Vancomycin-associated nephrotoxicity in adult medicine patients: incidence, outcomes, and risk factors.
OBJECTIVE
The prevalence of vancomycin-associated nephrotoxicity (VAN) is reported to vary from 1.0-42.6%, with most data from critically ill patients. Evaluation of VAN among internal medicine patients is lacking. Our objectives were to determine the incidence, time-course, outcomes, and risk factors of VAN in adult internal medicine patients.


METHODS
Retrospective cohort.


METHODS
Tertiary care academic medical center.


METHODS
A total of 125 adult internal medicine patients receiving vancomycin treatment with mean baseline creatinine clearance of 84.6 ± 27.6 ml/min.


METHODS
Vancomycin treatment for a minimum of 72 hours.


RESULTS
Nephrotoxicity, defined as an increase in serum creatinine of 0.5 mg/dl or 50% above baseline (whichever was larger), occurred in 17 (13.6%) of 125 patients. No patients with VAN progressed to Loss or End stage as defined by the RIFLE criteria. The incidence rate of VAN was 0.02 cases/day of vancomycin treatment. Nephrotoxicity developed at a median of 4.5 days (interquartile range [IQR] 2.2-4.9) peaked at 5.7 days (IQR: 3.8-9.6), and resolved in 70.6% of the cases within 16.5 days (IQR: 6.0-17.8) after onset. On multivariable logistic regression analysis, after controlling for hypotensive episodes, Charlson Comorbidity Index, and baseline creatinine clearance, concomitant use of piperacillin-tazobactam was associated with increased VAN (adjusted odds ratio 5.36, 95% confidence interval 1.41-20.5).


CONCLUSIONS
Vancomycin-associated nephrotoxicity is prevalent among internal medicine patients, with 5.36-fold higher odds if piperacillin-tazobactam is concomitantly administered.
School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Buffalo, New York.
Calvin J
CJ
Meaney
Lauren M
LM
Hynicka
Mona G
MG
Tsoukleris
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000900:Anti-Bacterial Agents / Q000009:adverse effects*; D015331:Cohort Studies; D005260:Female; D006801:Humans; D015994:Incidence; D007674:Kidney Diseases / Q000139:chemically induced* / Q000175:diagnosis / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012307:Risk Factors; D016896:Treatment Outcome; D014640:Vancomycin / Q000009:adverse effects*; D055815:Young Adult
D000900:Anti-Bacterial Agents; D014640:Vancomycin
infectious disease; internal medicine; nephrotoxicity; piperacillin/tazobactam; vancomycin