Types with Common Indications

Natural Penicillins (Penicillin G and Penicillin V)

  • Strep Pharyngitis (including scarlet fever) Streptococcal Toxic Shock and Necrotizing Fascitis
    • Penicillin plus clindamycin (to decrease toxin synthesis)
  • Meningococcus Meningitis
  • Syphilis (Primary, 2ndary, and latent syphilis < 1 year duration)
  • Actinomycosis
  • Anthrax
  • Clostridial infections
  • Listeria
  • Pasteurella

Nafcillin, oxacillin, dicloxacillin

  • Agents of 1st choice for treatment of S. aureus and S. epidermidis that are not methicillin-reistant

Ampicillin, amoxicillin (+ clavulanate)

  • Upper Respiratory Infections (due to S. pyogenes, S. pneumoniae, H. influenzae)
    • Sinusitis
    • Otitis Media
    • Acute exacerbation of chronic bronchitis
  • Listeria


  • Infection following burns
  • Neutropenia

See Also


    Goodman & Gilman's Pharmacology

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