Final answer:
To ensure safe use of an aminoglycoside antibiotic in a client with bacterial pneumonia, monitor serum creatinine levels.
Explanation:
When monitoring a client receiving an aminoglycoside antibiotic for bacterial pneumonia, the nurse should specifically watch the serum creatinine levels. Aminoglycosides can be nephrotoxic, potentially causing kidney damage, hence the importance of monitoring creatinine levels which reflect renal function.
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