Optimization of meropenem dosage in the critically ill population based on renal function

Area of Science:

• Pharmacokinetics and Pharmacodynamics
• Critical Care Medicine
• Infectious Diseases

Background:

• Meropenem is a critical antibiotic for severe infections.
• Dosing requires adjustment based on patient-specific factors, especially renal function.
• Optimizing meropenem therapy in critically ill patients is essential for effective treatment.

Purpose of the Study:

• To develop a population pharmacokinetic model for meropenem in critically ill patients.
• To optimize meropenem dosing regimens considering creatinine clearance (CrCl).

Main Methods:

• Population pharmacokinetic analysis using CrCl and adjusted body weight.
• Model validation with independent patient samples.
• Monte Carlo simulation for optimal dosing strategies across CrCl ranges.

Main Results:

• A pharmacokinetic model incorporating CrCl was developed (K₁₀= 0.3922 + 0.0025 × CrCl).
• Prolonged meropenem infusions (3 hours) demonstrated superior target attainment compared to 0.5-hour infusions.
• Optimal dosing regimens were identified for different CrCl levels to achieve desired therapeutic targets.

Conclusions:

• The developed pharmacokinetic model accurately predicts meropenem concentrations in critically ill patients.
• Prolonged meropenem infusions enhance therapeutic target attainment across diverse renal function statuses.
• This model aids in personalized meropenem dosing for improved patient outcomes.