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Published on: February 22, 2019
Impact of removing gentamicin from an antibiotic restriction program
Abstract:
Prescribing physicians at our institution were required to obtain approval from the Section of Infectious Disease for use of gentamicin sulfate and other aminoglycosides. We studied the effect of removing gentamicin from the list of restricted antibiotics, noting that gentamicin usage increased while tobramycin sulfate usage decreased during the six-month period after decontrol, compared with the previous six-month period. However, the total amount of aminoglycoside antibiotics procured by the pharmacy did not change significantly. Indications for aminoglycoside use, pretreatment evaluation of the patient (other than an initial serum creatinine determination), and rates of nephrotoxicity during treatment did not change. Decontrol of gentamicin resulted in lower aminoglycoside costs for the pharmacy without apparent compromise in patient care.
Insights
Removing gentamicin sulfate restrictions increased its use while decreasing tobramycin sulfate use. Total aminoglycoside procurement and patient care, including nephrotoxicity rates, remained unchanged, leading to lower pharmacy costs.
Area of Science:
- Pharmacology
- Infectious Diseases
- Health Economics
Background:
- Gentamicin sulfate and other aminoglycosides required infectious disease approval for prescribing.
- Antibiotic stewardship programs often involve restrictions to optimize use and cost.
Purpose of the Study:
- To evaluate the impact of removing prescribing restrictions on gentamicin sulfate.
- To assess changes in aminoglycoside usage, costs, and patient safety outcomes.
Main Methods:
- Retrospective analysis of antibiotic procurement data before and after decontrol.
- Comparison of gentamicin and tobramycin sulfate usage patterns.
- Evaluation of nephrotoxicity rates and prescribing indications.
Main Results:
- Gentamicin sulfate usage increased, while tobramycin sulfate usage decreased post-decontrol.
- Total procurement of aminoglycosides did not significantly change.
- No significant changes observed in indications, pretreatment evaluations, or nephrotoxicity rates.
Conclusions:
- Removing prescribing restrictions for gentamicin sulfate lowered pharmacy costs.
- Decontrol did not negatively impact patient care or safety outcomes related to aminoglycoside use.
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