Related Experiment Video

Updated: Aug 6, 2025

Multiplex Therapeutic Drug Monitoring by Isotope-dilution HPLC-MS/MS of Antibiotics in Critical Illnesses
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Piperacillin/Tazobactam in critically ill morbidly obese patients: A case series: The first One-Centre experience

M Mieresova1,2, K Balazova1, J Kubele3

  • 1Department of Clinical Pharmacy Na Homolce Hospital Prague Czech Republic.

Clinical Case Reports
|March 15, 2023
PubMed

Insights

Piperacillin/tazobactam shows extreme pharmacokinetic variability in critically ill obese patients. Routine plasma monitoring is crucial for effective and safe antibiotic treatment.

Area of Science:

  • Pharmacology
  • Critical Care Medicine
  • Antibiotic Therapy

Background:

  • Piperacillin/tazobactam (PIP/TAZO) is a critical antibiotic for severe infections.
  • Morbidly obese patients present unique pharmacokinetic challenges.
  • Optimizing antibiotic dosing in this population is essential for patient outcomes.

Observation:

  • Critically ill morbidly obese patients exhibit significant interindividual variability in PIP/TAZO pharmacokinetics.
  • Standard dosing may not achieve therapeutic concentrations in all patients.
  • Plasma concentration monitoring is not routinely performed.

Findings:

  • PIP/TAZO pharmacokinetics are highly unpredictable in this patient group.
  • Observed variability impacts the achievement of target drug exposure.
  • This variability necessitates individualized dosing strategies.

Implications:

  • Routine therapeutic drug monitoring of PIP/TAZO is recommended for critically ill morbidly obese patients.
  • Individualized dosing can enhance antibiotic efficacy and minimize toxicity.
  • Further research into optimized dosing regimens for this population is warranted.
Keywords:
critical illnessmorbid obesitypiperacillin/tazobactam (PIP/TAZO)therapeutic drug monitoring (TDM)

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