An older adult patient takes multiple medications daily. Over 2 days, the patient developed confusion, slurred speech, an unsteady gait, and fluctuating levels of orientation. These findings are most characteristic of

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Delirium is characterized by an abrupt onset of fluctuating levels of awareness, clouded consciousness, perceptual disturbances, and disturbed memory and orientation. The onset of dementia or Alzheimer's disease, a type of dementia, is more insidious. Amnestic syndrome involves memory impairment without other cognitive problems.

An Older Adult Patient Takes Multiple Medications Daily