Ceftriaxone is an antibiotic used to treat bacterial infections. It belongs to the class of cephalosporin antibiotics. Synonyms for ceftriaxone include Rocephin, Cefaxone, Monocef, Triaxone, and Ceftrix. These different names are brand names of different pharmaceutical companies that produce ceftriaxone. They are all chemically the same as ceftriaxone and are used to treat the same bacterial infections. Different brand names may have different prices depending on the company that produces them. However, it is important to note that ceftriaxone should only be used under the supervision of a licensed healthcare provider.