Efficacy, safety of biosimilar filgrastim similar to that of filgrastim in daily practice

the ONA take:

The clinical effectiveness and safety of biosimilar filgrastim (Zarxio) in daily clinical practice are similar to that of the originator filgrastim for the prevention of chemotherapy-induced (febrile) neutropenia, according to a new study published online ahead of print in the journal Supportive Care in Cancer.

For the international, prospective, observational, open-label MONITOR-GCSF study, researchers enrolled 1,447 patients with cancer treated with myelosuppressive chemotherapy and receiving prophylaxis with biosimilar filgrastim. Of those, 72.3% received primary prophylaxis and 53.2% initiated prophylaxis between 24 and 72 hours after chemotherapy.

Results showed that 13.2% and 5.9% of patients experienced grade 4 chemotherapy-induced neutropenia and febrile neutropenia, respectively.

Researchers found that 6.1% of patients were hospitalized for (febrile) neutropenia. In regard to safety, 24.7% of patients reported any grade bone pain and 76 patients experienced a total of 148 adverse drug events, of which 4 were serious.

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Effectiveness and safety of biosimilar filgrastim (Zarxio) in daily clinical practice are similar to that of the originator filgrastim.
The purpose of this study is to examine the real-world treatment patterns and outcomes of chemotherapy-induced (febrile) neutropenia (chemotherapy-induced (CIN)/febrile neutropenia (FN)) prophylaxis with biosimilar filgrastim (Zarzio®).
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