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Published on: September 9, 2015
Vancomycin Dosing and Monitoring: Critical Evaluation of the Current Practice
1School of Pharmacy, Pacific University, 222 SE 8th Ave., Hillsboro, OR, 97123, USA. Fawzy.elbarbry@pacificu.edu.
Abstract:
After more than six decades of its use as the mainstay antibiotic for the treatment of multidrug-resistant Gram-positive bacterial infections, dosing and monitoring of vancomycin therapy have not been optimized. The current vancomycin therapeutic guidelines recommend empiric doses of 15-20 mg/kg administered by intermittent infusion every 8-12 h in patients with normal kidney function. Additionally, the guidelines recommend trough concentration of 15-20 mg/L as a therapeutic goal for adult patients with severe infections. This review critically discusses the current guidelines considering the basic pharmacokinetics and pharmacodynamics of vancomycin and the recent published reports from clinical studies. More in-depth discussion will be focused on (1) providing evidence of advantages of administering vancomycin by continuous infusion compared to intermittent infusion; (2) revising the current practice of trough-only monitoring versus the area under concentration-time curve (AUC); and (3) assessing the current practice of weight-based dosing versus AUC-based dosing. Using the gathered information presented in this paper, two user-friendly and scientifically based dosing strategies are proposed to improve the efficiency of vancomycin dosing while avoiding the risk of nephrotoxicity and minimizing the cost of therapeutic drug monitoring.
Insights
Optimizing vancomycin dosing is crucial for treating resistant infections. This review suggests continuous infusion and area under the concentration-time curve (AUC) monitoring for safer, more effective vancomycin therapy.
Area of Science:
- Pharmacology
- Infectious Diseases
- Clinical Pharmacy
Background:
- Vancomycin remains a critical antibiotic for multidrug-resistant Gram-positive infections.
- Current dosing and monitoring guidelines for vancomycin therapy require optimization.
- Established guidelines recommend empiric weight-based dosing and trough concentration monitoring.
Purpose of the Study:
- To critically evaluate current vancomycin dosing and monitoring guidelines.
- To compare continuous versus intermittent vancomycin infusion strategies.
- To assess the utility of area under the concentration-time curve (AUC) versus trough concentrations for vancomycin monitoring and dosing.
Main Methods:
- Review of pharmacokinetic and pharmacodynamic principles of vancomycin.
- Analysis of recent clinical studies on vancomycin therapy.
- Critical discussion of weight-based versus AUC-based dosing strategies.
Main Results:
- Evidence suggests advantages for continuous vancomycin infusion over intermittent administration.
- Area under the concentration-time curve (AUC) monitoring offers a more robust approach than trough-only monitoring.
- AUC-based dosing may provide a more accurate and effective strategy than traditional weight-based dosing.
Conclusions:
- Current vancomycin dosing and monitoring practices are suboptimal.
- Continuous infusion and AUC-based monitoring are recommended for improved efficacy and safety.
- Proposed user-friendly dosing strategies aim to enhance vancomycin therapy efficiency and reduce toxicity.
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