Systematic Review of Piperacillin-Tazobactam and Vancomycin Y-Site Compatibility: Consideration of Concentration and Solution Variability

Simultaneous administration of vancomycin and piperacillin-tazobactam (VPT) poses significant challenges related to physical and chemical compatibility, as well as clinical practice. A systematic review of available literature related to VPT Y-site compatibility was performed. Data was collected from primary and tertiary sources. Seven articles were included in addition to one internal assessment and one review article and information from tertiary drug databases. The literature supports the simultaneous administration via Y-site of piperacillin-tazobactam 33.75 mg/mL in normal saline (NS) and vancomycin 4 to 8 mg/mL in NS. The same drug products at differing concentrations, diluents, storage conditions, or preparations outside of this recommendation should be considered incompatible.