Correct Answer: C

Rationale: The correct answer is C, Warfarin. Aspirin increases the effect of anticoagulants like warfarin by inhibiting platelet aggregation, leading to an increased risk of bleeding. Therefore, the use of aspirin is generally contraindicated for clients taking warfarin.

Correct Answer: C

Rationale: The nurse should instruct the client to report a sore throat because it can indicate an infection due to the immunosuppressive effects of doxorubicin. In patients undergoing doxorubicin therapy, it is crucial to monitor for signs of infection promptly to prevent complications.

Correct Answer: A

Rationale: Prednisone can lead to potassium depletion, making it important for clients to increase their intake of potassium-rich foods like bananas, oranges, and spinach to prevent potential complications.

Correct Answer: B

Rationale: Amlodipine is a calcium channel blocker known to cause peripheral edema as an adverse effect. The nurse should monitor the client for swelling, particularly in the lower extremities, as it can indicate the development of this side effect.

Correct Answer: B

Rationale: The correct instruction for a client taking furosemide is to eat a diet high in potassium. Furosemide is a loop diuretic that can lead to potassium loss, potentially causing hypokalemia. Consuming foods rich in potassium can help maintain normal potassium levels in the body and counteract the potential side effect of furosemide.