Antimicrobials and Resistance · USMLE Step 1

A man develops C. difficile colitis after broad-spectrum antibiotic use. Which drug is most appropriate?

  1. Oral metronidazole
  2. IV vancomycin
  3. Oral vancomycin
  4. IV cefepime
Show answer and explanation

Correct answer: Oral vancomycin

Oral vancomycin is first-line therapy because it stays in the gut lumen where C. difficile resides.

Difficulty: Medium Question 7 of 20

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