ID Board Review/Antimicrobial Therapy/Antibacterials/β-Lactams/Penicillins

Narrow Spectrum Penicillins

β-Lactamase Sensitive (First Generation)

• Penicillin G (PenG)
• Penicillin V (PenV)

β-Lactamase Resistant (Second Generation)

• Cloxacillin
• Oxacillin
• Nafcillin

Extended Spectrum Penicillins

Aminopenicillins (Third Generation)

• Amoxicillin
• Ampicillin

Carboxypenicillins (Fourth Generation)

• Ticarcillin

Ureidopenicillins (Fifth Generation)

• Piperacillin