The first 351(k) application for a vedolizumab (Entyvio) biosimilar has been submitted by Alvotech. If approved, the biosimilar would be marketed by Teva. Alvotech also resubmitted biosimilar applications for golimumab and aflibercept.
On June 8, Alvotech announced that the FDA has accepted its biologic licensing application for AVT16, a biosimilar candidate for the reference drug Entyvio. This marks the first FDA 351(k) drug application for a vedolizumab biosimilar.

In its press release, Joseph McClellan, Chief Operating Officer of Alvotech, stated, “FDA acceptance of the BLA for AVT16 is another important step in advancing our mission to increase access to biologic medicines for patients worldwide. Our proposed interchangeable biosimilar to Entyvio builds on our experience in immunology and reflects the strength of our fully integrated development and manufacturing platform.”
Vedolizumab, an integrin-receptor antagonist, is currently approved to treat adults with moderate-to-severe ulcerative colitis and Crohn’s disease. The reference product is available in both intravenous infusion and subcutaneous injections.
Takeda’s US Entyvio net revenues were over $4 billion in 2024, but the biologic has been targeted for Medicare maximum fair price negotiation. The negotiated price will be implemented on January 1, 2028, unless biosimilar launch is imminent. The original drug patent is set to expire in 2026.
Intravenous Infusion vs. Subcutaneous Injection
AVT16 would be available only as an intravenous infusion. Alvotech’s biologic licensing application does not cover the subcutaneous injectable. A separate investigational product, AVT80, promises a biosimilar version of the prefilled syringe and autoinjector administration. Alvotech noted that the European Medicines Agency has received a marketing application for both AVT16 and AVT80. It is not clear whether Alvotech and its marketing partner Teva, intends to market these products under separate brand names if approved. The patent on the subcutaneous formulation may not expire until the 2030s, according to some sources, which may play into Alvotech’s decision to separate the FDA applications.
In Other Alvotech Biosimilar News
In November 2025, Alvotech received complete response letters from the FDA on two products—its biosimilar versions of golimumab and aflibercept. On June 4, 2026, the biosimilar manufacturer revealed that it had resubmitted its 351(k) applications to the FDA for both products (AVT05 for golimumab and AVT06 for aflibercept). Alvotech noted that it expects an FDA decision within 6 months. The complete response letters cited production facility issues, and not data or clinical quality questions. The latest FDA surveillance inspection of the Reykjavik production facility was completed by May 11, according to the company.
This article was written by our Director of Content, Stanton Mehr. Stan has been writing commentary and reporting news about the biosimilar industry since the submission of the first biosimilar 351(k) application to the FDA 13 years ago. Since that time, BR&R has been tracking the US biosimilar marketplace, with the industry’s original, comprehensive and updated biosimilar approval database.






Humira savings, the NHS does not exclude using the originator product Humira. It has signed contracts (with large price cuts) with Abbvie, as well as with biosimilar manufacturers Amgen, Biogen, Mylan and its partner Fujifilm Kyowa Kirin, and Sandoz.
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