Correct Answer: C

Rationale: The correct instruction is to take levothyroxine on an empty stomach. This is necessary for proper absorption and effectiveness of the medication. Taking it with food can interfere with absorption. Timing is also crucial; it is usually recommended to take levothyroxine in the morning to prevent potential interactions with food and other medications throughout the day. Taking the medication in the evening may lead to sleep disturbances. Lastly, waiting to take the medication only when symptoms occur is not appropriate as levothyroxine is typically taken regularly to maintain thyroid hormone levels within the body.

Correct Answer: B

Rationale: The correct answer is B because methadone typically causes sedation and respiratory depression, not trouble sleeping. The statement about trouble sleeping indicates a need for further teaching. Choices A, C, and D are incorrect because understanding that methadone slows breathing, avoiding alcohol while taking the medication, and changing positions slowly to prevent dizziness are all appropriate client statements when prescribed methadone.

Correct Answer: B

Rationale: The correct answer is to instruct the client to reduce potassium intake. Clients with chronic kidney disease should limit potassium intake to prevent hyperkalemia, as the kidneys may struggle to remove excess potassium. Increasing protein intake between dialysis sessions (Choice A) is not recommended as it can increase urea production, adding to the workload of the kidneys. Avoiding iron supplements (Choice C) is not necessary unless iron levels are high. Expecting weight gain after each dialysis session (Choice D) is incorrect as patients typically experience weight loss due to fluid removal during dialysis.

Correct Answer: B

Rationale: Monitoring oxygen saturation levels is the most important intervention in this scenario. It ensures that the client is receiving adequate oxygenation, which is crucial for a client with pneumonia. By monitoring saturation levels, the nurse can promptly identify any oxygenation issues and adjust the oxygen delivery if necessary. Encouraging fluid intake, changing oxygen tubing daily, and assisting with frequent position changes are also important aspects of care for a client with pneumonia, but they are not as critical as monitoring oxygen saturation levels in ensuring immediate respiratory support.

Correct Answer: B

Rationale: Lethargy and confusion in a client with gastroenteritis are concerning findings that may indicate severe dehydration or electrolyte imbalance, requiring immediate intervention. While the other options are important, they do not pose an immediate life-threatening risk compared to the altered mental status in a client with gastroenteritis.