If you take any medicines or supplements regularly, talk to your doctor before you start using ginkgo supplements. They could interact with blood thinners, aspirin, NSAID painkillers, anti-platelet drugs, anticonvulsants, antidepressants, diabetes medicines, drugs that affect the liver and supplements like garlic, saw palmetto, St. Johns wort, and yohimbe. Ginkgo might reduce the effectiveness of electroconvulsive therapy.