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Once-daily aminoglycoside therapy.

¹Medical Education and Chiles Research Institute, Providence Medical Center, Portland, Oregon.

Antimicrobial Agents and Chemotherapy

|March 1, 1991

Summary

Once-daily aminoglycoside dosing is effective and safe, potentially reducing toxicity risk. This dosing strategy leverages the post-antibiotic effect (PAE) for sustained antibacterial efficacy, even below minimum inhibitory concentrations.

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Area of Science:

Pharmacology and Infectious Diseases

Background:

Once-daily administration of aminoglycosides presents an attractive therapeutic option.
Existing animal and clinical data suggest reduced or unchanged toxicity risk with less frequent dosing.
Reduced dosing frequency minimizes drug contact time with host tissues, potentially mitigating toxicity.

Purpose of the Study:

To evaluate the efficacy and safety of once-daily aminoglycoside administration.
To explore the role of the post-antibiotic effect (PAE) in maintaining antibacterial activity.
To assess the implications of this dosing strategy in neutropenic patients.

Main Methods:

Review of animal experiments and clinical trial data.
Analysis of pharmacokinetic and pharmacodynamic principles, including PAE.
Consideration of concurrent beta-lactam therapy in specific patient populations.

Main Results:

Less frequent dosing does not appear to impair antibacterial efficacy, likely due to PAE.
Higher peak serum concentrations may enhance early antibacterial activity within a dosage interval.
In neutropenic patients, the in vivo PAE may be diminished or altered, potentially necessitating combined therapy.

Conclusions:

International trial results are encouraging for once-daily aminoglycoside therapy.
Despite pending US trial data, cautious implementation is warranted due to potential patient benefits.
Infectious disease specialists should begin educating on the adoption of this dosing strategy.

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