You may have to pause your cancer treatment until your doctor can get your sodium under control. SIADH, as its name suggests, is an inappropriate secretion of antidiuretic hormone (ADH).

ADH is responsible for telling the kidneys to hold on to water to keep the balance of sodium and water in the body. With diabetes insipidus, there is a problem with the signal to hold on to water ...

Vasopressin (a.k.a. ADH or antidiuretic hormone ... Tolvaptan has been shown in more than one clinical trial to raise sodium levels, however mortality and rehospitalization was not improved ...