Allegra is an antihistamine and could affect milk supply and Prilosec is used to reduce gastric secretions and should not interfere with breasfeeding. Let me take this opportunity to let the new people on the list that you should invest in (the price is right - don't think I'm allowed to quote it here) and purchase Tom Hales Medications and Mothers Milk book, it is invaluable to a practicing LC. Go to the following web site for more info: http://neonatal.ttuhsc.edu/lact/ It gets very receptive for people to keep asking med questions here when the answers are #1 prorbaly in the archives (did you check first?) and are most likely in Toms book, if they aren't in either, then post. Cindy Cindy Curtis,RN,IBCLC mailto:[log in to unmask] http://www.erols.com/cindyrn *********************************************** 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