Final answer:
The laboratory value indicating an adverse effect of amphotericin B in a client with AIDS would be c. Hypokalemia, which is a drop in blood potassium levels commonly induced by the drug's impact on host cells and electrolyte balance.
Step-by-step explanation:
A nurse reviewing laboratory results for a client with AIDS taking amphotericin B for a fungal infection should be aware that one of the adverse effects of this medication is hypokalemia. Amphotericin B can cause several side effects due to its impact on fungal cell membranes as well as host cells. Indeed, it can disrupt the balance of electrolytes by causing renal tubular acidosis, which can lead to a decrease in potassium levels in the blood. Therefore, the value indicating an adverse effect of the medication in question would be c. Hypokalemia. Elevated liver enzymes would indicate hepatotoxicity, which is more commonly associated with flucytosine. An increased white blood cell count could be indicative of infection or inflammation but is not a known side effect of amphotericin B. Decreased creatinine would not typically indicate an adverse effect of amphotericin B, as creatinine levels are used to assess kidney function, and toxicity from this drug would more likely increase creatinine levels due to kidney damage.