Results from randomized, controlled clinical trials support the use of standardized leaf extracts of Ginkgo biloba for the symptomatic treatment of age‐associated memory impairment, dementia (including Alzheimer's disease), and intermittent claudication. Product selection is extremely important, as much of the published safety and efficacy data are based on 2 standardized extracts, both available in the US. The recommended dose of a Ginkgo biloba leaf extract (standardized to contain 24–26% flavonoid glycosides, 5–7% terpene lactones, and less than 5 parts per million ginkgolic acids) is 40 mg to 60 mg, 3 to 4 times a day. Daily administration of the extract for at least 4 to 6 weeks is required before the full therapeutic effects may be observed. While there are no known contraindications, due to potential platelet‐activating factor antagonism and inhibition of platelet aggregation, Ginkgo extracts should be used cautiously in patients receiving anticoagulant or antiplatelet therapy or having bleeding disorders. A number of bleeding episodes due to co‐administration of aspirin or warfarin have been reported. Other adverse reactions, such as nausea, vomiting, headaches, and dizziness have also been observed in clinical trials. Administration of Ginkgo biloba preparations to children or during pregnancy or nursing is not currently recommended.