Correct Answer: D

Rationale: Lithium toxicity can occur if levels become too high, especially if the client is dehydrated. Clients should be advised to avoid NSAIDs and maintain adequate hydration to prevent toxicity.

Correct Answer: C

Rationale: Donepezil helps improve cognitive function but is not a cure for Alzheimer's disease.

Correct Answer: B

Rationale: Spironolactone is a potassium-sparing diuretic, so the nurse should closely monitor for signs of hyperkalemia, which can lead to cardiac arrhythmias.

Correct Answer: D

Rationale: Effective diabetes management involves comprehensive care, including proper foot care, insulin administration technique, and maintaining carbohydrate consistency with meals. All of these interventions are critical in reducing hyperglycemic episodes and managing diabetes.

Correct Answer: D

Rationale: A CT scan can help confirm a pulmonary embolism and guide further treatment.