I'm trying to help a mom who is scheduled to have a pulmonary CT (daughter is approx. 2 years and is primarily breastfed). The nurse informed her that the contrast agent they'll be using (Isovue 300, 100cc) is radioactive and she will be unable to nurse for 48 hours. Hale's 2002 has information on Isovue 128, which, from everything I've been able to find, is pretty much the same thing as Isovue 300. The nurse she spoke with told her that the difference is that the 128 is taken orally and the 300 is IV. She stated that the 300 can affect thyroid function in a nursing infant. Looking through the archives, I noticed that Dr. Newman mentioned that this agent is NOT radioactive, however the nurse told her that it -becomes- radioactive after the scan. Can anyone confirm or deny this? Does anyone have any information about this particular agent? Is it similar/same as Isovue 128 in composition, with the same risks/precautions? Kerry Luskey Minneapolis *********************************************** The LACTNET mailing list is powered by L-Soft's renowned LISTSERV(R) list management software together with L-Soft's LSMTP(TM) mailer for lightning fast mail delivery. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html