Potassium iodine tablets are used to protect the thyroid gland from possible radiation injury caused by radioactive iodine, particularly during radiological emergencies. Radioactive iodine can be released into the environment during radiological emergencies, and when inhaled or ingested, it can lead to radiation injury to the thyroid, increasing the risk of thyroid cancer and other thyroid diseases. Potassium iodide works by saturating the thyroid gland, which helps block the absorption of radioactive iodine, thus reducing the risk of radiation damage to the thyroid. It is important to note that potassium iodide only protects the thyroid from radioactive iodine and does not protect other parts of the body from other kinds of radioactive material. Potassium iodide can be taken in various forms such as oral solution, syrup, uncoated tablet, or enteric-coated delayed-release tablet. It is crucial to take potassium iodide only when instructed by public health or emergency authorities, as it can have harmful health effects if not needed or not taken correctly. Additionally, potassium iodide should only be used in accordance with FDA-approved products and under the guidance of a healthcare professional.