Side effects of butylphthalide sodium chloride injection include transaminase abnormalities, respiratory tract infections, urinary tract infections, dizziness, and headache, and the medication should be used in accordance with physician’s instructions. Butylphthalide Sodium Chloride Injection can improve central nervous system function in patients with acute ischemic stroke, but the drug may also produce multi-system side effects, such as transaminase abnormalities, respiratory tract infections, urinary tract infections, dizziness, headache, chest tightness, dyspnea, diarrhea, itching of the skin, skin rashes, weakness, worsening of symptoms, creatinine elevation, coagulation dysfunction, and platelet lowering. This drug is contraindicated in people who are allergic to this product and the ingredients contained in it, and is used with caution in patients with bradycardia, sick sinus syndrome, severe bleeding tendency. The occurrence of the above side effects is individualized. Physicians need to observe the patient’s symptoms after the use of the drug, if any obvious adverse reactions occur, need to stop the drug treatment in time.