A patient who usually takes metformin (Glucophage) was switched to insulin immediately following an angiogram. Which patient finding indicates it is safe for the patient to switch back to metformin?
a. 24-hour urine output greater than 2 L
b. International normalized ratio is now less than 1.2
c. Weight is unchanged from that of 1 month ago
d. Fasting blood glucose level was less than 90 mg/dL for 2 days in a row
ANS: A
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