin 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 Lupin
Steady interest

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

29 days ago today
Medication Warfarin
Top 10

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

What is Lupin?

  • Plant-based protein source
  • Blood sugar support
  • Cholesterol support
  • Weight management
  • Digestive fiber

Lupin is a protein- and fiber-rich legume that is eaten as food and sold as flour or protein powder. Early research suggests it may modestly help with blood sugar, cholesterol, and appetite, but evidence is limited. Its biggest concern is that it is a recognized food allergen and can cross-react in people allergic to peanuts.

Lupinus albus · Fabaceae · Seeds (beans) · Whole pickled beans, flour, protein powder, capsules

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

Lupin: dosing

There is no official or standardized supplement dose for lupin. As a food, people eat it in amounts similar to other beans or use lupin flour and protein powder as ingredients in recipes.If you use a lupin supplement or protein product, follow the directions on the product label, and start with a small amount to see how your body tolerates the fiber.

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

Read the full Lupin monograph & all interactions
Medication

About Warfarin

What Is Warfarin Used For?

Brand name: Warfarin

Warfarin sodium tablets and Jantoven tablets are both used to prevent and treat venous thrombosis (blood clots in the veins) and pulmonary embolism (a clot in the lungs). They are also used to prevent clot-related complications in people with atrial fibrillation (an irregular heart rhythm) or who have had a heart valve replaced.

In people who have had a heart attack, warfarin is used to reduce the risk of death, another heart attack, stroke, or other clotting events. It does not dissolve an existing clot, but it helps prevent the clot from growing and stops new dangerous clots from forming.

See full Warfarin drug information
Keep checking

Other Drugs & Lupin

Browse every other medication we’ve checked against Lupin — 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 Lupin 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 Lupin list.

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

Lupin References

The 26 references that drive our Lupin 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. Bähr M, Fechner A, Kiehntopf M, Jahreis G. Consuming a mixed diet enriched with lupin protein beneficially affects plasma lipids in hypercholesterolemic subjects: a randomized controlled trial. Clin Nutr. 2015 Feb;34(1):7-14. PubMed
  2. Bähr M, Fechner A, Krämer J, Kiehntopf M, Jahreis G. Lupin protein positively affects plasma LDL cholesterol and LDL:HDL cholesterol ratio in hypercholesterolemic adults after four weeks of supplementation: a randomized, controlled crossover study. Nutr J PubMed
  3. Ballabio C, Peñas E, Uberti F, et al. Characterization of the sensitization profile to lupin in peanut-allergic children and assessment of cross-reactivity risk. Pediatr Allergy Immunol. 2013;24(3):270-5. PubMed
  4. Belski R, Mori TA, Puddey IB, et al. Effects of lupin-enriched foods on body composition and cardiovascular disease risk factors: a 12-month randomized controlled weight loss trial. Int J Obes (Lond). 2011;35(6):810-9. PubMed
  5. Campbell CP, Jackson AS, Johnson AR, Thomas PS, Yates DH. Occupational sensitization to lupin in the workplace: occupational asthma, rhinitis, and work-aggravated asthma. J Allergy Clin Immunol. 2007;119(5):1133-9. PubMed
  6. Carvajal-Larenas FE, Linnemann AR, Nout MJ, Koziol M, van Boekel MA. Lupinus mutabilis: Composition, Uses, Toxicology, and Debittering. Crit Rev Food Sci Nutr. 2016;56(9):1454-87.
  7. Daverio M, Cavicchiolo ME, Grotto P, Lonati D, Cananzi M, Da Dalt L. Bitter lupine beans ingestion in a child: a disregarded cause of acute anticholinergic toxicity. Eur J Pediatr. 2014;173(12):1549-51. PubMed
  8. Di Grande A, Paradiso R, Amico S, Fulco G, Fantauzza B, Noto P. Anticholinergic toxicity associated with lupin seed ingestion: case report. Eur J Emerg Med. 2004;11(2):119-20. PubMed
  9. Eguíluz Gracia I, Martínez González de Lema B, Rubio-Pérez M, et al. Allergic reaction to undeclared lupin in a chocolate. J Investig Allergol Clin Immunol. 2015;25(2):140-2.
  10. Fechner A, Fenske K, Jahreis G. Effects of legume kernel fibres and citrus fibre on putative risk factors for colorectal cancer: a randomised, double-blind, crossover human intervention trial. Nutr J. 2013;12:101. PubMed
  11. Fechner A, Kiehntopf M, Jahreis G. The formation of short-chain fatty acids is positively associated with the blood lipid-lowering effect of lupin kernel fiber in moderately hypercholesterolemic adults. J Nutr. 2014;144(5):599-607. PubMed
  12. Gayraud J, Mairesse M, Fontaine JF, et al. The prevalence of sensitization to lupin flour in France and Belgium: a prospective study in 5,366 patients, by the Allergy Vigilance Network. Eur Ann Allergy Clin Immunol. 2009;41(1):17-22.
  13. Hieta N, Hasan T, Mäkinen-Kiljunen S, Lammintausta K. Lupin allergy and lupin sensitization among patients with suspected food allergy. Ann Allergy Asthma Immunol. 2009;103(3):233-7. PubMed
  14. Hodgson JM, Lee YP, Puddey IB, et al. Effects of increasing dietary protein and fibre intake with lupin on body weight and composition and blood lipids in overweight men and women. Int J Obes (Lond). 2010;34(6):1086-94. PubMed
  15. Lindvik H, Holden L, Løvik M, Cvancarova M, Halvorsen R. Lupin sensitization and clinical allergy in food allergic children in Norway. Acta Paediatr. 2008;97(1):91-5. 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 Lupin and Warfarin Together: Common Questions

Is it safe to take Lupin with Warfarin?
We do not list a known interaction between Lupin and Warfarin. 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 Lupin and Warfarin have any of the same side effects?
Yes — our sources link each of them separately to 6 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.
Does Warfarin interact with any supplements?
Yes. Warfarin has documented interactions with 361 supplements in our database — Lupin is not one of them. The Warfarin 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

Lupin monograph Uses, safety profile, and every drug interaction in one place Warfarin drug information The full plain-English guide to this medication Warfarin supplement interactions Every supplement checked against Warfarin, 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 26 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Warfarin and Lupin?

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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.