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Fourth-generation cephalosporins, however, have true broad-spectrum activity. [23] The classification of cephalosporins into "generations" is commonly practised, although the exact categorization is often imprecise. For example, the fourth generation of cephalosporins is not recognized as such in Japan.
This section will review the drug development from one generation to the next with emphasis on the structural differences between the generations. The generation classification system relies on dividing the cephalosporins by their chemical properties and their relative activity against gram-negative versus gram-positive bacteria.
Cefuroxime axetil, sold under the brand name Ceftin among others, is a second generation oral cephalosporin antibiotic. It is an acetoxyethyl ester prodrug of cefuroxime which is effective orally. [2] The activity depends on in vivo hydrolysis and release of cefuroxime tablets. [citation needed] It was patented in 1976 and approved for medical ...
In the context of medical pharmacology, penicillins, cephalosporins, and carbapenems, while all have the β-lactam ring that serves as the fundamental structure, also have an auxiliary ring that carries a carboxylate group that is positioned on the same side as the carbonyl group within the β-lactam ring, and, as such, this structural ...
Cefuroxime, sold under the brand name Zinacef among others, is a second-generation cephalosporin [3] antibiotic used to treat and prevent a number of bacterial infections. [4] These include pneumonia , meningitis , otitis media , sepsis , urinary tract infections , and Lyme disease . [ 5 ]
Cefpodoxime is an oral, third-generation cephalosporin antibiotic available in various generic preparations. It is active against both Gram-positive and Gram-negative organisms with notable exceptions including Pseudomonas aeruginosa, Enterococcus, and Bacteroides fragilis.
Cefalexin is a β-lactam antibiotic within the class of first-generation cephalosporins. [4] It works similarly to other agents within this class, including intravenous cefazolin, but can be taken by mouth. [5] Cefalexin can treat certain bacterial infections, including those of the middle ear, bone and joint, skin, and urinary tract. [4]
Cefaclor, sold under the trade name Ceclor among others, is a second-generation cephalosporin antibiotic used to treat certain bacterial infections such as pneumonia and infections of the ear, lung, skin, throat, and urinary tract. It is also available from other manufacturers as a generic.
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