Aminoglycosides · Pharmacology

Which of the following is an early sign of aminoglycoside-induced nephrotoxicity?

  1. Sudden onset of complete anuria within 24 hours of the first dose
  2. Inability to concentrate urine and rise in serum creatinine
  3. Gross hematuria with red blood cell casts in the urine
  4. High fever and flank pain with costovertebral tenderness
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Correct answer: Inability to concentrate urine and rise in serum creatinine

Nephrotoxicity usually manifests as non-oliguric renal failure. The first signs are often a decreased urine concentrating ability followed by a gradual increase in serum creatinine and blood urea nitrogen (BUN).

Difficulty: Medium Question 17 of 20

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