Correct Answer: A

Rationale: The correct answer is A: Liver function tests. Atorvastatin, an HMG CoA reductase inhibitor, can lead to hepatotoxicity, making it essential to monitor liver function tests regularly. Choices B, C, and D are incorrect because atorvastatin primarily affects the liver, not the kidneys, vision, or hearing.

Correct Answer: A

Rationale: The correct answer is A: 'Notify your provider if you experience restlessness or spasms of the face or neck.' Metoclopramide can lead to extrapyramidal symptoms such as restlessness or facial spasms, which are serious and require immediate medical attention. Choices B, C, and D are incorrect. Insomnia is not a common side effect of metoclopramide. Increasing fluid intake is usually recommended to prevent dehydration caused by potential side effects like diarrhea. Urinary frequency is not a typical side effect associated with metoclopramide.

Correct Answer: B

Rationale: The correct answer is B: Serum creatinine. Acetaminophen is metabolized by the liver, so serum creatinine levels should be monitored for potential hepatotoxicity. Monitoring serum creatinine can help detect liver damage, a potential adverse effect of acetaminophen. Choices A, C, and D are incorrect because serum glucose is not directly affected by acetaminophen, serum potassium is not typically monitored for acetaminophen adverse effects, and serum bilirubin is more related to bile metabolism rather than acetaminophen-induced hepatotoxicity.

Correct Answer: B

Rationale: The correct answer is B: Prothrombin time (PT). Warfarin is an anticoagulant medication that works by inhibiting the clotting factors dependent on vitamin K, such as factors II, VII, IX, and X. The prothrombin time (PT) measures the extrinsic pathway and is used to monitor the therapeutic effects of warfarin therapy. Monitoring PT helps assess the time it takes for the blood to clot, ensuring that the anticoagulant effect is within the desired range. Choices A, C, and D are incorrect because hemoglobin (Hgb) measures the amount of hemoglobin in the blood, bleeding time assesses the time it takes for bleeding to stop, and activated partial thromboplastin time (aPTT) is used to monitor heparin therapy, not warfarin therapy.

Correct Answer: B

Rationale: Visual disturbances such as blurred vision or seeing halos around lights are common signs of digoxin toxicity. Increased appetite, weight gain, and constipation are not typically associated with digoxin toxicity. Weight gain could be a sign of worsening heart failure rather than digoxin toxicity. Increased appetite and constipation are not specific signs of digoxin toxicity and are less likely to be related.