Thymopentapeptide is mostly used in patients with malignant tumors when they have low immune function due to radiotherapy, chemotherapy or other reasons (e.g. autoimmune diseases such as rheumatoid arthritis, systemic lupus erythematosus, etc.). Thymopentapeptide can regulate the immune function of the body, it can induce the differentiation of T-cells in the body, accelerate the process of T-cell development, maturation and activation. Its adverse effects are mostly fever, dizziness, chest tightness, nausea and weakness, and patients with chronic hepatitis B may have elevated ghrelin. This drug is contraindicated in people who are allergic to it or who are undergoing immunotherapy (e.g. organ transplantation). This drug is often associated with impairment of liver function, so liver function should be checked regularly during treatment. In addition, the use of Thymopentin in combination with other drugs should be decided after consultation with a healthcare professional. If the condition requires thymopentin treatment, the doctor should formulate an individualized plan according to the specific condition after going to the hospital for a clear diagnosis, and should not use this drug blindly to avoid adverse effects on the body.