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Published on: April 26, 2012
Oxaliplatin pharmacokinetics during a four-hour infusion
1Ludwig-Maximilians-University Hospital Grosshadern, Department of Medicine III, München, Germany. wolfgang.kern@med3.med.uni-muenchen.de
Summary
Oxaliplatin demonstrates significant activity in advanced colorectal cancer. This study characterized its pharmacokinetics, revealing low interpatient variability and a triphasic decrease in free platinum levels with a terminal half-life of approximately 27.3 hours.
Area of Science:
- Pharmacology and Oncology
- Drug Metabolism and Pharmacokinetics
Background:
- Oxaliplatin is an effective platinum compound for advanced colorectal carcinomas.
- Adequate pharmacokinetic characterization of oxaliplatin is crucial for optimizing treatment regimens.
Purpose of the Study:
- To extensively analyze the pharmacokinetics of ultrafiltrable (free) and protein-bound platinum from oxaliplatin.
- To evaluate pharmacokinetic parameters in patients with advanced colorectal carcinomas receiving oxaliplatin in combination with 5-fluorouracil.
Main Methods:
- Pharmacokinetic analysis of 13 patients receiving oxaliplatin (130 mg/m2) and 5-fluorouracil (375 mg/m2).
- Measurement of ultrafiltrable and protein-bound platinum levels over time.
- Calculation of key pharmacokinetic parameters including half-life, AUC, clearance, and volume of distribution.
Main Results:
- Low interpatient variability was observed for all analyzed pharmacokinetic parameters.
- Free platinum levels exhibited triphasic decay with a mean terminal half-life of 27.3 ± 10.6 hours.
- Key parameters included AUC (20.17 ± 6.97 μg·h/mL), total clearance (222 ± 65 mL/min), renal clearance (121 ± 56 mL/min), and Vd (349 ± 132 L).
Conclusions:
- Oxaliplatin exhibits predictable pharmacokinetics with low interpatient variability in advanced colorectal cancer patients.
- The characterized pharmacokinetic profile provides a basis for further investigation into optimal dosing strategies.
- Further studies simulating long-term administration and chronomodulated infusion are warranted.
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