Ginkgo biloba drops generally take how long is good, should be based on the needs of the disease, not a generalization. In general, patients need to go to the hospital after two weeks of medication, by the physician according to the changes in the condition of the adjustment of medication. Ginkgo biloba drops belong to the Chinese patent medicine, has the effect of activating blood circulation and removing blood stasis. It can be used to treat chest paralysis (chest pain), stroke, coronary heart disease and cerebral infarction caused by blood stasis and obstruction of the veins. Adverse reactions include nausea, dry mouth, abdominal pain, dizziness, skin rash, chest tightness, fatigue and other symptoms; caution in patients with heart failure; caution in pregnant women and allergies. Ginkgo biloba drops need to be standardized under the guidance of a professional physician to identify the evidence, if the symptoms do not improve should go to the hospital in a timely manner to avoid delays in the condition.