Final answer:
The most appropriate action for a nurse admitting a client with dementia is to request a copy of the client's medication list from the long-term care facility to ensure accurate and current information.
Step-by-step explanation:
The question pertains to the best approach a nurse should take when admitting a client with a history of dementia and needing to obtain the client's medication records. The most appropriate action would be to request a copy of the client's medication list from the long-term care facility.
This ensures that the current and accurate medication regimen is received directly from the source of the client's most recent care. It is also a reliable method that reduces the risk of errors that could occur with verbal reports or relying on potentially outdated lists from family members or previous medical records.