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Trade namesCefizox
  • (6R,7R)-7-{[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-methoxyiminoacetyl]amino}-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
Clinical data
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Chemical and physical data
Molar mass383.40 g·mol−1

Ceftizoxime is an antibiotic available for parenteral administration.[1]

It is in the third-generation cephalosporin family of medications and works by interfering with the bacteria's cell wall.[2] Unlike other third-generation cephalosporins, the whole C-3 side chain in ceftizoxime has been removed to prevent deactivation by hydrolytic enzymes. It rather resembles cefotaxime in its properties, but is not subject to metabolism.

It was removed from the US Market in 2007.


Injectable third generation cephalosporin antibiotic related to cefotaxime, q.v. Exhibits broad spectrum activity and resistance to β-lactamase hydrolysis.

Ceftizoxime synthesis:[3][4]


  1. Aldridge KE (1990). "An update on the in vitro activity of ceftizoxime and other cephalosporin/cephamycin antimicrobial agents against clinically significant anaerobic bacteria". Clinical Therapeutics. 12 Suppl C: 3–12. PMID 2202509.
  2. Beauduy, Camille E.; Winston, Lisa G. (2020). "43. Beta-lactam and other cell wall - & membrane - active antibiotics". In Katzung, Bertram G.; Trevor, Anthony J. (eds.). Basic and Clinical Pharmacology (15th ed.). New York: McGraw-Hill. p. 832. ISBN 978-1-260-45231-0. Archived from the original on 2021-10-10. Retrieved 2021-11-30.
  3. DE 2810922, Takaya T, Hisashi T, Kiyoshi T, Toshiyuki C, "New cepham compounds and processes for the production thereof", issued 29 August 1985, assigned to Fujisawa 
  4. US 4427674, Takaya T, Hisashi T, Kiyoshi T, Toshiyuki C, "Cephem compounds", issued 24 January 1984, assigned to Fujisawa 

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