Cedax (ceftibuten) belongs to a group of drugs known as cephalosporin antibiotics. This drug is used to treat bacterial infections. It works by fighting and killing vulnerable bacteria. It can treat mild to moderate bacterial infections. This drug has proved to be active against a wide range of bacteria that are associated with infections of the upper and lower respiratory tracts. In the presence of enzymes released by bacteria, which render some antibiotics like penicillin and amoxicillin ineffective, Cedax has shown to be highly effective.