NCLEX RN Free Practice Questions Practice Question
The client has an order for Garamycin (gentamicin) to be administered. Which lab test should be done before beginning the medication?
Correct Answer: B
Rationale: Gentamicin, an aminoglycoside, is nephrotoxic. Serum creatinine is monitored before administration to assess baseline kidney function, as impaired renal function increases toxicity risk. Hematocrit, white cell count, and BUN are less specific for gentamicin.
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