A client with anemia secondary to chronic kidney disease (CKD) started a prescription for epoetin alfa two months ago. Which client finding best indicates that the medication is effective? Reference Range: Hemoglobin (Hgb) [14 to 18 g/dl. (8.7 to 11.2 mmol/L)]

A. Food diary shows increased consumption of iron-rich foods: While iron-rich foods are important for managing anemia, this finding does not directly indicate the effectiveness of epoetin alfa. The primary measure of epoetin alfa's effectiveness is an improvement in hemoglobin levels, not dietary changes. B. Reports of increased energy levels and decreased fatigue: Increased energy and decreased fatigue are positive effects and may suggest that the medication is helping. However, these symptoms are subjective and not as definitive as a measurable increase in hemoglobin levels. C. Takes concurrent iron therapy without adverse effects: Iron therapy is often used alongside epoetin alfa to enhance its effectiveness, but the absence of adverse effects from iron therapy does not alone confirm the effectiveness of epoetin alfa. The key indicator is the improvement in hemoglobin levels. D. Hemoglobin level increased to 12 g/dL (7.45 mmol/L): An increase in hemoglobin level to 12 g/dL is a direct measure of the effectiveness of epoetin alfa. This increase demonstrates that the medication is successfully stimulating red blood cell production, which is the intended therapeutic effect.