Drug & supplement interaction

Chelation Therapy Products + Warfarin

Warfarin brand name: Warfarin.

Moderate Interaction
Medically reviewed by · Updated September 2026
The bottom line Moderate

Chelation Therapy Products has a moderate interaction with Warfarin. Theoretically, disodium ethylenediamine tetraacetic acid (EDTA) can decrease the anticoagulant effects of warfarin.

Read the full interaction report
SeverityModerate
LikelihoodPossible
EvidenceD
What do Severity, Likelihood & Evidence mean?
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Interaction report

Chelation Therapy Products and Warfarin

Here is the interaction we found between these two, with the evidence behind it.

Moderate

WARFARIN (Coumadin)

Theoretically, disodium ethylenediamine tetraacetic acid (EDTA) can decrease the anticoagulant effects of warfarin.
Disodium EDTA has been reported to decrease international normalized ratio (INR) in a patient taking warfarin.
Severity Moderate Likelihood Possible Evidence D

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.

Dr. Brian Staiger, PharmD, BCPS
Dr. Brian Staiger explains PharmD, Clinical Pharmacist

Here's the situation if you take warfarin and are considering EDTA-based chelation. There's a single case report suggesting that disodium EDTA lowered a patient's INR, which is the lab number we use to check how 'thin' your blood is on warfarin. A lower INR means warfarin may be working less than expected, and that could leave you under-protected against clots, which is the very thing warfarin is meant to prevent.

I want to be honest about how thin this evidence is. It's theoretical and based on one anecdotal report, so it's far from proven. But warfarin is a narrow-margin drug where even small shifts matter, so please don't start any chelation product without first talking to your doctor or pharmacist so they can watch your INR closely.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Grebe HB, Gregory PJ. Inhibition of warfarin anticoagulation associated with chelation therapy. Pharmacotherapy 2002;22:1067-9.. PubMed

What These Ratings Mean

Every interaction above is graded three ways — here’s the key to each label.

Severity how clinically significant the interaction is
Major

Clinically significant. Avoid the combination, or use only under close professional supervision.

Moderate

Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.

Minor

Generally not serious. Be aware of it and mention it to your pharmacist.

Likelihood how strong the evidence is that the interaction actually happens in people
  • LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
  • ProbableInteraction 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.
  • PossibleInteraction 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.
  • UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
Evidence the quality of the studies behind the rating (graded A–D)
  • AHigh-quality meta-analysis (quantitative systematic review).
  • BCase-control study.
  • CConsensus.
  • DAnecdotal evidence.

These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.

Keep it in perspective

Chelation Therapy Products Also Interacts With Other Medications

Chelation Therapy Products has 13 major, 76 moderate known drug interactions in our database — the Warfarin one above is one of them. If you take anything else, check it against the full list below.

Major 13 Moderate 76 No known interaction 2,741 (incl. Warfarin)
Taking anything else?

Check Another of Your Medications Against Chelation Therapy Products

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

From our Q&A

Questions About Chelation Therapy Products 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 Chelation Therapy Products 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 Chelation Therapy Products 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

How much people look this up

Where Chelation Therapy Products 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 Chelation Therapy Products
Steady interest

#1,322 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.

Supplement

About Chelation Therapy Products

What is Chelation Therapy Products?

  • Heavy metal poisoning (lead, mercury, arsenic, iron)
  • Marketed for heart and artery health
  • Promoted for 'detoxification'
  • Promoted for circulation problems
  • Sometimes promoted for autism (not supported)

Chelation therapy uses binding agents (like EDTA, DMSA, or DMPS) that latch onto certain metals so the body can remove them. It is an FDA-approved, doctor-supervised treatment only for proven heavy metal poisoning; over-the-counter 'chelation' supplements and unsupervised IV chelation for heart disease or detox are not proven safe or effective and can be dangerous. Talk to your doctor or pharmacist before considering any chelation product.

Read the full Chelation Therapy Products 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 & Chelation Therapy Products

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

13Major
76Moderate
0Minor
2,740No known interaction
13 Major 76 Moderate 2,740 No interaction
Major

13 interactions

Moderate

76 interactions

Showing 60 of 76 moderate interactions — see all 76 on the Chelation Therapy Products page.

No interaction 2,740 drugs checked — show the list

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

Showing the 60 most looked-up of 2,740 medications checked with no known interaction — see the full Chelation Therapy Products list.

See the full Chelation Therapy Products interactions page
See every supplement checked against Warfarin, ranked by severity
Sources

Sources & How We Checked

Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

Keep exploring
Chelation Therapy Products monograph › Uses, safety, and every drug interaction in one place Warfarin supplement interactions › Every supplement checked against Warfarin, ranked by severity Warfarin drug information › The full plain-English guide to this medication Supplement interaction checker › Check any supplement or product against your medications Browse medications A–Z › Every drug we've checked against herbs & supplements Ask a pharmacist › Free, personal answer from our licensed team
Pharmacist Counseling Corner

Taking Chelation Therapy Products and Warfarin Together: Common Questions

Can you take Chelation Therapy Products with Warfarin?
There is a moderate interaction, so it may be acceptable with monitoring or timing changes — but check with your pharmacist first. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Chelation Therapy Products and Warfarin interaction?
We rate it Moderate. This combination may require monitoring, a dose adjustment, or separating the times you take each one. Consult your pharmacist before using them together.

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

Still Have a Question About Warfarin and Chelation Therapy Products?

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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.