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Study Objectives: To evaluate extended in-use stability of bevacizumab biosimilar, ABP 215, after dilution into intravenous bags, extended storage, and simulated infusion to enable advanced preparation and storage. Methods: Two lots of ABP 215 were diluted to high- (16.5 mg/mL) and low- (1.4 mg/mL) dose concentrations in two types of intravenous bag under ambient light conditions. Dosed intravenous bags were stored at 2°C–8°C for 35 days, followed by 30°C for 2 days, and each bag was infused on Day 37. Analysis of purity and physicochemical stability was performed using size-exclusion high-performance liquid chromatography (SE-HPLC), cation-exchange high-performance liquid chromatography (CEX-HPLC), reduced capillary electrophoresis-sodium dodecyl sulphate (rCE-SDS), subvisible particle detection assays, visual inspection, and by measuring protein concentration and potency. Results: No meaningful changes were seen in ABP 215 purity when analysed by SE-HPLC, CEX-HPLC and rCE-SDS following dilution, storage and infusion of two lots, bags, and doses. Protein concentration remained consistent throughout the study for all samples and no significant loss in potency was detected. No potentially proteinaceous particles or increases in subvisible particles were observed. Discussion: This study investigated the in-use stability of ABP 215 following dilution, extended storage, and infusion, that represent worst-case handling conditions. ABP 215 exhibited consistent product quality and activity, with no significant degradation observed under the conditions tested. Conclusion: ABP 215 retains physicochemical stability after dilution over the recommended dosing concentrations, extended storage, and simulated infusion. This supports the advance preparation and storage of ABP 215 in intravenous bags for infusion.

Physicochemical stability of the bevacizumab biosimilar, ABP 215, after preparation and storage in intravenous bags