euvolemic hyponatremia
"I am an ICU nurse, my mother has endstage cardiomyopathy with congestive heart failure (CHF).

Currently hospitalized in Memphis for CHF, she was being treated with diuretics but sodium got down to 115.  After trying 3% saline, causing more CHF, her cardiologist decided to try Vaprisol.

Doctors and pharmacists had only used it a couple of times. Within 2 days, sodium was up to mid 120's and they were able to aggressively diurese her.  Good results. She probably would not have lived thru this episode if not for this drug."