B.G.
I don't know for sure, but I will tell you that I just posted the same type of question about a week or so ago... My son started antibiotics for strep and all of the sudden we were having accidents nightly, when we RARELY had them before. Same as your daughter, my son is four and has been potty trained for a year or so now... So it caught us off guard and we were curious if the antibiotics were somehow related. Can't say definitively, of course, but your situation makes me feel like perhaps were weren't losing our minds thinking it could be antibiotics. :-) He's off them for about 3 days now and we have had no accidents in 3 days. Hmmmm... Odd though, isn't it?