Cysteamine can be used to prevent and treat radiation sickness syndrome (manifested as nausea, vomiting, malaise, smell and taste disorders, etc.) caused by X-rays or other radiation energy. When the body is exposed to X-rays after applying this product, a large amount of free hydroxyl (OH) will be produced, thus appearing anti-oxidant effect. In addition, this product can also interact with certain enzymes in the body, thus making it stable to radioactive energy. It can also relieve the inhibition of metal on the activity of the enzyme system in the cell. It is used for acute tetraethyl lea poisoning, and the effect is good. It can relieve its symptoms (especially the nervous system symptoms), but the urinary lead excretion has not been increased.