What happens when you take rivaroxaban with ginkgo?
Rivaroxaban is a direct oral anticoagulant (DOAC) sold under the brand name Xarelto. It works by blocking Factor Xa, an enzyme your body needs to form blood clots. Ginkgo biloba is an herbal supplement often taken for memory and circulation, and several of its constituents, especially ginkgolide B, can inhibit platelet-activating factor.
On paper that combination looks worrying: an anticoagulant plus an herb with antiplatelet properties should add up to more bleeding. The actual clinical evidence is more nuanced. A controlled pharmacokinetic and pharmacodynamic study in healthy volunteers showed that single and repeated 240 mg daily doses of the standardized EGb 761 extract did not change rivaroxaban plasma concentrations or anti-Factor Xa activity, and produced no clinically significant changes in bleeding times or coagulation parameters.
That said, the study was small, short, and run in healthy young adults. Real-world patients are older, often take multiple bleeding-risk medications, and use ginkgo extracts of varying quality. The pharmacology and case reports of ginkgo-related bleeding still warrant caution.
Why is this important?
Rivaroxaban already carries a meaningful baseline bleeding risk. Major bleeding events occur in roughly 2 to 4 percent of patients per year, and even minor bleeds can be distressing. Anything that adds even a small additional antiplatelet effect can tip a patient who is already on the edge.
Patients who are elderly, have low body weight, kidney impairment, a history of GI bleeding, or who also take aspirin, NSAIDs, SSRIs, or other supplements with antiplatelet activity (fish oil, garlic, vitamin E) are most likely to feel the effect of a small additional push. Ginkgo on its own has been associated with spontaneous bleeds including subdural hematomas in case reports, especially in older adults.
Another reason this matters is that ginkgo is often self-prescribed. Patients may not mention it to their doctor or pharmacist, so the prescriber has no opportunity to weigh it into bleeding-risk calculations.
What should you do?
The safest default is to avoid ginkgo while on rivaroxaban unless your prescriber has specifically approved it. The clinical benefit of ginkgo for most indications is modest, and the downside of a bleed on a DOAC can be serious or life-threatening.
If you and your doctor decide the benefit is worth it, use only a standardized extract such as EGb 761 at no more than 240 mg per day, and learn the warning signs of bleeding: unusual bruising, prolonged bleeding from small cuts, frequent nosebleeds, bleeding gums when brushing, pink or red urine, black or tarry stools, coughing up blood, severe headache, sudden weakness or vision changes. Any of these warrant immediate medical attention.
Stop ginkgo at least 7 to 10 days before any planned surgery, dental procedure, or epidural injection, and tell every clinician you see (including dentists) that you take both.
Which specific products are affected?
This applies to rivaroxaban under any brand name, including Xarelto, and to all dosages (2.5, 10, 15, and 20 mg).
On the ginkgo side, the interaction applies to all ginkgo biloba leaf extracts, including standardized 24/6 extracts (24% flavone glycosides, 6% terpene lactones) like EGb 761 (Tebonin, Tanakan, Rokan), as well as non-standardized ginkgo teas, tinctures, and combination memory or circulation formulas. Many sleep and brain-health stacks contain ginkgo without highlighting it, so check labels carefully.
The same considerations apply to the other DOACs in this class (apixaban, edoxaban, dabigatran) and to warfarin, although the mechanisms and the strength of evidence differ.
The bottom line
Controlled studies do not show that ginkgo meaningfully changes rivaroxaban blood levels, but the theoretical additive antiplatelet effect, plus case reports of ginkgo-related bleeds, mean most pharmacists and cardiologists advise against combining them. If you are on rivaroxaban, the simplest move is to skip ginkgo. If you want to use it anyway, get your prescriber's sign-off, stick to a standardized extract at the lowest effective dose, and know exactly what bleeding signs should send you to the emergency room.