Background: Vancomycin (VAN) is empirically used with other broad-spectrum antibiotics, such as piperacillin-tazobactam (PTZ) or carbapenem (CBP). However, conflicting literature on the rates of acute kidney injury (AKI) of VAN with PTZ has been reported.
Research design and methods: A multicenter, retrospective cohort study of the risk of AKI was conducted in patients receiving VAN and concomitant PTZ or CBP from January 2019 and June 2023.
Results: In total, 514 eligible patients were included. AKI occurred in a total of 91 patients (17.70%). The prevalence of AKI was significantly higher in the VAN+PTZ group than in the VAN+CBP group (23.37% vs 15.27%, p = 0.028). The survival curves depicting the time to AKI showed the increased incidence and more rapid onset of AKI among patients in the VAN+PTZ group compared to those of the VAN+CBP group (HR 2.186, 95%CI 1.351-3.538, p = 0.0015). VAN+PTZ was associated with a consistently higher AKI rate over VAN+CBP (HR 1.762, 95%CI 1.111-2.795, p = 0.0161) throughout the 14-day combination therapy. VAN with concomitant PTZ, duration of combination therapy ≤ 4 days and VAN trough concentration > 20 mg/L were independent risk factors associated with AKI.
Conclusion: The prevalence of AKI was found to be higher in patients receiving VAN+PTZ therapy compared to those receiving VAN+CBP therapy based on creatinine-defined AKI.
Keywords: Acute kidney injury; carbapenem; piperacillin-tazobactam; risk factor; vancomycin.