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Updated: Apr 27, 2026

Multiplex Therapeutic Drug Monitoring by Isotope-dilution HPLC-MS/MS of Antibiotics in Critical Illnesses
Published on: August 30, 2018
Optimal meropenem concentrations to treat multidrug-resistant Pseudomonas aeruginosa septic shock
Fabio Silvio Taccone1, Frédéric Cotton, Sandrine Roisin
1Department of Intensive Care, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium. ftaccone@ulb.ac.be
Abstract:
A patient with septic shock due to extensively drug resistant (XDR) Pseudomonas aeruginosa was cured by optimizing the meropenem (MEM) regimen to obtain at least 40% of the time between two administrations in which drug levels were four times higher than the MIC of the pathogen. As the standard drug dose did not achieve these optimal concentrations, the MEM regimen was progressively increased up to 12 g/day (3 g every 6 h in a 3-h extended infusion), which eventually resulted in sepsis resolution. High MEM dosage may represent a valuable therapeutic option for infection due to multidrug-resistant (MDR) strains, and drug monitoring would allow rapid regimen adjustment in clinical practice.
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