Last reviewed: November 2017
Last updated: November  2017

Summary

Definition

History and exam

Key diagnostic factors

  • past medical hx of mental illness or developmental disability
  • water-seeking and drinking

Other diagnostic factors

  • polyuria
  • headache or nausea
  • lethargy or confusion
  • seizures, delirium, or coma

Risk factors

  • mental illness
  • anxious, middle-aged women
  • developmental disability disorders
  • smoking

Diagnostic investigations

1st investigations to order

  • plasma osmolality
  • urine osmolality
  • urine sodium
  • serum sodium
  • 24-hour urine volume
  • urinalysis
  • serum BUN
  • water restriction test
Full details

Investigations to consider

  • vasopressin test
  • plasma ADH
  • CXR
Full details

Treatment algorithm

Contributors

Authors VIEW ALL

Shilpa Srinivasan

Associate Professor of Clinical Psychiatry

Department of Neuropsychiatry and Behavioral Science

University of South Carolina School of Medicine

Columbia

SC

Disclosures

SS declares that she has no competing interests.

Meera Narasimhan

Chair of the Department of Neuropsychiatry

Department of Neuropsychiatry and Behavioral Science

University of South Carolina School of Medicine

Columbia

SC

Disclosures

MN declares that she has no competing interests.

Dr Shilpa Srinivasan and Dr Meera Narasimhan would like to gratefully acknowledge Dr Emily Williams and Dr Brian Dundas, previous contributors to this monograph. EW and BD declare that they have no competing interests.

Peer reviewers VIEW ALL

Assistant Clinical Professor of Child Psychiatry

Yale School of Medicine

Medical Director of Psychiatry

Clifford W. Beers Guidance Clinic

New Haven

CT

Disclosures

PJvW declares that he has no competing interests.

Neuropsychiatric Hospital "Dr Ivan Barbot"

Popovaca

Croatia

Disclosures

BM is an author of a reference cited in this monograph.

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