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The chemical stability of pemetrexed solutions diluted in 0.9% sodium chloride (0.9% NaCl) and 5% dextrose (D5%) in PVC infusion bags at 2–8°C was determined by High Performance Liquid Chromatography (HPLC) for 1 month by Zhang and Trissel1 and Rondelot et al.2 However, subvisual examination shows an increase in turbidimetry and in the number of microparticulates after storage at 2–8°C. The hypothesis of an interaction with PVC was advanced and the use of an inline filter was advised.1 The discrepancy between the nephelometric evaluation and HPLC analysis could be due to the requirement to dilute the samples with the HPLC method. Dilution before analysis increases the solubility, a microprecipitate can be dissolved, …
Contributors ED’H and JV carried out the experiment and analysed the data. ED’H wrote the manuscript with support from JV, SM and PL. BD supervised the project. All authors provided critical feedback.
Competing interests None declared.
Patient consent Not required.
Provenance and peer review Not commissioned; externally peer reviewed.