The emergency department nurse admits a homeless client with pneumonia. Exhibits Which prescription should the nurse question?

Rationale: A. Aluminum hydroxide gel is generally safe in clients with severe kidney injury, as it acts as a phosphate binder to help manage hyperphosphatemia. Its use is appropriate in clients with extremely elevated BUN and creatinine to prevent further complications related to phosphate retention. B. Ferrous sulfate is prescribed for anemia; however, in acute kidney injury or severe renal impairment, oral iron can still be given to support erythropoiesis alongside erythropoietin therapy. Although monitoring is needed, this prescription is not immediately unsafe and does not need to be questioned initially. C. Gentamicin sulfate is an aminoglycoside antibiotic that is nephrotoxic. This client has critically elevated BUN and creatinine, indicating severe acute kidney injury or renal failure. Administering gentamicin in this context can worsen renal damage and precipitate further toxicity. Therefore, this prescription should be questioned, and alternative antibiotics that are safer in renal impairment should be considered. D. Erythropoietin is appropriate to treat severe anemia (hemoglobin 6.2 g/dL) in a client with kidney injury. Administering a single subcutaneous dose is safe and indicated to stimulate red blood cell production, especially before or during ongoing treatment for anemia.