Many types of biological products are used therapeutically and for supportive care for patients with cancer. Biologics are large, complex molecules that are produced by biotechnology in a living system (for example, a microorganism, plant, or animal cell). The U.S. Food and Drug Administration (FDA) regulates and approves biological products, which include therapeutic proteins, monoclonal antibodies, and vaccines.
Biosimilars are biological products that are highly similar to and have no clinically meaningful differences from an already-approved FDA biological product (called the “reference product”). For more information, access the FDA Biological Product Definitions.
In Europe, biosimilars have been in use for more than a decade and have been shown to reduce costs and increase patient access to these products.
In the U.S., Congress enacted legislation to create an abbreviated regulatory process for biosimilars, The Biologics Price Competition and Innovation Act of 2009. With the introduction of biosimilars to the U.S. market, the hope is to produce long-term savings that can be passed on to the healthcare system and patients.
In 2015, the first biosimilar approved in the U.S. was filgrastim-sndz (Zarxio), a biosimilar to filgrastim (Neupogen), a supportive care drug used to prevent infection during chemotherapy.
In July 2019, the first two therapeutic anticancer biosimilars launched in the U.S. market. As of March 2021, the FDA has approved 29 biosimilars (not all in oncology). Biosimilars are regularly being approved by the FDA. For a current list of all approved biosimilars, consult the FDA’s Purple Book.
Although biosimilars offer potential cost savings to the U.S. healthcare system, there have been challenges integrating biosimilars into practice due to a variety of factors including complex workflows, payer requirements, provider acceptance, and market expectations. However, there are strategies the multidisciplinary cancer care team can employ—from working with payers to developing policies and procedures to incorporate biosimilars into the oncology workflow.