(1) generally occurs within 1~ 12 hours after eating ginkgo. The younger the age, the more serious the poisoning symptoms and the worse the prognosis. The course of disease is short and the development is fast.

(2) Mild poisoning, which is characterized by nausea, vomiting, abdominal pain, diarrhea, irritability and mental retardation due to the damage of toxins to the nervous system.

(3) Severe poisoning, in addition to the above symptoms, dyspnea and cyanosis, slight stimulation can cause convulsions, limb rigidity, loss of consciousness, coma and pulmonary edema. A few patients have peripheral nerve dysfunction and flaccid paralysis of limbs. Often died of respiratory and circulatory failure after poisoning 1~2 days.