My 6 year old, 4 year old and myself a 35 year old were all placed on Omnicef for "upper respiratory infections". We all had the diarrhea, which I expected.... I had the yeast infection, however it seemed to spread to the "rear end" area. Even my young kids said it "hurt" when they had a bowel movement. I have been off this stuff for 2 weeks and we all still have "issues". I never want this antibiotic again!