Тазобактам

Tazobactam often is coadministered with piperacillin because of tazobactam's ability to inhibit β-lactamases. T azobactam, like other β-lactamase inhibitors, has little or no antibacterial activity. This effect is analogous to that of clavulanic acid and sulbactam.

White or off-white powder

b-lactamase inhibitor

ChEBI: A member of the class of penicillanic acids that is sulbactam in which one of the exocyclic methyl hydrogens is replaced by a 1,2,3-triazol-1-yl group; used (in the form of its sodium salt) in combination with ceftolozane sulfate for treatment of complicat d intra-abdominal infections and complicated urinary tract infections.

Tazobactam exhibits little useful antimicrobial activity, although weak activity against Acinetobacter spp. and Borrelia burgdorferi has been reported.

Tazobactam functions as an irreversible inhibitor by covalently binding to β-lactamases, and prevents the enzyme hydrolysis of ceftolozane, thereby enhancing its activity against resistant ESBL-producing pathogens, along with expanding coverage to include anaerobes (e.g., Bacteroides spp.)

Tazobactam is a penicillanic acid sulfone that is similar instructure to sulbactam. It is a more potent β-lactamaseinhibitor than sulbactam and has a slightly broader spectrumof activity than clavulanic acid. It has very weak antibacterialactivity. Tazobactam is available in fixed-dose, injectablecombinations with piperacillin, a broad-spectrum penicillinconsisting of an 8:1 ratio of piperacillin sodium to tazobactamsodium by weight and marketed under the trade name Zosyn.The pharmacokinetics of the two drugs are very similar. Bothhave short half-lives (t_1/2 ～1 hour), are minimally proteinbound, experience very little metabolism, and are excreted inactive forms in the urine in high concentrations.
Approved indications for the piperacillin–tazobactamcombination include the treatment of appendicitis, postpartumendometritis, and pelvic inflammatory disease caused byβ-lactamase–producing E. coli and Bacteroides spp., skin andskin structure infections caused by β-lactamase–producingS. aureus, and pneumonia caused by β-lactamase–producingstrains of H. influenzae.