NCLEX Practice Question: Metformin (Glucophage) & HbA1c Monitoring

Preparing for the NCLEX-RN? Test your knowledge of metformin (Glucophage) and the laboratory tests used to monitor treatment effectiveness in type 2 diabetes mellitus. Diabetes medications and patient monitoring are frequently tested on the NCLEX. Read the question, choose the best answer, and review the detailed rationale to strengthen your pharmacology and nursing knowledge.

💡 NCLEX Tip

Remember:

HbA1c = Long-term blood glucose control (2–3 months)
Finger-stick blood glucose = Daily glucose monitoring
Serum creatinine/eGFR = Kidney function before and during metformin therapy

The NCLEX often distinguishes between monitoring medication effectiveness (HbA1c) and monitoring medication safety (renal function).