List of β-lactam antibiotics
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![](http://upload.luquay.com/wikipedia/commons/thumb/f/f9/Beta-lactam_core_structures.svg/300px-Beta-lactam_core_structures.svg.png)
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[edit]
![](http://upload.luquay.com/wikipedia/commons/thumb/7/7c/Penicillin-G.png/220px-Penicillin-G.png)
![](http://upload.luquay.com/wikipedia/commons/thumb/6/63/Amoxicillin-2D-skeletal.png/220px-Amoxicillin-2D-skeletal.png)
Narrow-spectrum[edit]
β-lactamase-sensitive[edit]
- Benzathine
- benzylpenicillin (Penicillin G)
- Benzathine penicillin G
- Benzathine penicillin V
- Phenoxymethylpenicillin (penicillin V)
- Procaine penicillin
- Pheneticillin
β-lactamase-resistant[edit]
Broad spectrum[edit]
Extended spectrum (Antipseudomonal)[edit]
Carboxypenicillins[edit]
Ureidopenicillins[edit]
Cephems[edit]
![](http://upload.luquay.com/wikipedia/commons/thumb/6/61/Cephalosporin_C.svg/220px-Cephalosporin_C.svg.png)
![](http://upload.luquay.com/wikipedia/commons/thumb/1/1a/Cefoxitin.svg/220px-Cefoxitin.svg.png)
First generation (moderate spectrum)[edit]
Second generation (moderate spectrum)[edit]
cefuroxime, cefaclor, cefprozil
With anti-Haemophilus activity[edit]
With anti-anaerobic activity[edit]
Third generation (broad spectrum)[edit]
Fourth 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)
![](http://upload.luquay.com/wikipedia/commons/thumb/c/c8/Thienamycin.png/220px-Thienamycin.png)
Monobactams[edit]
![](http://upload.luquay.com/wikipedia/commons/thumb/4/4d/Aztreonam_structure.svg/220px-Aztreonam_structure.svg.png)
- Aztreonam
- Tigemonam
- Nocardicin A
- Tabtoxinine β-lactam (does not inhibit penicillin-binding proteins)
β-lactamase inhibitors[edit]
![](http://upload.luquay.com/wikipedia/commons/thumb/6/63/Clavulanic_acid.svg/220px-Clavulanic_acid.svg.png)