Vancomycin Dosing in Chronic Kidney Disease with Staphylococcus aureus Infection

Introduction to Vancomycin Dosing

The Infectious Diseases Society of America recommends a vancomycin dose of 15-20 mg/kg/day adjusted according to the patient's creatinine clearance, with trough level monitoring to maintain levels between 15-20 μg/mL 1, 2

For patients with creatinine clearance >50 mL/min, the recommended dose is 15-20 mg/kg/day divided every 8-12 hours 1, 2
For patients with creatinine clearance 10-50 mL/min, the recommended dose is 15-20 mg/kg/day with extended interval (every 24 hours) 3
For patients with creatinine clearance <10 mL/min, the recommended dose is 15-20 mg/kg every 24-36 hours 3

Trough levels of vancomycin should be monitored before the fourth dose (in a 12-hour regimen) or before the third dose (in a 24-hour regimen) 1, 2
For severe infections such as bacteremia related to vascular access, trough levels should be maintained between 15-20 μg/mL to ensure an AUC/MIC >400 1, 2
More frequent monitoring should be performed in patients with unstable renal function or at risk of nephrotoxicity 4
The dose should be adjusted if trough levels exceed 20 μg/mL to reduce the risk of nephrotoxicity 4

Patients with chronic kidney disease have a higher risk of vancomycin-induced nephrotoxicity, especially with trough levels >20 μg/mL 5
Concomitant administration of other nephrotoxic agents should be avoided when possible 5
Renal function (serum creatinine) should be monitored at least twice a week during treatment 4
A loading dose of 25 mg/kg may be considered in severe infections to rapidly achieve therapeutic levels 1, 2

If trough levels exceed 20 μg/mL, consideration should be given to withholding the next dose and verifying new levels before continuing 4
When levels return to the target range (15-20 μg/mL), vancomycin can be resumed with a reduced dose (15-20%) or extended interval 4
Signs of nephrotoxicity, defined as an increase in serum creatinine ≥0.5 mg/dL or a 150% increase from baseline, should be monitored 4

Failing to adjust the dose despite elevated trough levels, which increases the risk of nephrotoxicity 4
Using fixed doses (such as 1g every 12h) instead of weight-based dosing 1, 2