Contrast Media and Metformin: Drug Interaction Guide
Quick answer: This is a major interaction — avoid combining Contrast Media and Metformin unless specifically directed by your doctor.
How Contrast Media interacts with Metformin
Iodinated contrast media can cause acute kidney injury which reduces metformin renal clearance, increasing the risk of life-threatening lactic acidosis.
What you should do
Suspend metformin at time of contrast administration in patients with eGFR <60 mL/min/1.73m². Reassess renal function 48 hours post-contrast before resuming.
Key facts
Severity
Major — avoid combination
Mechanism
Iodinated contrast media can cause acute kidney injury which reduces metformin renal clearance, increasing the risk of l...
Action
Suspend metformin at time of contrast administration in patients with eGFR <60 mL/min/1.73m². Reassess renal function 48...
Frequently asked questions
Can I take Contrast Media and Metformin together?
No — this combination should generally be avoided. Suspend metformin at time of contrast administration in patients with eGFR <60 mL/min/1.73m². Reassess renal function 48 hours post-contrast before resuming.
What is the severity of this interaction?
The interaction between Contrast Media and Metformin is classified as Major — avoid combination. Iodinated contrast media can cause acute kidney injury which reduces metformin renal clearance, increasing the risk of life-threatening lactic acidosis.
What should I do if I'm prescribed both?
Suspend metformin at time of contrast administration in patients with eGFR <60 mL/min/1.73m². Reassess renal function 48 hours post-contrast before resuming. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.