Sindilizumab is generally referred to as Sindilizumab Injection, and the recommended usage is to administer it once in 21 days, which may affect its effectiveness if it is administered for more than a month. Sindilizumab Injection is an immune checkpoint inhibitor, or PD-1 inhibitor. Currently, according to the dosage requirements in the instructions for this drug, the recommended usage is to administer the drug once every 3 weeks (21 days) until disease progression occurs or intolerable toxicity occurs, rather than once every month, which may affect the efficacy of the drug. The rational use of medicines is very important for cancer patients, overuse of any of the drugs does not improve the treatment, but may increase the burden on the liver, kidney or digestive tract, it may cause serious consequences and adverse effects. Therefore, it is recommended that patients follow the doctor’s instructions for treatment and do not overuse or lack of medication.