What is it?

Syndrome of inappropriate secretion of antidiuretic hormone (SIADH) refers to a condition which is characterized by secretion of too much vasopressin by the pituitary gland. Vasopressin causes the body to retain fluid, thus diluting the blood and causing low sodium levels. SIADH may be caused by certain types of tumors, brain conditions such as meningitis and encephalitis, lung diseases, and certain medications.

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Syndrome of inappropriate secretion of antidiuretic hormone.

Additional names

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Signs & symptoms

Symptoms may include confusion, hallucinations, irritability, nausea, vomiting, seizures and even coma.


Diagnosis is based upon findings from medical history and physical examination. Further evaluation may include blood and urine tests for electrolytes.


Treatment includes restriction of fluid intake, fluids with high amounts of sodium and treating the underlying cause.

☝️ This is not a substitute for professional medical advice. Please consult with your physician before making any medical decision.

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