Is Garlic Safe with warfarin?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Inform your doctor if you are taking garlic supplements. Monitor for signs of bleeding and have your INR checked more frequently.
Why this interaction occurs
Garlic may cause bleeding events when taken alone and has anticoagulant, antiplatelet, and/or fibrinolytic properties. These effects are expected to be additive to the anticoagulant effects of warfarin.
Evidence
Evidence level: strong.
Data source
FDA Drug Label
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 Garlic interactions → · All warfarin interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.