my daughter has had loads of ear infections when younger, amox didn't work, so put on omnicef, she was inconsolable, down right mean and upset, the paper given to us with med said to let dr. know if behavior changes. our dr. was closed so transferred to nurse line, they said no way from med. took to doctor next day, they put omnicef on her allergy list but said they'd never heard of that. now have7 months old son same situation, nurse says "NOT POSSIBLE SIDE EFFECT". i'm glad i looked it up and will be sure to let dr. know tomorrow,i'm not crazy nor the only one.