Background: The American Thoracic Society Guidelines recommend vancomycin as first line option for treatment of methicillin-resistant Staphylococcus aureus. Two studies have described the pharmacokinetics (PK) of intermittent intravenous (IV) vancomycin in adult people with cystic fibrosis (PwCF). Currently, there have not been any studies describing the PK of continuous infusion vancomycin in PwCF. Our study aimed to describe the PK of continuous infusion vancomycin in adult PwCF.
Methods: Included patients were adult PwCF, who were admitted to University of Utah Hospital between May 11, 2014 and August 31, 2020, and received continuous infusion vancomycin for the treatment of an pulmonary exacerbations. The primary outcome was to describe vancomycin clearance rate (CL ) and total daily dose (TDD). Secondary outcomes included rates of acute kidney injury (AKI), liver injury, and infusion-related reactions.
Results: Twenty patients were included in this study. The mean CL was 5.08 L/h on Day 3 and 4.58 L/h on Day 7 (p = .04), and the TDD increased from 2444 mg on Day 3 to 2556 on Day 7, although not statistically significant (p = 0.26). Zero patients experienced an AKI, two patients experienced liver injury, and no patients experienced infusion-related reactions.
Conclusions: This study demonstrates that continuous infusion vancomycin PK, namely CL , is similar to previously reported CL for intermittent dosed IV vancomycin in adult PwCF. This study suggests that continuous infusion vancomycin is likely safe to use in adult PwCF.
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