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delirium (acute confusional state)

delirium (acute confusional state) is a sudden change in a person's mental status, leading to confusion and unusual behaviour.

symptoms of delirium usually develop over the course of several hours to a few days. symptoms may fluctuate and often include:

  • confusion and disorientation, including hallucinations, delusions, or illusions.
  • disorganized thinking.
  • short attention span.
  • problems with the sleep-wake cycle.
  • periods of hyperactivity alternating with extreme sleepiness.

delirium may be caused by withdrawal from alcohol or drugs or medicines. the development or worsening of an infection or other health problem can also lead to delirium. people who have dementia are more prone to delirium.

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this information does not replace the advice of a doctor. healthwise, incorporated, disclaims any warranty or liability for your use of this information. your use of this information means that you agree to the terms of use and privacy policy. to learn more about healthwise, visit healthwise.org. © 1995-2022 healthwise, incorporated. healthwise, healthwise for every health decision, and the healthwise logo are trademarks of healthwise, incorporated.

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