Radiocontrast Agent - Adverse Effects - Drug Interactions

Drug Interactions

It has been recommended that metformin, an oral antidiabetic agent, be stopped for 48 hours following the intravascular administration of contrast media and that the use of metformin not be resumed until renal function has been shown to be normal. The reasoning is that if the contrast medium causes kidney failure (as happens rarely) and the person continues to take metformin (which is normally excreted by the kidneys), there may be a toxic accumulation of metformin, increasing the risk of lactic acidosis, a dangerous complication.

However, guidelines published by the Royal College of Radiologists suggest this is not as important for patients who receive less than 100 ml of contrast media and have normal renal function. If renal impairment is found before administration of the contrast, metformin should be stopped 48 hours before and after the procedure.

Read more about this topic:  Radiocontrast Agent, Adverse Effects

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