Clinical Results
FDA Approval
The FDA approval of Zerbaxa was based on the following studies:
Complicated intra-abdominal infections:
A multinational, double-blind enrolled 979 adults hospitalized with cIAI who were randomized to Zerbaxa (ceftolozane/tazobactam 1 g/0.5 g intravenously every 8 hours) plus metronidazole (500 mg intravenously every 8 hours) or meropenem (1 g intravenously every 8 hours) for 4 to 14 days of therapy. The primary efficacy endpoint was clinical response, defined as complete resolution or significant improvement in signs and symptoms of the index infection at the test-of-cure (TOC) visit which occurred 24 to 32 days after the first dose of study drug. The primary efficacy analysis population was the microbiological intent-to-treat (MITT) population, which included all patients who had at least 1 baseline intra-abdominal pathogen regardless of the susceptibility to study drug. The MITT population consisted of 806 patients. Zerbaxa plus metronidazole was non-inferior to meropenem with regard to clinical cure rates at the TOC visit in the MITT population; 83% and 87.3%, respectively.