Amikacin Dosing Considerations in Pediatric Patients

Fundamental Dosing Principles

The Centers for Disease Control and Prevention recommends maintaining adequate peak concentrations while avoiding toxicity through extended intervals in pediatric patients with renal impairment 1
The critical concept for aminoglycoside dosing in renal dysfunction is to preserve the concentration-dependent bactericidal effect by maintaining adequate peak concentrations while avoiding toxicity through extended intervals 1
Do not reduce the mg/kg dose - smaller doses reduce efficacy of this concentration-dependent antibiotic 1
Instead, extend the interval between doses to 2-3 times weekly (every 2-3 days) while maintaining 12-15 mg/kg per dose 1

Administer amikacin after dialysis to facilitate directly observed therapy and avoid premature drug removal 1, 3
Use the interval extension method with doses given 2-3 times weekly 1

The Centers for Disease Control and Prevention recommends therapeutic drug monitoring to ensure adequate but not excessive levels 1
Target peak: 30-40 mg/L (measured 30-90 minutes after infusion) 4, 2
Target trough: <5 mg/L (measured just before next dose) 4, 3, 2
Never reduce the mg/kg dose in renal impairment - this compromises the concentration-dependent bactericidal effect and risks treatment failure 1, 2
Amikacin has increased risk of both ototoxicity and nephrotoxicity in renal impairment, making dose adjustments and monitoring essential 1

Nephrotoxicity occurs less commonly with streptomycin than with amikacin, but amikacin remains necessary for ESBL-producing organisms and drug-resistant infections 1
The risk of ototoxicity increases with cumulative doses above 100-120 grams 1
Ensure adequate hydration to minimize nephrotoxicity risk 2