Radioactive drugs commonly used in clinic are 13 1 iodine, 125 iodine, 32 phosphorus, 89 strontium and 90 strontium. Radioactive drugs refer to radionuclide preparations or their labeled compounds used for clinical diagnosis or treatment. Radioactive drugs are different from other drugs, and the radionuclides they contain can emit rays. For example, 13 1 iodine is used in the treatment of hyperthyroidism and thyroid cancer, 125 iodine is used in the treatment of radioactive particle implantation, 13 1 iodine is used in the experiment of iodine absorption rate, and strontium 89 is used in the treatment of systemic bone metastasis. The skin application of strontium 90 is usually the treatment of infantile cutaneous hemangioma. It is suggested that when using radioactive drugs, appropriate protective equipment should be adopted to prevent radioactive substances from entering the human body from respiratory tract, digestive tract, skin or mucosa, wounds and so on. Pose a threat to human health.