First Aflibercept Biosimilars Approved in US


The FDA approved the first 2 biosimilars referencing aflibercept (Eylea). However, patent litigation has left it unclear when the biosimilars will come to market.

This article originally appeared on The Center for Biosimilars® website.

Close of up of an older woman's eye | Image credit: Syda Productions -

Despite the approval of 2 aflibercept (Eylea) biosimilars, ongoing litigation has led to uncertainty around when they might launch.

Image credit: Syda Productions -

The FDA announced that it approved the first 2 biosimilars referencing Eylea (aflibercept) for the treatment of ophthalmic conditions, including neovascular age-related macular degeneration (AMD), macular edema, and diabetic retinopathy.

Biocon Biologics's Yesafili (aflibercept-jbvf) and Biogen's Opuviz (aflibercept-yszy) are vascular endothelial growth factor (VEGF) inhibitors that are administered intravitreally as a 2 mg (0.05 mL of 40 mg/mL) injectable solution for patients. Clinical data show that the side effects and adverse events associated with the biosimilars are similar to the reference product.

When treating eye conditions, anti-VEGF medicines stop the abnormal blood vessels leaking, growing and then bleeding under the retina, which can cause intense pain and vision loss for patients.

Both products were also approved with interchangeability desigations, meaning that upon launch Opuviz and Yesafili will be able to be substituted for the reference product at the pharmacy level without patients having to wait for their physicians to sign off on the switch first. The label is intended to reduce wait times for patients to receive their medications, mitigate struggles with drug shortages and supply chain issues, and makes obtaining biologics more convenient.

Yesafili was the first aflibercept biosimilar to be approved in the European Union. The European Commission granted the product marketing authorization in September 2023. It was also approved in the United Kingdom in November 2023.

When Opuviz launches, it will be marketed by Samsung Bioepis in the United States as part of a 2019 commercialization agreement. The partnership also includes SB11 (Byooviz), a ranibizumab (Lucentis) biosimilar.

There are currently 2 ranibizumab biosimilars on the market. Byooviz was the first approved in September 2021 and Cimerli was approved in August 2022. Cardinal Health has noted that significant provider hesitation may result in slow adoption of biosimilars in the ophthalmology space. Nearly a third (31%) of ophthalmologists in a survey said discounted price of the biosimilar had no impact on their prescribing habits and 11% actually said it made them less likely to prescribe the biosimilar. In a February 2023, only 33% of ophthalmologists said they were very familiar with biosimilars, despite having 2 on the market.

Untreated AMD is the leading cause of irreversible blindness or vision loss in people over 60 years of age, according to Genentech, the maker of Lucentis—another anti-VEGF medication. Neovascular AMD, also known as wet AMD, accounts for 10% of AMD cases but results in 90% of legal blindness as a result of AMD.

According to Regeneron, the maker of Eylea, US net sales for original Eylea and high-dose Eylea (Eylea HD) $5.89 billion in 2023, including $166 million from Eylea HD following its August 2023 FDA approval.

However, the time frame of when these products will come to the US market remains up in the air, as Regeneron, the maker of Eylea, is engaging with several biosimilar manufacturers in patent litigation cases. In December 2023, Regeneron sued Samsung Bioepis over the development of Opuviz. Regeneron is also in legal disputes with Celltrion in the US, and received a settlement agreement from Biocon Biologics regarding its planned Canadian launch of Yesafili.

According to data from Cardinal Health, at least 8 aflibercept biosimilars are expected to enter the market in 2024, but similar to the adalimumab and ustekinumab spaces, patent lawsuits will likely result in settlements delaying most—if not all—aflibercept biosimilar launches.

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