Abstract

PurposeMeropenem and vaborbactam is an intravenous beta-lactam/beta-lactamase inhibitor combination antibiotic active against multidrug resistant gram-negative bacteria. It may be a suitable treatment for inpatient and outpatient management of infections, and the intravenous admixture stability is therefore important for optimal utilization. The purpose of this study was to determine the stability of meropenem and vaborbactam in polyvinyl chloride (PVC) infusion bags and elastomeric pumps at room and refrigerated temperatures. MethodsMeropenem and vaborbactam vials were reconstituted according to manufacturer instructions and diluted in PVC infusion bags to final concentrations of 4, 8, and 16 mg/mL and in elastomeric pumps to 11.4 mg/mL (n = 5 replicates per concentration and per temperature). PVC bags and elastomeric pumps were stored at room temperature (~24 °C) or in the refrigerator (~4 °C) and sampled over 12 and 144 h, respectively. Stability was defined as the duration that meropenem and vaborbactam concentrations remained ≥90% of the original concentrations. FindingsAll room temperature replicates across the tested concentrations retained meropenem and vaborbactam stability over 12 h and displayed concentration-dependent degradation. Refrigerated studies resulted in meropenem and vaborbactam stability at all tested concentrations up to 120 h. ImplicationsMeropenem and vaborbactam in PVC bags (4, 8, and 16 mg/mL) and elastomeric pumps (11.4 mg/mL) were stable for 12 h at room temperature and 120 h when refrigerated. These stability data allow for enhanced flexibility in the preparation, storage, wastage, and administration of meropenem and vaborbactam in the hospital and outpatient setting.

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