Macrolides · Pharmacology

Which macrolide-like drug is specifically indicated for the treatment of Clostridioides difficile infection due to its minimal systemic absorption?

  1. Erythromycin
  2. Clarithromycin
  3. Fidaxomicin
  4. Telithromycin
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Correct answer: Fidaxomicin

Fidaxomicin is a macrocyclic antibiotic that inhibits RNA polymerase. It is poorly absorbed from the gut, allowing for high local concentrations in the colon to target C. difficile while sparing normal flora.

Difficulty: Medium Question 7 of 20

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