This study aims to evaluate the feasibility of an open randomized controlled study which would assess the proportion patients with obesity who will have a favorable pharmacodynamic parameter (i.e. fT\> 100% MIC) after 24 hours of piperacillin-tazobactam administered as a prolonged intermittent infusion compared to a standard infusion.
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Rate of adherence to the sampling protocol
Timeframe: At 24 hours of treatment of piperacillin-tazobactam after randomization
Recruitment rate
Timeframe: At the randomization
Achievement of a prespecified number of patients recruited per month
Timeframe: At the randomization
Proportion of eligible patients relative to the total population who received a piperacillin-tazobactam for the study period
Timeframe: From the screening period to the enrollment, assessed up to 24 hours after the start of a piperacillin-tazobactam prescription