CTRP Terminology CTRP Disease Terminology Pediatric Adverse Events Terminology Pediatric Adverse Events Terminology Mapped to MedDRA CTCAE Adverse Events Version 4.0 Terminology Abnormal Blood Chemistry and Hematology Test Result Hyponatremia Hyponatremia Hyponatremia Lower than normal levels of sodium in the circulating blood. MedDRA C0020625 CTRP C37976 IMDRF:E120202 A disorder characterized by laboratory test results that indicate a low concentration of sodium in the blood. Hyponatremia Abnormally low level of sodium in the blood. FDA Laboratory or Test Result NICHD Lower than normal levels of sodium in the circulating blood. Hyponatremia Hyponatremia CDRH Health Effects - Clinical Signs and Symptoms or Conditions Terminology NICHD Terminology Neonatal Research Network Terminology