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Cefoxitin

Cefoxitin 1gmCefoxitin 2gm

KEY POINTS

  • Cefoxitin (Mefoxin) is widely mistaken for a second generation cephalosporin, but it is actually a cephamycin.
  • Works by inhibiting bacterial cell wall synthesis by binding to one or more penicillin-binding-proteins, which interferes with bacterial cell wall synthesis
  • Has activity versus some Gram positive aerobes (including methicillin-sensitive Staphylococcus aureus), some Gram negative aerobes and numerous anaerobic bacteria
    • Activity versus Gram negative anaerobe Bacteroides fragilis is variable
  • Has activity versus some Mycobacterium abscessus isolates
  • May be used for a variety of indications, including gas gangrene, intra-abdominal infections, pelvic inflammatory disease, surgical prophylaxis and more
  • Doses range from 1gm every 8 hours to 2gm every 6 hours, usually not exceeding 12gm per day
    • Requires adjustment for renal function
    • Can be given intravenous or intramuscular
  • Beware allergy and gastrointestinal side effects

RESOURCES

  • Cefoxitin Package Insert
  • IDSA Practice Guidelines
  • Clinical Practice Guidelines For Antimicrobial Prophylaxis In Surgery
  • ATS/IDSA Non-Tuberculosis mycobacterium Treatment Guidelines

Free Antibiotic Cheat Sheet

Study Guide

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