Correct Answer: B

Rationale: The correct instruction for a client with a prescription for Oxycodone/Acetaminophen is to avoid taking additional Acetaminophen while on this medication. Combining medications containing Acetaminophen can lead to exceeding the maximum recommended dose and increase the risk of liver toxicity. Therefore, it is crucial for the nurse to emphasize the importance of not taking extra Acetaminophen while on this prescription to ensure the client's safety and well-being.

Correct Answer: D

Rationale: A urine output of 200 mL in 8 hours indicates decreased kidney function, potentially due to Furosemide therapy. This finding can suggest inadequate renal perfusion and impaired drug clearance, necessitating immediate reporting to prevent further complications like electrolyte imbalances and worsening heart failure.

Correct Answer: A

Rationale: The correct instruction is to remove the nitroglycerin patch each evening to prevent tolerance. This allows for a 10- to 12-hour nitrate-free period daily, reducing the risk of developing tolerance to nitroglycerin. Cutting the patch in half, taking it off for a headache, or applying a new patch every 48 hours are not recommended practices for managing angina with nitroglycerin patches.

Correct Answer: D

Rationale: Metformin can lead to lactic acidosis, especially in individuals with impaired renal function. Monitoring the client's serum creatinine levels is crucial to assess kidney function because Metformin is eliminated by the kidneys, and impaired renal function can increase the risk of adverse effects.

Correct Answer: C

Rationale: Potassium 3.4 mEq/L is below the expected reference range and puts a client at risk for digoxin toxicity. Low potassium levels can lead to fatal dysrhythmias, especially in older clients taking Digoxin, as potassium plays a crucial role in the heart's electrical activity.