Is Ginseng Safe with Warfarin?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Avoid Panax ginseng if you are taking warfarin. If use is unavoidable, INR must be monitored weekly until stable. Report any signs of clotting such as leg swelling, chest pain, or shortness of breath to your provider immediately. Do not change your warfarin dose without medical guidance.
Why this interaction occurs
Case reports and pharmacokinetic studies suggest Panax ginseng may induce CYP2C9 and reduce warfarin plasma concentrations, leading to subtherapeutic anticoagulation and increased thromboembolic risk. One published case demonstrated a significant INR reduction from therapeutic range upon ginseng addition.
Evidence
Evidence level: moderate.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 134,328 reports mentioning Warfarin. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Warfarin + supplement combination on this page.
FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.
Frequently asked questions
Related interactions
All Ginseng interactions → · All Warfarin interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.