Caspofungin infusion solutions (50 mg/100 mL): chemical stability and antifungal activity against Candida spp.
Background: Ready to use caspofungin infusion bags are centrally prepared in the Hospital Pharmacy, University Hospital of Heidelberg, for economic reasons and possibly occurring problems with drug shortages. The aim of this study was a quality control of the in-house preparation of caspofungin infusion bags and the preparation process. Caspofungin concentration with regard to chemical stability and antifungal activity of caspofungin preparations were defined as quality parameters. Methods: Three caspofungin infusion bags (50 mg in 100 mL 0.9% sodium chloride) were examined every seven days for a total of four weeks. Chemical stability of caspofungin solutions was analyzed using a validated high performance liquid chromatography (HPLC) method. Antifungal activity was assessed by microdilution tests according to the EUCAST protocol. Additionally, concentration and sterility were determined in returned caspofungin infusion bags. Results: The amount of caspofungin in the infusion solutions still exceeded 90% after four weeks (2-8 °C). Antifungal activity was consistent over 28 days with a MIC ≤2 mg/L for different Candida spp. In returned infusion bags, caspofungin concentration was found to be ≥90% in 12 out of 13 bags and sterility was given in all preparations. Conclusion: These results show that chemical stability of caspofungin infusion solutions (50 mg/100 mL) can be guaranteed for four weeks at 2-8 °C and are confirmed by corresponding results regarding sterility and antifungal activity.
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Document Type: Research Article
Publication date: 01 April 2017
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