Beta-Lactam Antibiotics · Pharmacology

Biliary sludging or 'pseudolithiasis' is a unique adverse effect associated with high doses of:

  1. Ampicillin
  2. Ceftriaxone
  3. Piperacillin
  4. Ertapenem
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Correct answer: Ceftriaxone

Ceftriaxone can precipitate with calcium in the bile, forming a sludge that mimics gallstones on ultrasound. This is generally reversible once the antibiotic is discontinued.

Difficulty: Medium Question 18 of 20

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