ATI Pharmacology Test Bank

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: B

Rationale: The INR (International Normalized Ratio) is the most important lab value to monitor in a client taking warfarin. Warfarin is an anticoagulant, and the INR reflects the effectiveness of anticoagulation therapy. Monitoring the INR helps ensure the client is within the therapeutic range to prevent both clotting and bleeding complications.

Correct Answer: B

Rationale: Blurred vision is a common adverse effect of digoxin and can indicate toxicity. Monitoring for visual changes is essential to prevent serious complications in clients taking digoxin.

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 correct instruction the nurse should include when teaching a client with a prescription for Loperamide is to 'Avoid activities that require alertness.' Loperamide can cause drowsiness, so clients should avoid such activities until they know how the medication affects them.