An older adult who was discharged from the hospital two days ago is brought to the emergency department because of the sudden onset of confusion. After the patient is stabilized, which action by the nurse is most important?

Choice A rationale While nutritional supplements can interact with medications or cause side effects, a sudden onset of confusion two days post-discharge strongly suggests an acute physiological or pharmacological cause. New or changed medications or an infection are much more probable immediate causes for acute mental status change in a recently hospitalized older adult. Choice B rationale New medications or changes in dosage often cause acute adverse effects in older adults due to age-related physiological changes that impair drug metabolism (hepatic) and excretion (renal), leading to higher plasma concentrations and potential toxicity. This is a common and critical cause of acute confusion (delirium) following hospital discharge, making it the most important initial assessment. Choice C rationale Gait abnormalities are relevant for assessing fall risk or chronic neurological conditions but are not the most immediate or essential step after stabilization for acute confusion. While gait assessment is important, it is secondary to identifying and reversing the immediate cause of the delirium. Choice D rationale A dementia screening test assesses for chronic cognitive decline. Sudden onset of confusion is characteristic of delirium, an acute and potentially reversible medical emergency, not dementia. The priority is to identify and treat the underlying acute cause (e.g., medication toxicity, infection), not screen for chronic disorders.