Medication · antiplatelet

Supplements and Clopidogrel.

Every documented pair, every citation. Below: 3 documented pairs grouped by mechanism.

Clopidogrel, sold under the brand name Plavix, is an antiplatelet agent: it reduces platelet aggregation.

Below are the 3 documented pairs we have explicitly assessed against Clopidogrel in the Distil database: 3 amber. 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

Amber Garlic Extract

Garlic has mild blood-thinning activity that can add to clopidogrel's. Stop high-dose garlic supplements at least a week before any surgery and tell your GP if you take garlic alongside clopidogrel long-term.

BNF: Clopidogrel

Amber Ginkgo Biloba

Both ginkgo and clopidogrel reduce platelet aggregation, so combining them increases bleeding risk additively. The combination is worth stopping six weeks before any planned surgery or dental procedure.

BNF: Clopidogrel · PMID 29196903

Amber Omega-3 EPA

Standard supplement doses of fish oil (under 1 gram of EPA+DHA per day) add only marginally to the antiplatelet effect of clopidogrel. At higher cardiology doses (3 grams per day and above), the combination meaningfully increases bleeding risk.

BNF: Clopidogrel

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.

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For adults over 18. This tool gives evidence-graded information, not medical advice. Always discuss changes with your GP, especially if you take any medication, are pregnant, breastfeeding, or have a serious health condition.

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Your supplements

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How we decide

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 methodology

Something missing?

If a supplement or medication you take isn't in our autocomplete, tell us and we'll add it in the next quarterly update.

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Distil's interactions database is reviewed and updated every quarter. We grade evidence transparently and publish our methodology, including every database change, at /about/methodology. This tool is information, not a substitute for clinical judgement. If you take medication and supplements together, your GP or pharmacist can review your full regimen against your medical history. If you want a comprehensive personalised stack reasoned against this same database, the Distil report is the next step up.