Supplements and Dabigatran etexilate.
Dabigatran etexilate, sold under the brand name Pradaxa, is a direct oral anticoagulant (DOAC): it inhibits factor Xa or thrombin directly, without routine INR monitoring.
Dabigatran etexilate is a direct oral anticoagulant (DOAC). The class includes the factor Xa inhibitors (apixaban, rivaroxaban, edoxaban) and the direct thrombin inhibitor (dabigatran). DOACs replaced warfarin in atrial fibrillation stroke prevention and most venous thromboembolism treatment, because they need no routine INR monitoring. The tradeoff. No antidote for most clinical situations, and reduced flexibility around excess anticoagulation. The supplement surface is quieter than warfarin's but real. DOACs are CYP3A4 metabolised (apixaban, rivaroxaban) and P-glycoprotein substrates, so strong dual 3A4 plus P-gp inhibitors raise plasma levels. Additive antiplatelet supplements (fish oil at high doses, ginkgo, garlic extract, curcumin) add to bleeding risk without changing plasma DOAC level. Washout before surgery is 24 to 48 hours depending on renal function and bleeding risk. Supplement washout should align with it.
Below are the 5 documented pairs we have explicitly assessed against Dabigatran etexilate in the Distil database: 4 amber and 1 green. The pairs cluster around 1 mechanism: Additive antiplatelet effect. Every call is cited to either a clinical reference (PMID) or the British National Formulary. Anything not on this list is either still to be assessed or beyond our database scope. The checker beneath surfaces assessments by supplement, and the missing-item form at the bottom of the page routes any uncatalogued supplement into our next curation pass.
Documented interactions
Additive antiplatelet effect
Fisetin may mildly thin the blood by reducing platelet clumping, which could add to dabigatran. There is no routine blood test for dabigatran, so keep any fisetin course modest and tell your GP if you take both. The amount in food is not the concern.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
At supplement doses below 1 gram of EPA+DHA per day, fish oil adds little to dabigatran's bleeding risk. At higher cardiology doses (3 grams per day and above) the antiplatelet effect is more meaningful and the combined bleeding risk rises. Dabigatran has no INR test to monitor this, so tell your GP what dose of fish oil you take.
Resveratrol can mildly thin the blood by reducing platelet clumping, which could add to dabigatran. There is no routine blood test for dabigatran, so keep any resveratrol dose modest and tell your GP if you take both. Food amounts are not the concern.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Vitamin E at high doses (above 400 IU per day) can raise bleeding risk in its own right, which may add to dabigatran. At low supplement doses (100 to 200 IU) the effect is minimal. Dabigatran has no routine blood test to monitor this, so keep vitamin E modest and tell your GP if you take high-dose vitamin E. Stop it six weeks before planned surgery.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Other
Dabigatran is not a warfarin-type blood thinner, so vitamin K does not work against it the way it works against warfarin. Vitamin K2 does not reduce dabigatran's effect. If you are on dabigatran rather than warfarin, this is a common worry that does not apply to you.
What this list does not say. Pairs not flagged here are not implicitly safe. They are either not yet in our database, or fall outside our inclusion scope (food-supplement interactions only; for drug-drug interactions, the BNF is authoritative). Use the checker below to surface any supplement, and submit a missing item if you take something we have not catalogued.
How we grade severity, choose what's in scope, and what we exclude.
Every call on this page is reasoned. We publish the full rubric for severity tiers, the medication inclusion logic, the evidence grades we accept, and what we deliberately leave out. About three thousand words. Worth reading once if you use this tool more than occasionally.
Read the full methodologyWant this checked across everything you take?
This page checks the pairs you enter. The personalised Distil report goes further:
- the same graded, cited interaction check across your whole stack, not just the pairs you thought to type in
- where your current routine may be leaving you short of your goals
- the evidence-backed compounds worth adding, and the ones worth dropping
It's a paid report: £79, or £49 for the first 25 customers. The interactions check is one section of it, and you can read a real one in full before you buy.
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