- Design
- Prospective observational service evaluation
- Population
- 19 patients (20 consultations), median age 2.7 years, quaternary children's hospital
- Primary outcome
- Turnaround time and changes in cefepime dosing
- Effect
- Median turnaround 27.8 h; 50% resulted in a new dosing strategy
A quaternary children's hospital reported its first year (August 2024 – August 2025) of a model-informed precision dosing (MIPD) service for cefepime. It covered 20 consultations in 19 patients (median age 2.7 years), half of whom were on extracorporeal support such as ECMO or renal replacement therapy.
Recommendations came a median 27.8 hours after the request. Forty per cent confirmed the existing regimen and 50% led to a new strategy — a different dose, interval or infusion duration. In one case cefepime was switched to meropenem over concern for neurotoxicity.
Cefepime is time-dependent: efficacy depends on the time concentrations stay above the MIC, while high exposures risk neurotoxicity, especially in renal impairment. Extracorporeal circuits make both under- and over-exposure likely. The service was feasible, but the turnaround time shows the logistical barriers are real.
- Consider cefepime levels or model-guided dosing in patients on ECMO or renal replacement therapy.
- Use extended or continuous infusion to increase time above MIC in resistant organisms.
- Suspect cefepime neurotoxicity in confusion, myoclonus or seizures, particularly with reduced renal function.
- Adjust cefepime dose for renal function from the start.
Why it matters
It shows that standard beta-lactam dosing often misses target in the sickest patients, and that fixing it is operationally possible.
Don't overread it
A 20-consultation single-centre feasibility report — it does not show improved clinical outcomes.
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