No Safety Issues in Biosimilar Switches: Study
FDA researchers who conducted a review and meta-analysis of safety outcomes when switching between biosimilars and reference biologics report no difference in the safety profiles or immunogenicity rates in patients who were switched and those who remained on a reference biologic or biosimilar. “The results demonstrate that the incidence and nature of safety events observed in patients who were switched to or from a biosimilar product and its corresponding reference biologic once or multiple times are not statistically different from those in patients who were not switched,” the researchers conclude.
The study was published in the open-access PLOS ONE journal.
The researchers say that under the law, the risk of switching between a reference product and an interchangeable product must not be greater than the risk of using the reference product without switching. They say a switching study may be performed to address that switching standard. Such studies often contain at least two alternating exposures of the proposed interchangeable product and the reference biologic, resulting in at least three switches, they write.
“The findings here support reducing the regulatory burden of switching studies as the default approach for addressing the switching standard for the interchangeable designation,” the report says. “This work also supports reassessing the need for switches included in clinical studies for candidate biosimilars as an approved biosimilar will be analytically highly similar to its reference product. As familiarity with and understanding of the rigor of the analytical comparisons used to support biosimilar approvals increases, the amount and type of clinical data routinely performed as part of biosimilar development may be reduced, which in turn would reduce the time and cost of development.”