Ginkgo LEAF EXTRACT is LIKELY SAFE for most people when taken by mouth in appropriate doses. It can cause some minor side effects such as stomach upset, headache, dizziness, constipation, forceful heartbeat, and allergic skin reactions.
There is some concern that ginkgo leaf extract might increase the risk of liver and thyroid cancers. However, this has only occurred in animals given extremely high doses of ginkgo. There is not enough information to know if it could happen in humans.
Ginkgo fruit and pulp can cause severe allergic skin reactions and irritation of mucous membranes. Ginkgo might cause an allergic reaction in people who are allergic to poison ivy, poison oak, poison sumac, mango rind, or cashew shell oil.
There is some concern that ginkgo leaf extract might increase the risk of bruising and bleeding. Ginkgo thins the blood and decreases its ability to form clots. A few people taking ginkgo have had bleeding into the eye, brain, and lungs and excessive bleeding following surgery. Ginkgo leaf extract can cause allergic skin reactions in some people.
Ginkgo LEAF EXTRACT is POSSIBLY SAFE when used intravenously (by IV), short-term. It has been used safely for up to 10 days.
The ROASTED SEED or CRUDE GINKGO PLANT is POSSIBLY UNSAFE when taken by mouth. Eating more than 10 roasted seeds per day can cause difficulty breathing, weak pulse, seizures, loss of consciousness, and shock.
The FRESH SEED is LIKELY UNSAFE when taken by mouth. Eating fresh ginkgo seeds could cause seizures and death. Fresh seeds are poisonous and are considered dangerous. Eating fresh ginkgo seeds could cause seizures and death.
There isn't enough reliable information available to know if ginkgo is safe when applied to the skin.
Special Precautions & Warnings:
Pregnancy and breast-feeding:
Ginkgo is POSSIBLY UNSAFE when taken by mouth during pregnancy. It might cause early labor or extra bleeding during delivery if used near that time. Not enough is known about the safety of using ginkgo during breast-feeding. Do not use ginkgo if you are pregnant or breast-feeding.
Infants and children:
Ginkgo leaf extract is POSSIBLY SAFE when taken by mouth for a short time. Some research suggests that a specific combination of ginkgo leaf extract plus American ginseng might be safe in children when used short-term. Do not let children eat the ginkgo seed. It is LIKELY UNSAFE. The fresh seeds have caused seizures and death in children.
Ginkgo might make bleeding disorders worse. If you have a bleeding disorder, don't use ginkgo.
Ginkgo might interfere with the management of diabetes. If you have diabetes, monitor your blood sugar closely.
Seizures: There is a concern that ginkgo might cause seizures. If you have ever had a seizure, don't use ginkgo.
Deficiency of the enzyme glucose-6-phosphate dehydrogenase (G6PD):
Ginkgo might cause severe anemia in people have G6PD enzyme deficiency. Until more is known, use cautiously or avoid using ginkgo if you have G6PD deficiency.
Ginkgo use might interfere with getting pregnant. Discuss your use of ginkgo with your healthcare provider if you are trying to get pregnant.
Surgery: Ginkgo might slow blood clotting. It might cause extra bleeding during and after surgery. Stop using ginkgo at least 2 weeks before a scheduled surgery.
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