A client who takes metformin is scheduled for a CT scan with iodinated contrast. What instruction is appropriate?

Question

Accepted Answer

B. Hold metformin as directed around the contrast study and monitor kidney function — Metformin may need to be held around iodinated contrast due to risk of lactic acidosis if renal function worsens. Follow facility protocol and provider instructions regarding timing and renal labs.

Answer

A. Take an extra dose of metformin before the scan

Answer

C. Stop all insulin for 24 hours after the scan

Answer

D. Increase dietary potassium before the scan