Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 9/12/2025

Primary Antibiotics Associated with Clostridioides difficile Colitis

High-Risk Antibiotics

  • The World Journal of Emergency Surgery recommends avoiding the use of clindamycin, third-generation cephalosporins, penicillins, and fluoroquinolones due to their strong association with C. difficile infection (CDI) 1, 2
  • Third-generation cephalosporins are consistently implicated in CDI development across multiple studies and guidelines 1, 2
  • Penicillins, including ampicillin and amoxicillin, are frequently associated with CDI 2
  • Fluoroquinolones are strongly linked to CDI, particularly with the emergence of hypervirulent strains 1, 2

Risk Factors That Increase CDI Risk with Antibiotics

  • Prolonged antibiotic therapy, defined as treatment courses greater than 10 days, significantly increases CDI risk 2
  • Concomitant proton pump inhibitor (PPI) use has been epidemiologically associated with increased CDI risk 3

Lower-Risk Antibiotics

  • Parenteral aminoglycosides are less frequently implicated in CDI 1, 4
  • Sulfonamides have a lower association with CDI development 1, 4
  • Macrolides are less commonly associated with CDI 2
  • Tetracyclines and tigecycline have a lower risk of CDI compared to high-risk antibiotics 1, 4

Clinical Implications and Management

  • Discontinuing the inciting antibiotics is recommended when CDI is suspected or confirmed, if clinically possible 1, 4
  • Alternative antibiotic selection, choosing agents less frequently implicated with CDI, is recommended if continued antibiotic therapy is required for primary infection 1, 4
  • Discontinuing unnecessary PPIs in patients at risk for or with active CDI is recommended 3