Table 1.

Piperacillin/tazobactam content during storage in FOLFusor LV10 (Baxter) elastomeric devices as determined by stability indicating HPLC assay

Timepoint	90 mg/mL*		25 mg/mL†
	PIP+TAZ, % remaining	95% CI (%)	PIP+TAZ, % remaining	95% CI (%)
Day 0	100.0 (94.1±0.4 mg/mL)	99.6 to 100.4	100 (27.1±0.2 mg/mL)	99.1 to 100.9
Day 7	101.3	100.8 to 101.8	101.5	101.2 to 101.8
Day 10	99.7	99.5 to 99.9	100.3	99.9 to 100.7
Day 13	98.7	98.3 to 99.1	99.7	99.4 to 100.1
Day 13+1	98.0	97.8 to 98.2	100.9	100.3 to 101.5

*90 mg/ml total drug concentration: 80 mg piperacillin/10 mg tazobactam.

†25 mg/ml total drug concentration: 22 mg piperacillin/3 mg tazobactam.

PIP, piperacillin; TAZ, tazobactam.