Which finding indicates an adverse effect of cyclosporine therapy?

The indication of an adverse effect of cyclosporine therapy is primarily associated with the impact this immunosuppressive medication has on renal function. An elevated blood urea nitrogen (BUN) level, such as 24 mg/dL, suggests that there may be some degree of kidney impairment, which can be a known side effect of cyclosporine therapy. Cyclosporine can lead to nephrotoxicity, and monitoring renal parameters, such as BUN, is crucial in patients receiving this medication.

While other findings listed may indicate potential issues, such as low white blood cell count, elevated glucose levels, or electrolyte imbalances, the specific level of BUN implies a direct concern regarding renal function, making it the most relevant indication of adverse effects from cyclosporine use. This highlights the need for careful monitoring of kidney function in patients undergoing treatment with this drug.