SIADH stands for Syndrome of Inappropriate Antidiuretic Hormone.
What does SIADH mean?
excess antidiuretic hormone causing water retention and low sodium
SIADH stands for syndrome of inappropriate antidiuretic hormone secretion, a condition in which the body releases too much antidiuretic hormone (ADH), also called vasopressin. The excess ADH makes the kidneys hold on to too much water, which dilutes the blood and lowers the sodium level, causing hyponatremia. Common causes include certain cancers, lung disease, brain conditions, and some medications. Treatment usually starts with fluid restriction. It is, in effect, the opposite of diabetes insipidus.
When is SIADH used?
SIADH is documented in general medical, endocrinology, and critical care notes when investigating low sodium.
Frequently asked questions
What does SIADH stand for?
SIADH stands for syndrome of inappropriate antidiuretic hormone secretion.
What does SIADH do to sodium?
The excess antidiuretic hormone makes the kidneys retain water, which dilutes the blood and lowers the sodium level.
What causes SIADH?
Common causes include certain cancers, lung disease, brain conditions, and some medications.
How is SIADH different from diabetes insipidus?
SIADH involves too much antidiuretic hormone with water retention, while diabetes insipidus involves too little, with excessive urination.