List of β-lactam antibiotics
This is a list of common β-lactam antibiotics—both administered drugs and those not in clinical use—organized by structural class. Antibiotics are listed alphabetically within their class or subclass by their nonproprietary name. If an antibiotic is a combination drug, both ingredients will be listed.
Penams
Narrow-spectrum
β-lactamase-sensitive
- Benzathine penicillin (benzathine & benzylpenicillin)
- Benzylpenicillin (penicillin G)
- Phenoxymethylpenicillin (penicillin V)
- Procaine penicillin (procaine & benzylpenicillin)
- Pheneticillin
β-lactamase-resistant
Broad spectrum
Extended spectrum
Carboxypenicillins
Ureidopenicillins
Cephems
First generation (moderate spectrum)
Second generation (moderate spectrum)
With anti-Haemophilus activity
With anti-anaerobic activity
Third generation (broad spectrum)
Fourth generation (broad spectrum)
(With β-lactamase stability and enhanced activity against Gram-positive bacteria and Pseudomonas aeruginosa)
Fifth generation* (broad spectrum)
(Antipseudomonal in addition to activity against MRSA and VRE. *Not universally accepted nomenclature. )
Carbapenems and penems
(Broadest spectrum of β-lactam antibiotics)
Monobactams
- Aztreonam
- Tigemonam
- Nocardicin A
- Tabtoxinine β-lactam (does not inhibit penicillin-binding proteins)
β-lactamase inhibitors
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