Ginkgo biloba is generally taken orally for 60-90 days to stop, but the specific according to the different conditions and the severity of taking time is not the same. Ginkgo biloba leaf for ginkgo biloba extract, the main components of the plant flavonoids, can selectively resist platelet activation factor caused by platelet aggregation and thrombosis, scavenging free radicals, improve the deformability of red blood cells. It has the efficacy of activating blood circulation, relieving pain, resolving turbidity and lowering lipid, mainly treating chest paralysis and heartache, stroke and hemiplegia, hyperlipidemia, etc. It can also be used for ear and eye blood flow and nerve disorders, various peripheral circulation disorders, and for memory loss and dementia. Ginkgo biloba is well tolerated, a very small number of patients may experience gastrointestinal discomfort, headache, lower blood pressure, allergic reactions, etc., generally do not require special treatment to alleviate. However, for ginkgo allergic body is not recommended to use this drug.