Patients with aplastic anemia can use thymic pentapeptide, which has the effect of regulating the body’s immunity and is mainly used for people with low immune function. The main active ingredients of thymic pentapeptide are five amino acids: arginine, lysine, aspartic acid, valine and tyrosine. It is suitable for the adjuvant treatment of chronic hepatitis B, various primary or secondary T-cell deficiency diseases, rheumatoid arthritis, systemic lupus erythematosus and other autoimmune diseases, as well as a variety of cellular immune deficiency diseases and tumors. It is contraindicated in patients with allergic reactions to the product or organ transplant recipients, and is contraindicated in patients who have been treated with immunosuppressive therapy (e.g., organ transplant recipients). Generally well tolerated, individual can be seen nausea, fever, dizziness, chest tightness, weakness and other adverse reactions, a few patients occasionally drowsiness. Patients with chronic hepatitis B may experience a transient increase in aminotransferase levels, but may continue to use the drug if there is no sign of liver failure. Liver function should be checked regularly during treatment; use with caution in lactating women and pregnant women; use with caution in people under 18 years of age. Thymopentapeptide clinical application has certain adverse reactions, it is recommended to use under the guidance of a doctor.