Metformin and CT Scan

There are new recommendations for metformin protocol with regards to contrast associated kidney injury:

• Do not recommend stopping metformin for patients with eGFR >30 mL/min/1.73 m2
• In patients with eGFR ≤30 mL/min/1.73 m2 or AKI, metformin should be held at the time of, or prior to, ICM administration, and should not be restarted for at least 48 hours and only then if kidney function remains stable (<25% increase compared with baseline creatinine) and the ongoing use of metformin has been re-assessed by the patient’s clinical team