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Moderate· moderate-evidence
May be possible under supervision — talk to your prescriber or pharmacist before combining.
Red clover contains coumarin compounds that may enhance warfarin's anticoagulant effect.
Isoflavones and coumarins in red clover may have additive anticoagulant and antiplatelet activity.
Source: Natural Medicines Database · Reviewed April 2026
Red Clover + Warfarin (Coumadin): use caution. May be possible under supervision — talk to your prescriber or pharmacist before combining. Red clover contains coumarin compounds that may enhance warfarin's anticoagulant effect.
Isoflavones and coumarins in red clover may have additive anticoagulant and antiplatelet activity.
Do not stop either abruptly on your own. Talk to your prescriber or pharmacist promptly — bring this page to your appointment.
Educational information only — not medical advice. Always verify with a healthcare professional.