Nitaxan is the trade name of Thymefaxin, and its role in the treatment of malignant tumors is mainly to enhance patients’ immunity, delay recurrence and prolong survival. The main component of Nitazen is thymidine, and the mechanism of action is to enhance T-lymphocyte-mediated immune response. After completing all the treatment procedures of chemotherapy and radiotherapy, patients with malignant tumors can use Nitazen as maintenance treatment. Its main benefits are two: 1. Activation of the body’s anti-tumor immune response. Since the anti-tumor immune response is T-cell mediated, Zidaxian can enhance the anti-tumor immunity of patients to a certain extent and delay the recurrence of tumor. 2. Enhance the resistance of patients and avoid infection. After radiotherapy, the body resistance of malignant tumor patients is generally very poor. Ritalin can enhance the immune response, avoid viral and other microbial infections, and prolong the survival time of patients. In conclusion, the application of Ritalin in malignant tumors is in an adjuvant position and cannot replace the main treatments such as radiotherapy and chemotherapy, and is generally used as maintenance treatment after the completion of the main treatments.