Ginkgo ketone ester drop pills may have side effects such as stomach upset and nausea after taking them. Ginkgo Biloba Ketone Ester Drops is mainly used for the treatment of blood stasis-type chest paralysis (chest tightness and pain) and blood stasis-type mild cerebral arteriosclerosis caused by dizziness, coronary heart disease, angina pectoris and other symptoms. The post-marketing adverse reaction monitoring data of this drug show that the following adverse reactions can be seen. ① gastrointestinal system: nausea, vomiting, dry mouth, abdominal distension, abdominal pain, abdominal discomfort, hyperacidity, etc.; ② nervous system: dizziness, headache, etc.; ③ skin and its accessories: rash, itching, etc.; ④ cardiovascular system: chest tightness, palpitations, etc.; ⑤ other: fatigue, allergy or allergic-like reactions, etc.. Ginkgo ketone ester drops are composed of ginkgo ketone ester, which is prohibited for those who are allergic to its ingredients. Patients with heart failure should be cautious, pregnant women should be cautious, and patients with allergies should be cautious. Patients who need to use this drug should consult a professional doctor, under the guidance of the doctor to follow medical advice, reasonable use of medication.