Meropenem Dosing for Brain Abscess in End-Stage Renal Failure

Neurotoxicity Monitoring and Risk Factors

• The American College of Critical Care Medicine suggests that meropenem has a relatively favorable neurotoxicity profile compared to other beta-lactams, with a pro-convulsive activity of only 16, making it safer than cefepime or imipenem in ESRF 1
• Neurotoxicity risk increases when meropenem trough concentrations exceed 64 mg/L, and renal failure is the main risk factor for beta-lactam neurotoxicity due to drug accumulation 1
• When the free minimum concentration normalized to MIC (fCmin/MIC ratio) exceeds 8, significant neurological deterioration occurs in approximately two-thirds of ICU patients treated with meropenem 1

Practical Administration and Monitoring

• The Critical Care society recommends monitoring trough levels if available, keeping below 64 mg/L to minimize neurotoxicity risk 1
• The benefit-risk balance decreases as free minimum concentrations exceed eight times the MIC, requiring careful monitoring in ESRF 1