Correct Answer: B

Rationale: When administering a Serotonin Antagonist, monitoring mental status changes is crucial. Serotonin Antagonists can affect neurological function, potentially leading to alterations in mental status. It is essential to assess for any changes in behavior, mood, or cognition to ensure patient safety and prompt intervention if needed.

Correct Answer: A

Rationale: Metoprolol, a beta-blocker, can cause dizziness, especially when starting the medication. The nurse should inform the client to change positions slowly to avoid dizziness and falls.

Correct Answer: B

Rationale: The nurse should obtain the blood sample for the peak serum level at 1030. This timing allows for 30 minutes to elapse after the completion of the 1-hour IV infusion, which is the recommended window for obtaining the peak serum level of gentamicin.

Correct Answer: D

Rationale: Metformin exerts its effects by decreasing hepatic glucose production, increasing sensitivity to insulin, and decreasing intestinal glucose absorption. These actions help in lowering blood glucose levels and improving insulin sensitivity in individuals with diabetes.

Correct Answer: D

Rationale: Furosemide, when administered intravenously, should be given slowly over 2 minutes to reduce the risk of ototoxicity, a known adverse effect of rapid infusion. This method allows for better monitoring of the client's response and decreases the likelihood of adverse reactions associated with a faster administration rate.