I'm a 26 year old male and I'm on my 5th day of Omnicef (Cefdinir). As I have a Staph infection, there is no visability of improvement, but the following are my side affects so far.
Diarrea for the first three days, somewhat upset stomach, increased urge to urinate, somewhat decrease in moral, slight change in appetite and mild trouble sleeping. I noticed there were many children and older people postings so I wanted to represent my age bracket.