Standardized gentamicin dosing enhances peak serum concentrations

Area of Science:

• Pharmacology and Therapeutics
• Infectious Diseases
• Clinical Pharmacy

Background:

• Empiric gentamicin dosing practices may lead to suboptimal serum concentrations.
• Optimizing gentamicin dosing is crucial for maximizing efficacy and minimizing toxicity.

Purpose of the Study:

• To evaluate a standardized gentamicin dosing protocol against empiric prescribing.
• To assess improvements in clinical effectiveness, peak serum concentrations, and target attainment.
• To monitor for gentamicin toxicity.

Main Methods:

• A before-after program effectiveness evaluation was conducted in non-critically ill patients (16-65 years) with stable renal function.
• A standardized intravenous gentamicin dose of 2 mg/kg every 12 hours was used in the intervention phase.
• Clinical response, serum concentrations (peaks and troughs), and toxicity were monitored.

Main Results:

• The standardized protocol achieved desired peak gentamicin concentrations in 97% of patients versus 59% in the control group (p < 0.001).
• Mean peak serum concentrations were significantly higher with the standardized protocol (16.1 mumol/L vs. 11.2 mumol/L; p < 0.001).
• No significant differences were observed in clinical effectiveness or the incidence of nephrotoxicity or ototoxicity.

Conclusions:

• A standardized gentamicin dosing protocol effectively increases the attainment of therapeutic peak serum concentrations.
• The protocol did not significantly alter clinical effectiveness or toxicity profiles.
• Further investigation into this standardized gentamicin dosing protocol is recommended.