A nurse is caring for a school-age child who is taking valproic acid. The nurse should expect the provider to order which of the following diagnostic tests?

• Cocaine is a powerfully addictive stimulant drug that increases the levels of dopamine in the brain, which is a chemical messenger related to movement, pleasure, and motivation.
• Cocaine's effects appear almost immediately and last for a few minutes to an hour, depending on the method of use. Some of the short-term effects of cocaine include extreme happiness and energy, mental alertness, hypersensitivity to sight, sound, and touch, and irritability.
• An elevated energy level is one of the most common and noticeable effects of cocaine use, as cocaine stimulates the central nervous system and makes the user feel more alert, active, and confident¹². This effect may also lead to increased physical activity, talkativeness, or aggression.

Therefore, option A is the correct answer, while options B, C, and D are incorrect.

Option B is incorrect because a powerful craving for more cocaine is not a behavior that can be observed by others, but rather an internal feeling that the user may experience due to the addictive nature of the drug.

Option C is incorrect because high self-esteem is not a typical effect of cocaine use, as cocaine may cause paranoia or anxiety in some users.

Option D is incorrect because euphoria is not a behavior that can be observed by others, but rather an emotional state that the user may feel due to the increased dopamine levels in the brain

A. Incorrect. Restricting fresh flowers from the client's room is not necessary for infection control purposes. However, some clients with pulmonary tuberculosis may have hypersensitivity reactions to certain plants or flowers, so the nurse should assess the client's allergies before allowing them in the room.

B. Incorrect. Maintaining a distance of 1.8 m (6 feet) from the client is not sufficient to prevent transmission of tuberculosis. Visitors should also wear a HEPA respirator and limit their contact time with the client.

C. Incorrect. A surgical mask is not adequate to protect the nurse from inhaling airborne droplet nuclei that contain Mycobacterium tuberculosis. The nurse should wear a high-efficiency particulate air (HEPA) respirator when providing client care.

D. Correct. Assigning the client to a private room with negative air pressure is the most effective way to prevent the spread of tuberculosis to other clients and staff members. The room should have at least six air exchanges per hour and an exhaust system that vents directly to the outside.