Anti-radiation drugs are used by the organism before and after radiation to repair and relieve the damage caused by radiation to the body. Common drugs include: aminothioglycollate drugs, cytokine drugs, hormone drugs and so on. 1. Aminothioglycollate drugs: Aminothioglycollate drugs as the first generation of protective agents, its mechanism of action is to scavenge free radicals, hydrogen transfer, inducing tissue hypoxia and enhance the stability of DNA. Common drugs include N-acetylcysteine, aminophosphatidylin and so on. 2. Cytokine drugs: cytokines are a class of small molecule peptides synthesized and secreted by body cells. It has various biological activities, such as promoting wound healing and hematopoietic function, regulating body immunity. In radiation injury has a good preventive and therapeutic role, such as granulocyte monocyte colony-stimulating factor, interleukin and so on. 3. Hormone drugs: Hormone drugs are important radiation protection agents, which play a role in combining with the corresponding receptors, and have the functions of anti-inflammatory, antioxidant, anti-tumor and scavenging free radicals. It repairs the body’s blood system and immune system in the body to play the role of anti-radiation damage, common drugs are melatonin, prednisone, dexamethasone and so on.