The nurse is caring for a client who lost his family in a fire. Upon entering the room, the client states angrily. "I hate this place. No one can help me." The nurse's best response would be:

C. Delirium is often reversible once the underlying cause is identified and treated (e.g., correcting electrolyte imbalances, managing infections, discontinuing medications contributing to delirium). With appropriate intervention, the mental status can improve, and the individual can return to their baseline cognitive function.

A. Dementia, on the other hand, is a chronic, progressive syndrome that primarily affects memory, thinking, behavior, and the ability to perform everyday activities. It does not typically cause acute changes in consciousness.

B. Memory impairment is a hallmark feature of dementia, especially in the early stages. In contrast, delirium primarily affects attention, awareness, and cognition acutely, with memory impairment being variable and not a defining feature.

D. Delirium develops rapidly, often over hours to days, in response to an acute medical condition, medication change, or other factors. It is characterized by a fluctuating course and can resolve once the underlying cause is managed.

D. Assessing the client is the nurse's first responsibility when a medication error is suspected. The nurse should promptly assess the client's condition to determine if any harm has occurred as a result of the error. This assessment includes vital signs, physical assessment, and evaluation of any signs or symptoms related to the medication error.

A. Documenting the medication error is important for accurate record-keeping and subsequent investigation. However, it should not be the nurse's first action. The priority should be to assess and address any potential harm to the client.

B. Calling the physician may be necessary depending on the severity of the error and the client's condition. However, it is not the first responsibility of the nurse in response to a suspected medication error. The nurse's primary concern should be the immediate assessment and management of the client's condition.

C. Notifying the supervisor or charge nurse is an important step to report the incident and seek guidance on next steps. Supervisors can assist in managing the situation, implementing corrective measures, and ensuring appropriate documentation and reporting procedures are followed. This is typically one of the first actions after ensuring the client's safety.