Pharmacy Clinical Pharmacy 4

Question 1

A patient with community-acquired pneumonia (CAP) and penicillin allergy (anaphylaxis) requires antibiotic therapy. Which agent is most appropriate?

Accepted Answer

Azithromycin monotherapy for outpatient mild CAP

Answer

Amoxicillin-clavulanate

Answer

Ceftriaxone

Answer

Piperacillin-tazobactam

Question 2

What is the primary advantage of using pharmacokinetic/pharmacodynamic (PK/PD) modeling in antibiotic dosing?

Accepted Answer

It optimizes dosing to maximize efficacy while minimizing toxicity and resistance

Answer

It eliminates the need for drug level monitoring

Answer

It standardizes doses across all patient populations without adjustment

Answer

It replaces culture and sensitivity testing

Question 3

Which mechanism explains the nephrotoxicity of amphotericin B deoxycholate?

Accepted Answer

Direct binding to renal tubular cell ergosterol causing cytotoxicity and vasoconstriction

Answer

Blockade of tubular secretion transporters OAT1/OAT3

Answer

Immune-complex deposition in glomeruli

Answer

Inhibition of prostaglandin synthesis reducing renal perfusion

Question 4

A 55-year-old patient on warfarin starts taking St. John's Wort. What pharmacokinetic outcome is expected?

Accepted Answer

Decreased warfarin levels due to CYP3A4 induction

Answer

Increased warfarin levels due to inhibition of P-glycoprotein

Answer

No significant interaction with warfarin

Answer

Increased warfarin levels due to protein-binding displacement

Question 5

When counseling a patient on albuterol inhaler technique, which step is most critical for effective drug delivery to the lower airways?

Accepted Answer

Inhaling slowly and deeply while actuating the inhaler

Answer

Exhaling forcefully immediately after actuation

Answer

Shaking the inhaler only before the first use

Answer

Holding the inhaler upside down during inhalation

Question 6

A patient newly diagnosed with type 2 diabetes has an HbA1c of 9.2%. Per ADA guidelines, what is the initial pharmacotherapy recommendation?

Accepted Answer

Metformin plus a second agent or insulin depending on symptoms

Answer

Lifestyle modification alone for 3 months

Answer

Metformin monotherapy only

Answer

Insulin therapy exclusively given the high HbA1c

Question 7

Which lab value indicates adequate anticoagulation with unfractionated heparin (UFH) in venous thromboembolism treatment?

Accepted Answer

aPTT 1.5–2.5 times the control value

Answer

INR of 2.0–3.0

Answer

Anti-Xa level of 0.3–0.7 IU/mL

Answer

Platelet count above 150,000/μL