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Cephalexin

Cephalexin suspension

CephalexinKEY POINTS

  • Cephalexin (Keflex) is a first-generation cephalosporin and beta-lactam antibiotic
  • Works by binding to penicillin-binding-proteins and interfering with cell wall synthesis in susceptible bacteria
  • Has activity versus methicillin-sensitive Staphylococcus aureus  (MSSA) and many Streptococcus species
  • Has activity versus sensitive Proteus spp., E. coli, and Klebsiella spp. – “PEcK”
  • Common use is skin and soft tissue infections
  • Cefazolin (Ancef) is the injectable counterpart of oral cephalexin
  • Frequency is usually 2-4 doses per day
    • Adjust doses for kidney dysfunction

RESOURCES

  • Cephalexin Package Insert
  • IDSA Practice Guidelines
  • Surgical Prophylaxis Guidelines

Free Antibiotic Cheat Sheet

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