My 6 year old daughter was prescribed Omnicef for a upper respiratory infection.She took it for the prescribed time of 7 days with no problem,I thought.One day after she was done with the Omnicef she broke out into an awful rash,head to toe. Not thinking it had anything to do with the Omnicef,I took her to the ER.The Dr. said that this was an allergic reaction to Omnicef,even though it took 8 days to show itself. After reading some of the other post I remembered that she also hasn't been sleeping well.She woke up screaming on night and said that someone was in the bed with her.It all makes sense now.My child will never take this med. again!