FDA Approval Eludes Amgen for Biosimilar Trastuzumab

Amgen will have to wait a bit longer to market its biosimilar version of trastuzumab . On Friday, June 1, the Food and Drug Administration (FDA) rejected Amgen’s 351(k) application for its Herceptin® biosimilar. biosimilar trastuzumab approvalIn a brief press release, Amgen announced receiving the complete response letter for ABP 980. In the announcement, it also said that the delay in its biosimilar trastuzumab approval should not “impact our US launch plan.” This may signal that even if it received approval, it would not market the biosimilar trastuzumab immediately.

The timing of the FDA announcement on the biosimilar trastuzumab approval contrasted with the near-simultaneous marketing authorization of this same trastuzumab biosimilar by the European Medicines Agency. The biologic will be marketed in Europe under the trade name Kanjinti™.

Mylan/Biocon’s Ogivri™ remains the only biosimilar trastuzumab approved by the FDA. It is not yet marketed, however. Separate trastuzumab biosimilars by Teva/Celltrion and Pfizer have been stalled by the FDA. Samsung Bioepis’s entry is due for an FDA approval decision in the fourth quarter of 2018.

In related biosimilar news… in September 2017, Mylan filed a 505(b)2 application for its insulin glargine agent. The manufacturing duo of Mylan and Biocon received a rejection from the FDA on June 1. The complete response letter specified issues raised by a change in manufacturing site (from one in India to a new facility in Malaysia). As reported by the Economic Times, the complete response letter was expected by Mylan and Biocon. They told the Economic Times, “Together, Mylan and Biocon are already executing on all required activities we had agreed upon with the FDA, and they are progressing according to plan,” the statement said.

Although insulins are not currently approved through the 351(k) biosimilar pathway, they are among the “transitional agents,” which by 2020 will be considered biosimilars by the FDA.

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