Pat: interesting that zantac and tagamet are contraindicated..you know they give them to infants..... briggs says that cimetidine( tagamat), as agent with similar activity ( to ranitidine- zantac) is considered to be compatable during breastfeeding by the American Academy of Pediatrics.... cimetidine - tagamat - was reclassed by american acad of peds in 1994... good luck...page 176- 179 for cimetidine and 763-764 for rantidine... patricia