causes of hyponatremia euvolemic
Euvolemic hyponatremia may also result from excessive water intake in the presence of Addison disease, hypothyroidism, or nonosmotic vasopressin release (eg, due to stress; postoperative states; use of drugs such as chlorpropamide, tolbutamide, opioids, barbiturates, vincristine, clofibrate, or carbamazepine).