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Director, Clinical Pharmaceutics Research, Division of Pharmacy, The University of Texas, MD Anderson Cancer Center, Houston, TX
Research Scientist, Clinical Pharmaceutics Research, Division of Pharmacy, The University of Texas, MD Anderson Cancer Center
Reprints: Lawrence A Trissel BS, Division of Pharmacy, Box 90, The University of Texas, MD Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030-4009, FAX 713/796-1910
OBJECTIVE: To evaluate the physical and chemical stability of cefepime (as the hydrochloride) 1 g/100 mL and 4 g/100 mL admixed in NaCl 0.9% injection and packaged in AutoDose Infusion System bags.
DESIGN: Triplicate test samples of cefepime hydrochloride in NaCl 0.9% injection were packaged in ethylene vinyl acetate plastic containers, AutoDose bags, designed for use in the AutoDose Infusion System. Samples were stored protected from light and evaluated at appropriate intervals for up to 7 days at room temperature of approximately 23 °C and 30 days under refrigeration at 4 °C. Physical stability was assessed using turbidimetric and particulate measurement, as well as visual inspection. Chemical stability was assessed by HPLC.
RESULTS: All of the admixtures were initially clear and light yellow when viewed in normal fluorescent room light and with a Tyndall beam. Measured turbidity and particulate content were low initially but increased over time, eventually becoming a yellow or orange precipitate. The higher concentration precipitated earlier; refrigeration slowed precipitation for both test concentrations. HPLC analysis found that the 1-g/100 mL concentration maintained adequate stability for 2 days at 23 °C and up to 30 days at 4 °C. The 4-g/100 mL concentration maintained adequate stability for 1 day at room temperature and 7 days under refrigeration; however, unacceptable drug loss and precipitation developed after those time points.
CONCLUSIONS: Cefepime hydrochloride exhibited physical and chemical stability consistent with previous stability studies. The AutoDose Infusion System bags were not found to affect adversely the physical and chemical stability of this drug.
Key Words: AutoDose, cefepime, ethylene vinyl acetate, stability
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