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A.
B.
A disturbance in attention (i.e., reduced ability to direct, focus, sustain, and shift atten- tion) and awareness (reduced orientation to the environment).
The disturbance develops over a short period of time (usually hours to a few days), rep- resents a change from baseline attention and awareness, and tends to fluctuate in se- verity during the course of a day.
. An additional disturbance in cognition (e.g., memory deficit, disorientation, language, visuospatial ability, or perception).
. The disturbances in Criteria A and C are not better explained by another preexisting, established, or evolving neurocognitive disorder and do not occur in the context of a severely reduced level of arousal, such as coma.
There is evidence from the history, physical examination, or laboratory findings that the disturbance is a direct physiological consequence of another medical condition, sub- stance intoxication or withdrawal (i.e., due to a drug of abuse or to a medication), or exposure to a toxin, or is due to multiple etiologies.
Specify whether:
Substance intoxication delirium: This diagnosis should be made instead of sub- stance intoxication when the symptoms in Criteria A and C predominate in the clinical picture and when they are sufficiently severe to warrant clinical attention.