Abstract
Biosimilar agents are biologic products that have no clinically meaningful differences in terms of quality, efficacy, safety and immunogenicity compared to an already approved reference biological product, with the potential to reduce the costs of biologics. Considering the increasing numbers of oncology biosimilars, it is important to calculate the economic impact of biosimilars in oncology and hemathology, considering trastuzumab and rituximab as examples, with their greatest budgetary impact in Oncology and Hematology Units, respectively. The present analysis was conducted to assess the pharmacological costs of trastuzumab and rituximab originator versus the corresponding approved biosimilars. Pivotal phase III randomized controlled trials (RCTs) were considered for the approved indications in neoadiuvant breast cancer (BC) and in first-line treatment for advanced follicular lymphoma. Pharmacological costs necessary to get the benefit in the cancer outcomes: i) time to treatment failure (TTF) and ii) pathological complete response (pCR) in biosimilars and originators were calculated. The costs of drugs are at the Pharmacy of our Hospital and are expressed in euros (€). Our analysis evaluated 5 phase III RCTs, including 2,362 patients. The economic advantage of biosimilars versus (vs.) originator is 274 € (rituximab) and from 3,283 € to 6,310 € (trastuzumab) per month for TTF (about 40% less than the originator). Combining pharmacological costs of drugs with the measure of efficacy represented by TTF and pCR, biosimilars of rituximab and trastuzumab are cost-effective treatments for advanced follicular lymphoma and breast cancer.
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