A patient taking metformin (Glucophage) is scheduled for a radiographic scan with contrast dye. What instructions should you provide to this patient?
A) "Take the metformin as soon as the scan is completed."
B) "Stop taking the metformin at least 24 h before your scan."
C) "Stop taking the metformin for 3 days before and after the scan."
D) "Take your metformin the night before the scan, and resume after the test is completed."
Correct Answer:
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