It is produced by the strain of Semisynthetic first generation cephalosporin for injection. Cefathiamidin has better antibacterial activity than cefazolin, cefuroxime and cefamidin against Streptococcus pneumoniae, Streptococcus pyogenes, MSSA, MSSE and Moraxella mucosa inflammation, and it showed strong activity against enterococcus. Its MIC90 (2.0 ㎍/mL)is slightly weaker than vancomycin (1.0㎍/mL). It also has some activity to MRSA and MRSE.