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Moderate· moderate-evidence
May be possible under supervision — talk to your prescriber or pharmacist before combining.
Chamomile contains coumarin compounds that may enhance warfarin's anticoagulant effect. Cases of bleeding have been reported.
Coumarin constituents in chamomile may have mild anticoagulant activity and inhibit platelet aggregation.
Source: Natural Medicines Database · Reviewed April 2026
Chamomile + Warfarin (Coumadin): use caution. May be possible under supervision — talk to your prescriber or pharmacist before combining. Chamomile contains coumarin compounds that may enhance warfarin's anticoagulant effect. Cases of bleeding have been reported.
Coumarin constituents in chamomile may have mild anticoagulant activity and inhibit platelet aggregation.
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.