What are the main symptoms of delirium?

Updated: Apr 25, 2019
  • Author: Kannayiram Alagiakrishnan, MD, MBBS, MPH, MHA; Chief Editor: Glen L Xiong, MD  more...
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The main symptoms of delirium include the following:

  • Clouding of consciousness

  • Difficulty maintaining or shifting attention

  • Disorientation

  • Illusions

  • Hallucinations

  • Fluctuating levels of consciousness

  • Symptoms tend to fluctuate over the course of the day, with some improvement in the daytime and maximum disturbance at night. Reversal of the sleep-wake cycle is common.

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