Ginkgo ketone ester drop pills may cause bleeding in certain patients with hemorrhagic tendency or elderly people with brittle blood vessels. Ginkgo ketone ester drops belongs to Chinese patent medicine, which has the effect of activating blood circulation, removing blood stasis and clearing collaterals, and is a commonly used medicine in clinical practice. Modern medical research has found that ginkgo biloba ketone ester drops have the effect of antiplatelet aggregation as well as inhibiting platelet-activating factor antagonists, and are commonly used clinically in the treatment of blood stasis chest paralysis and blood stasis cerebral arteriosclerosis, such as coronary heart disease, angina pectoris, and the sequelae of cerebral stroke. Ginkgo ketone ester drops generally have relatively minor side effects, and individual patients may have adverse reactions such as stomach upset and nausea. Use with caution in heart failure, pregnant women and allergic individuals, and prohibited for those who are allergic to this drug. Patients with bleeding tendency or patients taking anticoagulant drugs should not take this drug, after taking may increase the risk of bleeding. For the elderly blood vessel brittleness is relatively large, it is best not to take for a long time to avoid causing bleeding. Ginkgo ketone ester drops should be taken in accordance with medical advice, and should not be taken blindly on its own.