Objective: The primary objective of this study was to evaluate the physical compatibility of ceftazidime-avibactam with selected intravenous antimicrobials during simulated Y-site administration.
Methods: Ceftazidime-avibactam (25 mg/mL) was mixed with select intravenous antimicrobials (tigecycline, metronidazole, meropenem, imipenem and cilastatin, fosfomycin, aztreonam and vancomycin) at an equal volume and evaluated using simulated Y-sites. Each admixture was evaluated immediately (0 hour) and after 1, 2, and 4 hours at room temperature (approximately 22°C) for visual characteristics, Tyndall beam, turbidity, pH, spectroscopic absorption of 550 nm and particle counts. If an admixture failed any one of these six assessments, it was considered incompatible.
Results: No evidence of incompatibility was observed between the combinations of ceftazidime-avibactam and the seven intravenous antimicrobials in simulated Y-site experiments.
Conclusion: Ceftazidime-avibactam was physically compatible with the selected intravenous antimicrobials (tigecycline, metronidazole, meropenem, imipenem and cilastatin, fosfomycin, aztreonam and vancomycin) in simulated Y-site administration.
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