Toxicology USMLE Step 1 Practice Question
A 38-year-old industrial worker presents with severe cramping abdominal pain, persistent vomiting, and hypotension (BP 85/52 mmHg, HR 110/min). He reports garlic odor on his breath following acute occupational exposure to an arsenic-contaminated insecticide. Serum arsenic level is elevated at 45 mcg/dL (normal <5). Urine output remains adequate. He denies respiratory symptoms. Which chelating agent is most appropriate for this acute arsenic poisoning?
Answer choices
- ADeferoxamine
- BSuccimer
- CProtamine sulfate
- DDimercaprolCorrect answer
- EMethylene blue
- FEdetic acid (EDTA)
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