Antimicrobials and Resistance · USMLE Step 1

A patient is prescribed imipenem. Why must cilastatin be co-administered?

  1. Prevents drug-induced seizures
  2. Enhances renal drug excretion
  3. Inhibits renal dehydropeptidase I
  4. Blocks β-lactamase binding sites
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Correct answer: Inhibits renal dehydropeptidase I

Cilastatin inhibits renal dehydropeptidase I, preventing imipenem degradation and increasing its effectiveness.

Difficulty: Medium Question 3 of 20

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