Sodium cytarabine capsule is a drug commonly used in neurology, it is relatively safe, adverse reactions are occasionally seen in the gastrointestinal tract, the degree is mild, the duration is short, there is basically no effect on respiration, pulse rate, blood pressure, occasionally there is a transient drop in blood pressure as well as insomnia, excitement, very few patients may have fever reactions after taking the drug, the symptoms can disappear after stopping the drug. This drug is a brain metabolic activator, which can enhance the function of the upward reticular activation system, reduce cerebral vascular resistance, improve cerebral blood circulation, and promote brain substance metabolism, and is used clinically more often, but long-term use may cause insomnia, nausea, dry vomiting, abnormal liver function, rash, fever, and decreased immunity, etc. It is recommended to follow medical advice and use the drug reasonably.