1. A patient with chronic heart failure is being treated with a standard regimen of enalapril and furosemide. Which parameter would be most important for evaluating treatment efficacy? A. Serum potassium levels B. Daily weight measurement C. Blood pressure D. Heart rate Answer: B. Daily weight measurement Rationale: Daily weight measurement is crucial for patients with heart failure as it reflects fluid retention, which is a key indicator of the disease's progression and treatment efficacy. 2. When considering the pharmacokinetics of medications in elderly patients, which factor is most likely to influence drug distribution? A. Increased body fat composition B. Decreased renal function C. Enhanced hepatic metabolism D. Reduced cardiac output Answer: A. Increased body fat composition Rationale: In elderly patients, increased body fat can alter the distribution of lipophilic drugs, affecting their efficacy and potential toxicity. 3. In evaluating the effectiveness of antibiotic therapy for a patient with pneumonia, which outcome would indicate a successful treatment? A. Resolution of fever B. Normalization of white blood cell count C. Improvement in chest X-ray D. All of the above Answer: D. All of the above