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Ginkgo Biloba Side Effects: Headache, Bleeding and More
Ginkgo biloba side effects most often include dizziness, stomach upset and headache. NCCIH also lists nausea and allergic skin reactions, and says some data suggest a higher bleeding risk. Seizures have been reported in people at risk. Ask a pharmacist first, especially if you take a blood thinner.
By the MemoPryl label deskUpdated · 4 min read
Which side effects of ginkgo are common?
Dizziness, stomach symptoms and headache are the most common ones with leaf extract (NCCIH, Ginkgo).
NCCIH's digest adds nausea and allergic skin reactions to the list (NCCIH, Supplements and Cognition). Most of these are mild.
| Group | Effects |
|---|---|
| Most common | Dizziness, stomach upset, headache |
| Also listed | Nausea, allergic skin reaction |
| Rare, serious | Bleeding, seizures in people at risk |
Can ginkgo cause bleeding or seizures?
Rarely, but the reports are real. Memorial Sloan Kettering lists spontaneous bleeding, including hematomas and bleeding in the brain, and seizures in predisposed people or those on medicines that lower the seizure threshold (MSK, Ginkgo).
NCCIH says ginkgo may increase bleeding risk with anticoagulants such as warfarin (NCCIH, Ginkgo). Fresh ginkgo seeds are toxic, which is a different matter from leaf extract (NCCIH, Ginkgo).
Stop the product and get medical advice for bruising you cannot explain, a long nosebleed, or a seizure.
Who should ask a doctor before taking ginkgo?
Anyone who takes a blood thinner, aspirin or seizure medicine, has a bleeding disorder or has surgery coming up.
Keep taking prescribed medicine exactly as directed. Try the quick questions, then take the answers to your pharmacist.
MemoPryl: capsules in 2, 3 or 6 bottlesRead the bottle · check medicines first · 60-day window (confirm)
See packsAre these side effects listed on the MemoPryl bottle?
We cannot tell. No image we have prints a warnings line, directions or a Supplement Facts panel.
Ginkgo is named on a sibling pack, not confirmed for the bottle you receive. If your bottle lists it, compare its warnings with the list above. To report a problem, FDA points people to its Safety Reporting Portal (FDA, Report a Supplement Problem). For the main page, see MemoPryl side effects.
Thinking about MemoPryl?Check your medicines with a pharmacist first. The checkout confirms prices and the 60-day window.
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FAQ01
Questions people ask about MemoPryl
Does ginkgo cause dizziness?
Yes, dizziness is among the most common effects of ginkgo leaf extract, along with stomach symptoms and headache. If it appears after starting a new capsule, tell your pharmacist.
Can ginkgo cause an allergic reaction?
It can. Allergic skin reactions are on NCCIH's list of side effects. Stop the product and get medical advice if you notice a rash, swelling or trouble breathing.
Is ginkgo safe for people with epilepsy?
Ask a doctor first. Memorial Sloan Kettering reports seizures in predisposed people, so anyone with a seizure history should check with a clinician before using ginkgo.
Who wrote this02
Written and reviewed by
Each page draws on the bottle images, the seller's product notes and linked NIH, FDA, FTC and peer-reviewed sources.
Last updated . See our editorial standards and how we check reviews. This website is run by MemoPryl USA retail, not by the manufacturer or the distributor of the bottle. We are paid a commission when you buy through our order links.
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