Radiographic and magnetic resonances contrast agents: Essentials and tips for safe practices

Table 8 Practical guidelines for safe contrast media-metformin interaction

Renal function (eGFR-indexed)	Action
Patients with normal renal function (eGFR ≥ 60 mL/min per 1.73 m2)	No need to withhold metformin
Patients with compromised renal function (eGFR ≥ 30 but ≤ 60 mL/min per 1.73 m2)	Withhold metformin for 48 h
	Re-institution after renal function monitoring
Patients with compromised renal function (eGFR < 30 mL/min per 1.73 m2)	Have not to be on metformin
	Consult nephrologist

eGFR: Estimated glomerular filtration rate.