Correct Answer: B

Rationale: The correct answer is to instruct the client to increase their intake of potassium-rich foods. Furosemide, a loop diuretic, can lead to potassium loss, which may cause hypokalemia. Increasing potassium intake can help prevent this electrolyte imbalance. Choice A is incorrect because furosemide is usually taken in the morning to prevent sleep disturbances due to increased urination. Choice C is incorrect because a decrease in urine output could indicate a problem and should be reported immediately. Choice D is incorrect because furosemide is used to reduce swelling in the body, including the lower extremities, so expecting swelling is not appropriate.

Correct Answer: B

Rationale: The correct instruction for a client prescribed ferrous sulfate is to take it with fluids other than coffee or tea. Coffee and tea can hinder iron absorption, so it's important to take the medication with other types of fluids. Choice A is incorrect because strawberries and citrus fruits are sources of vitamin C, which actually enhance iron absorption. Choice C is incorrect because ferrous sulfate is usually recommended to be taken on an empty stomach for better absorption. Choice D is incorrect as doubling the dose of ferrous sulfate can lead to an overdose and severe side effects.

Correct Answer: B

Rationale: The correct answer is B because removing anti-embolism stockings for short periods prevents skin breakdown while ensuring that the stockings remain effective in promoting circulation. Choice A is incorrect because massaging lower extremities daily does not prevent DVT; instead, it may dislodge a clot. Choice C is incorrect as limiting intake of foods high in calcium does not prevent renal calculi; rather, it may help reduce the risk of kidney stones. Choice D is incorrect because encouraging the client to lie supine does not prevent constipation; instead, encouraging mobility and adequate fluid intake can help prevent constipation in immobile clients.

Correct Answer: B

Rationale: To ensure proper functioning of a chest tube, the nurse should keep the drainage system below chest level. This position allows for proper drainage by gravity and prevents backflow into the pleural space. Clamping the chest tube intermittently can lead to a buildup of pressure and should be avoided. Emptying the drainage chamber every 4 hours is important but not directly related to maintaining the chest tube's function. Applying sterile gauze around the insertion site daily is essential for infection prevention but does not specifically ensure the proper functioning of the chest tube.

Correct Answer: A

Rationale: The correct answer is A: Drinking grapefruit juice. Grapefruit juice can increase the risk of statin toxicity by interfering with the enzyme that metabolizes statin medications, leading to higher drug levels in the body. This interaction can potentially cause adverse effects. Therefore, patients should be advised to avoid consuming grapefruit juice while taking statins. Choices B, C, and D are incorrect. Consuming high-protein meals, exercising regularly, and taking the medication in the morning are not contraindicated while on statin therapy. In fact, following a healthy diet, engaging in physical activity, and taking the medication at a consistent time each day can be beneficial for patients prescribed statins.