http://www.wedgewoodpharmacy.com/mon...ronidazole.asp
Here is a link regarding metronidazole. I don't know if it helps, but you might read it over...There is a section that talks about side effects. I don't think the antibiotics are causing this, but read this and see what you think.
Could she be allergic to the i/d? Here is a link to the ingredients...Read them over and see if there's an ingredient in there that she might have allergies to...
http://www.hillspet.com/zSkin_2/prod...=1174101316595