Answer
Piperacillin kills susceptible bacteria, while tazobactam blocks many enzymes that can destroy penicillin antibacterials.
Sources for this answer
- Piperacillin/Tazobactam 2 g / 0.25 g powder for solution for infusion — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.