Eravacycline, a newly approved fluorocycline
Abstract
Complicated intra-abdominal infections (cIAIs) are commonly associated with multimicroorganisms and treatment choices are becoming narrower due to developing resistance, especially in the gram-negative Enterobacteriaceae species. Eravacycline is a newly developed, fully synthetic tetracycline derivative that has shown potent broad-spectrum activity against a wide variety of microorganisms, including those such as extended spectrum β-lactamase producing Enterobacteriaceae and Acinetobacter. Eravacycline has shown activity against many gram-positive organisms such as methicillin-resistant S. aureus and vancomycin resistant Enterococcus faecalis and Enterococcus faecium (VRE), gram-negative organisms such as Escherichia coli, and anaerobic species of microorganisms such as Bacteroides. This fluorocycline has been compared to ertapenem and meropenem for the treatment of complicated intra-abdominal infections and levofloxacin for the treatment of complicated urinary tract infections. Eravacycline was shown to be noninferior to ertapenem but did not meet noninferiority criteria in comparison to levofloxacin. Oral and IV formulations on eravacycline were tested in clinical trials, but at this time, only the IV formulation is FDA approved. Eravacycline has been noted to have a half-life of 20 h with protein binding around 80%; AUC over minimum inhibitory concentration (MIC) has also been shown to be eravacycline's best predictor of efficacy. Of note, eravacycline does not require…
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