Antimicrobials USMLE Step 1 Practice Questions
55 board-style USMLE Step 1 questions in Pharmacology. Each question shows the correct answer; create a free account for the full explanation and adaptive practice.
- USMLE Step 1 · medium49. A 34-year-old man with advanced HIV (CD4 count 45 cells/μL) presents with progressive dyspnea, fever 38.5°C, and hypoxemia (SpO2 88% on room air). Chest X-ray shows diffuse bila…
- USMLE Step 1 · medium50. A 37-year-old woman with pyelonephritis (BP 128/82, HR 98, Temp 38.2°C, WBC 14,200/μL, positive urine nitrites) is treated with ciprofloxacin. One week later, she presents with…
- USMLE Step 1 · medium51. A 19-year-old college student presents with fever (38.9°C), dry cough, and dyspnea. Vital signs show HR 102/min, RR 22/min, BP 118/76 mmHg, SpO2 94% on room air. Chest X-ray rev…
- USMLE Step 1 · medium52. A 69-year-old man with gram-negative sepsis is treated with gentamicin 5 mg/kg IV daily. After 5 days, he develops rising serum creatinine (2.8 mg/dL) and vertigo with ataxia. V…
- USMLE Step 1 · medium53. A 66-year-old man with methicillin-resistant Staphylococcus aureus bacteremia (blood cultures positive for MRSA) receives intravenous vancomycin infusion. Within 10 minutes, he…
- USMLE Step 1 · medium54. A 73-year-old hospitalized man with community-acquired pneumonia is treated with IV ceftriaxone. Two weeks into therapy, he develops watery diarrhea, cramping abdominal pain, an…
- USMLE Step 1 · easy55. A 7-year-old boy presents with acute otitis media (BP 105/68, HR 98, RR 22, Temp 38.5°C). Otoscopy reveals erythematous tympanum with fluid level; tympanometry confirms type B p…