Many people assume that because ginkgo biloba (ginkgo) is a "natural" product, that it is automatically free of side effects. However, this is simply not the case. In fact, ginkgo biloba contains certain toxins that can cause serious and even life-threatening problems. Some of the side effects that you should report to your healthcare provider right away include seizures, nosebleeds, and vision changes. Some side effects of ginkgo biloba are not as serious and are merely bothersome, such as an upset stomach, dizziness, and nausea.
(To read the full eMedTV article, click Ginkgo Biloba Side Effects. This article takes a detailed look at several possible side effects of ginkgo biloba, including a list of which side effects to report to your doctor right away.)