Tehran University of Medical Sciences Archives of Anesthesiology and Critical Care 2423-5849 5 3 2019 07 02 77 80 Omid Arasteh Department of Clinical Pharmacy, School of pharmacy, Tehran University of Medical Sciences, Tehran, Iran. Hossein Khalili Department of Clinical Pharmacy, School of pharmacy, Tehran University of Medical Sciences, Tehran, Iran. Mohammad Taghi Beigmohammadi Department of Anesthesiology and Critical Care, Imam Khomeini Hospital, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran. Alireza Abdollahi Department of Pathology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran. Amirhooshang Mohammadpour Department of Clinical Pharmacy, School of pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran. Mohammadreza Salehi Department of Infectious Diseases, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran. 2019 07 02 Background: Vancomycin is a glycopeptide antibiotic that was extensively used for treatment of gram positive infections. Therapeutic drug monitoring (TDM) is recommended to optimize efficacy and safety of vancomycin. Data regarding TDM of vancomycin are scant in septic patients especially during augmented renal clearance (ARC) phase. Methods: In this observational study, 39 patients with diagnosis of sepsis that were in ARC phase were evaluated. The breakpoint for serum trough level of vancomycin was considered as 15 mg/l. The patients were stratified in two groups based on the measured serum trough levels (< 15 mg/l versus ≥15 mg/l). Results: Clinical response and microbiological clearance were compared between the groups. In terms of clinical response, there was no significant difference between the groups (P = 0.677). Also, the microbiological clearance was not different between the groups (P= 1.00). Conclusion: Septic patients during ARC phase had comparable clinical and microbial responses regardless of serum trough levels of vancomycin. https://aacc.tums.ac.ir/index.php/aacc/article/view/238 https://aacc.tums.ac.ir/index.php/aacc/article/download/238/416