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Related Experiment Videos

Drugs that induce delirium.

I Karlsson1

  • 1Section of Psychiatry, Institute of Clinical Neuroscience, Göteborg University, Mölndal, Sweden.

Dementia and Geriatric Cognitive Disorders
|September 4, 1999
PubMed
Summary

Drug-induced delirium is common, with anticholinergic drugs posing the highest risk. Many medications can cause delirium, especially in elderly patients, highlighting the need to avoid high-risk drugs.

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Area of Science:

  • Pharmacology
  • Geriatrics
  • Clinical Toxicology

Background:

  • Drug-induced delirium is a frequent clinical issue.
  • Existing knowledge relies heavily on side effect reports, lacking systematic study.
  • Anticholinergic activity is a primary driver of delirium.

Purpose of the Study:

  • To systematically review drugs associated with delirium.
  • To categorize drug risks based on their potential to induce delirium.
  • To inform clinical practice regarding medication safety, particularly in vulnerable populations.

Main Methods:

  • Review of clinical practice reports and existing literature on drug side effects.
  • Classification of drugs into risk groups based on reported delirious reactions.
  • Analysis of drug properties, including anticholinergic activity and muscarinic receptor binding.

Main Results:

  • High-risk drugs include tricyclic antidepressants and high-dose neuroleptics due to anticholinergic effects.
  • Medium-high risk drugs include benzodiazepines, sedatives, and others, some binding to muscarinic receptors.
  • Elderly and demented individuals are particularly susceptible to drug-induced delirium.

Conclusions:

  • Avoidance of delirium-inducing drugs is crucial, especially in frail elderly and demented patients.
  • Understanding drug mechanisms, including anticholinergic and receptor binding properties, is key.
  • Further systematic research is needed to fully elucidate drug-induced delirium risks.

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