rn Please consult your physician before taking any medication. Brand name: Omnicef Generic name: Cefdinir Why is Omnicef prescribed? Omnicef is a member of the family of antibiotics known as cephalosporins. It is used to treat mild to moderate infections, including: Acute flare-ups of chronic bronchitis, Middle ear infections (otitis media), Throat and tonsil infections (pharyngitis/ tonsillitis), Pneumonia, Sinus infections, Skin infections. Omnicef may also be used for purposes other than those listed in this medication guide.