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.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Beta-lactam_core_structures.svg/300px-Beta-lactam_core_structures.svg.png)
Penams
editNarrow-spectrum
editβ-lactamase-sensitive
edit- Benzathine
- benzylpenicillin (Penicillin G)
- Benzathine penicillin G
- Benzathine penicillin V
- Phenoxymethylpenicillin (penicillin V)
- Procaine penicillin
- Pheneticillin
β-lactamase-resistant
editBroad spectrum
editExtended spectrum (Antipseudomonal)
editCarboxypenicillins
editUreidopenicillins
editCephems
editFirst generation (moderate spectrum)
editSecond generation (moderate spectrum)
editcefuroxime, cefaclor, cefprozil
With anti-Haemophilus activity
editWith anti-anaerobic activity
editThird generation (broad spectrum)
editFourth generation (broad spectrum)
edit(With β-lactamase stability and enhanced activity against Gram-positive bacteria and Pseudomonas aeruginosa)
Fifth generation* (broad spectrum)
edit(activity against MRSA and variably VRE. *Not universally accepted nomenclature. NO Antipseudomonal activity, mostly ceftriaxone coverage with additional MRSA and some VRE)
Carbapenems and penems
edit(Broadest spectrum of β-lactam antibiotics)
Monobactams
edit- Aztreonam
- Tigemonam
- Nocardicin A
- Tabtoxinine β-lactam (does not inhibit penicillin-binding proteins)