Syndrome Radiation Sickness Syndrome Patient Code (Appendix B) The complex of symptoms characterizing the disease known as radiation injury, resulting from excessive exposure (greater than 200 rads or 2 gray) of the whole body (or large part) to ionizing radiation. The earliest of these symptoms are nausea, fatigue, vomiting, and diarrhea, which may be followed by epilation, hemorrhage, inflammation of the mouth and throat, and general loss of energy. In severe cases, where the radiation exposure has been approximately 1000 Rad (10 gray) or more, death may occur within two to four weeks. Those who survive six weeks after the receipt of a single large dose of radiation to the whole body may generally be expected to recover. (U.S. Nuclear Regulatory Commission). C50723 C1709833 The complex of symptoms characterizing the disease known as radiation injury, resulting from excessive exposure of the whole body (or large part) to ionizing radiation. Radiation Sickness Syndrome Disease or Syndrome Radiation_Sickness_Syndrome FDA IMDRF:E2116 Radiation Sickness Syndrome Radiation-Related Non-Neoplastic Disorder CDRH Health Effects - Clinical Signs and Symptoms or Conditions Terminology