Correct Answer: A

Rationale: Prednisone can cause potassium depletion, so clients should increase their intake of potassium-rich foods such as bananas, oranges, and spinach. Potassium-rich foods help maintain electrolyte balance and prevent complications associated with low potassium levels, such as muscle weakness and irregular heartbeats.

Correct Answer: A

Rationale: St. John's wort can reduce the effectiveness of Warfarin by interacting with its metabolism pathways, potentially leading to decreased anticoagulant effects. Therefore, clients on Warfarin therapy should avoid St. John's wort. While echinacea, garlic, and ginseng are also herbal supplements that can interact with Warfarin, St. John's wort is particularly known for its significant impact on Warfarin metabolism.

Correct Answer: A

Rationale: Furosemide is a loop diuretic that can cause hypokalemia (low potassium levels) due to increased potassium excretion in the urine. Monitoring serum potassium levels is crucial to prevent complications such as cardiac arrhythmias. Therefore, the healthcare provider should closely monitor the client's serum potassium levels when they are prescribed Furosemide.

Correct Answer: C

Rationale: The correct answer is to instruct the client to avoid sudden discontinuation of Metoprolol. Metoprolol is a beta-blocker that should be tapered off gradually to prevent rebound hypertension and other cardiac issues. Abruptly stopping Metoprolol can lead to serious complications, so it is essential for the client to follow the healthcare provider's guidance on discontinuation.

Correct Answer: A

Rationale: The correct instruction for a client prescribed furosemide is to take the medication in the morning. Furosemide, a diuretic, is best taken in the morning to prevent nocturia, which is excessive urination at night. Taking it earlier in the day can help reduce disruptions to sleep patterns. Therefore, advising the client to take furosemide in the morning is crucial for optimal therapeutic effects.