An adult is admitted with acute flank pain, a 102° F (38.9° C) oral temperature, hematuria, dysuria, urgency, and fishy-smelling urine. Which admitting prescription(s) are most important for the nurse to implement? Select all that apply.

A. Diphenhydramine is unnecessary for diagnosing pyelonephritis. B. Urine culture confirms bacterial infection and guides antibiotic therapy. C. Forcing fluids may help but is not the priority over antibiotics and cultures. D. Broad-spectrum IV antibiotics are critical to treat systemic infection. E. Hemoglobin and hematocrit are not priority tests for pyelonephritis.