Can I Take These?

Can You Take CoQ10 (Coenzyme Q10) and Warfarin Together?

CoQ10 may decrease warfarin's blood-thinning effect -- named directly on warfarin's FDA label.

Use cautionEvidence: High

What the interaction means

Warfarin's FDA prescribing information states in its Botanical (Herbal) Products and Foods section: "Conversely, some botanicals may decrease the effects of warfarin sodium (e.g., co-enzyme Q10, St. John's wort, ginseng)." NCCIH's CoQ10 page independently corroborates this from the CoQ10 side: "CoQ10 may interact with the anticoagulant (blood thinner) warfarin and the diabetes drug insulin."

Why it may happen

Not further specified by either source beyond describing CoQ10 as decreasing warfarin's anticoagulant effect.

Practical context

Because warfarin already carries a boxed warning for bleeding risk and requires individualized dose management via INR monitoring, any change in effect from starting, stopping, or changing a CoQ10 supplement should be discussed with the prescriber managing anticoagulation. No spacing interval applies -- this is an ongoing metabolic/pharmacodynamic effect, not a same-day absorption-timing issue.

What the sources say

Warfarin Sodium Tablets — FDA Prescribing Information — Amneal Pharmaceuticals LLC (via DailyMed, U.S. National Library of Medicine)Coenzyme Q10 — National Center for Complementary and Integrative Health (NIH)

Last reviewed 2026-08-22

Medical information disclaimer: this information is general and educational. It does not diagnose conditions, prescribe treatment, or determine whether a combination is safe for you personally. Follow your prescription label and ask a pharmacist or clinician before starting, stopping, or combining products. Full disclaimer.

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