Correct Answer: A

Rationale: The correct answer is A: Serotonin syndrome. When a client takes St. John's wort, a herbal supplement, along with citalopram, a selective serotonin reuptake inhibitor (SSRI), there is a risk of developing serotonin syndrome. Serotonin syndrome is a potentially life-threatening condition characterized by symptoms such as confusion, agitation, fever, sweating, shivering, tremors, muscle rigidity, and in severe cases, seizures and coma. It is crucial for the nurse to monitor the client for these symptoms. Choices B, C, and D are incorrect because tardive dyskinesia is associated with long-term use of antipsychotic medications, pseudo-parkinsonism is a side effect of antipsychotic medications like haloperidol, and acute dystonia is a side effect of antipsychotic medications characterized by sustained muscle contractions.

Correct Answer: D

Rationale: The correct instruction for a client taking furosemide is to take the medication with meals. This helps prevent gastrointestinal upset and improves medication tolerance. Option A is incorrect because furosemide is a loop diuretic that can cause potassium depletion, so avoiding foods high in potassium is not necessary. Option B is incorrect as furosemide typically lowers blood pressure. Option C is incorrect because furosemide is a diuretic that promotes fluid loss rather than retention.

Correct Answer: B

Rationale: Administering an intermittent enteral feeding through a gastrostomy tube requires flushing the tube with 10 mL of sterile water before feeding. This action helps ensure patency and prevents clogging. Choice A is incorrect because flushing after feeding does not address the need for pre-feeding tube flushing. Choice C is unrelated to tube feeding administration. Choice D is incorrect as the height of the feeding bag above the abdomen is typically regulated by healthcare facility policies and is not a universal standard.

Correct Answer: A

Rationale: In a client with chronic kidney disease experiencing fluid volume overload, the nurse should expect a decreased blood pressure. Fluid volume overload can lead to poor cardiac output, which in turn can cause a decrease in blood pressure. Choices B, C, and D are incorrect. Increased urine output is not expected in fluid volume overload; decreased heart rate is not typically associated with fluid volume overload; and an increased heart rate is more commonly seen in response to fluid overload to compensate for the decreased cardiac output.

Correct Answer: A

Rationale: The correct answer is A: "I will avoid aspirin while taking this medication." Clients taking warfarin should avoid aspirin due to the increased risk of bleeding. Choice B is incorrect because increasing the intake of green leafy vegetables high in Vitamin K can interfere with the effects of warfarin. Choice C is incorrect because warfarin should not be taken with antacids as they can decrease its absorption. Choice D is incorrect because mild bruising is a common side effect of warfarin due to its anticoagulant properties.