Final answer:
The nurse should identify a BUN (blood urea nitrogen) level of 34 as an indication of an adverse effect of amphotericin B medication.
Step-by-step explanation:
Amphotericin B is a broad-spectrum antifungal drug that is used for systemic fungal infections. However, it can also produce side effects that affect the body's normal function. One of the adverse effects of amphotericin B is nephrotoxicity, which can lead to kidney damage. Therefore, the nurse should identify a BUN (blood urea nitrogen) level of 34 as an indication of an adverse effect of the medication.