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Parameters Influencing the pharmacokinetics/pharmacodynamics of piperacillin/tazobactam in Patients With Febrile Neutropenia and Haematological Malignancy: A Prospective Study

Parameters Influencing the pharmacokinetics/pharmacodynamics of piperacillin/tazobactam in Patients With Febrile Neutropenia and Haematological Malignancy: A Prospective Study

Nicolas Benech, Oana Dumitrescu, Anne Conrad, Marie Balsat, Etienne Paubelle, Sophie Ducastelle-Lepretre, Hélène Labussière-Wallet, Gilles Salles, Sabine Cohen, Sylvain Goutelle, Florence Ader, Lyon HEMINF Study Group

J Antimicrob Chemother. 2019 Sep 1;74(9):2676-2680.

PMID: 31219562

Abstract:

Objectives:
To assess population pharmacokinetics (PK) and pharmacodynamics (PD) of both piperacillin and tazobactam in neutropenia patients and examine dosage requirements related to the MIC distribution for Gram-negative bacteria involved in bloodstream infections (BSIs).
Methods:
We conducted a prospective study including adult haematological malignancy patients with febrile neutropenia receiving piperacillin/tazobactam as short (30 min) or prolonged (4 h) intravenous infusions. Concentration data were analysed using a population approach. Dosing simulations with the final model investigated factors influencing the PK/PD of piperacillin/tazobactam quantified by fT>MIC or PTA for piperacillin and tazobactam, respectively. In parallel, the local MIC distribution of β-lactams was documented for Gram-negative bacteria involved in BSIs.
Results:
Over 10 months, 31 patients were enrolled, with 11 (35.5%) short and 20 (64.5%) prolonged infusion regimens. A one-compartment model adequately described the data for both drugs. Prolonged infusion, increased serum alkaline phosphatase (ALP) values and renal function impairment were associated with increased piperacillin fT>MIC. For patients with normal or augmented renal CL, dosing regimens q8h or q6h with 30 min of infusion were insufficient to achieve acceptable PTA for piperacillin/tazobactam at the median MIC value of 8 mg/L. Prolonged infusion of large doses was associated with the best PTA for both piperacillin and tazobactam.
Conclusions:
In a population of haematological malignancy patients with neutropenia, renal function and ALP influenced the PK of piperacillin/tazobactam. Prolonged intravenous infusion would optimize the PK of piperacillin/tazobactam, especially in the case of augmented renal CL and/or low-range bacterial susceptibility.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP66258762	Piperacillin		66258-76-2	Price

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