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This is a new idea in some areas so it is best to talk to your doctor as to what they recommend. Basicaly.. there is a small chance that the metformin (and other diabetic medications) could crystalize in the kidneys causing damage. The policy where I work recommends not taking the medication for 48 hours after you get the dye injection. We dont have a hold for the medication before getting the dye.

If you are diabetic, ask your doctor if the medication you take has any restrictions when getting any kind of dye for a test. You may also ask the technologist doing your test, before the injection, what their policy is.

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Q: When is the use of the medication metformin with dye contrast cat scan to be discontinued and how long?
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