Which laboratory test should a nurse monitor to check for toxic effects of foscarnet sodium?

Monitoring serum creatinine is essential when evaluating for potential toxic effects of foscarnet sodium, as this medication is known to have renal toxicity as a significant adverse effect. Foscarnet can lead to nephrotoxicity, resulting in impaired kidney function. Elevated serum creatinine levels can indicate a decline in kidney function, which the nurse must closely observe to prevent further complications and adjust treatment as necessary.

While liver function tests, a complete blood count, and an electrolyte panel provide important information about a patient’s overall health and monitor for different side effects associated with various medications, they are not specifically used to monitor the renal toxicity that can arise from foscarnet sodium. Therefore, tracking serum creatinine levels is the most relevant and direct method for detecting the possible nephrotoxic effects of this medication.