NCLEX Trainer Test 6 Related

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The nurse is caring for a client with a history of type 2 diabetes who is receiving metformin (Glucophage) 500 mg PO bid. Which of the following laboratory results would be of GREATest concern to the nurse?

  • A. Creatinine 2.0 mg/dL.
  • B. Hemoglobin A1c 7.0%.
  • C. Potassium 4.0 mEq/L.
  • D. Fasting glucose 120 mg/dL.
Correct Answer: A

Rationale: A creatinine of 2.0 mg/dL indicates renal impairment, increasing the risk of lactic acidosis with metformin, requiring immediate evaluation. Options B, C, and D are less concerning: A1c 7.0% shows fair control, potassium 4.0 mEq/L is normal, and glucose 120 mg/dL is acceptable.