What action should a nurse take for an older client with Alzheimer's disease who is restless due to sleep deprivation?

Leaving a dim light on in the client's room at night is a sensitive and supportive approach for an older client with Alzheimer's disease who is experiencing restlessness due to sleep deprivation. People with Alzheimer's often experience confusion, especially in low-light conditions, which can exacerbate anxiety and restlessness. By providing a dim light, the client is offered a sense of security and might be less disoriented as they navigate their environment during the night.

This action encourages a more peaceful and safe atmosphere, reducing the fear and confusion that may otherwise contribute to restlessness. It aligns with promoting dignity and fostering a calming environment, which is crucial in caring for individuals with cognitive impairments.

The other choices do not effectively address the core issue of the client's restlessness due to sleep deprivation. Shutting the door could create feelings of isolation or entrapment, while applying restraints can lead to harm and reduces the client's autonomy. Administering sedative medication can mask symptoms but does not address the underlying issue and could lead to increased confusion or other side effects.