Цeфазолин натриевая сол

Описание

Cefazolin was synthesized by Fujisawa Pharmaceutical Co. in 1969. It was the first of the cephem antibiotics to introduce a thiadiazolylthiomethyl group at the 3 position and a tetrazole group at the 7 position in the side chain. Cefazolin is a parenteral cephem antibiotic showing better activity against gramnegative bacteria than cephalothin or cephaloridine. Its bactericidal activity, tissue distribution, and urinary excretion are excellent and it has wide clinical use.

Химические свойства

White to off-white powder

Использование

Semi-synthetic antibiotic derived from 7-amino-cepphalosporanic acid. An antibacterial

Определение

ChEBI: A cephalosporin organic sodium salt having [(5-methyl-1,3,4-thiadiazol-2-yl)sulfanyl]methyl and (1H-tetrazol-1-ylacetyl)amino side-groups.

Клиническое использование

Cefazolin (Ancef, Kefzol) is one of a series of semisyntheticcephalosporins in which the C-3 acetoxy function has beenreplaced by a thiol-containing heterocycle—here, 5-methyl-2-thio-1,3,4-thiadiazole. It also contains the somewhatunusual tetrazolylacetyl acylating group. Cefazolin wasreleased in 1973 as a water-soluble sodium salt. It is activeonly by parenteral administration.
Cefazolin provides higher serum levels, slower renalclearance, and a longer half-life than other first-generationcephalosporins. It is approximately 75% protein bound inplasma, a higher value than for most other cephalosporins.Early in vitro and clinical studies suggest that cefazolin ismore active against Gram-negative bacilli but less activeagainst Gram-positive cocci than either cephalothin orcephaloridine. Occurrence rates of thrombophlebitis followingintravenous injection and pain at the site of intramuscularinjection appear to be the lowest of the parenteralcephalosporins.