August 24, 2021
CT with Iodinated Intravenous Contrast
According to the American College of Radiology, the plasma half-life of intravenously administered iodinated contrast for CTs is approximately 2 hours, and less than 1% of the maternal dose is excreted into breastmilk in the first 24 hours. In addition, less than 1% of this small amount of contrast in the breastmilk is absorbed by the infant gut. Therefore, it is not recommended to interrupt breastfeeding after the lactating parent has a CT with contrast. There may be a change in the taste of the milk for a few hours after the CT, but it is not considered harmful to the child.
American College of Radiology. ACR Manual on Contrast Media. Administration of contrast media to women who are breast-feeding. 2021; 98-99: 2021 https://www.acr.org/-/media/ACR/Files/Clinical-Resources/Contrast_Media.pdf (accessed August 15, 2021)
Mitchell KB, Fleming MM, Anderson PO, et al ABM Clinical Protocol #31; Radiology and Nuclear Medicine Studies in Lactating Women Breastfeeding Med 14(5) 2019 Academy of Breastfeeding Medicine 290-294