Sandoz and Regeneron settle aflibercept dispute, paving way for US debut

9 September 2025

Sandoz (SIX: SDZ) has resolved all US patent litigation with Regeneron (Nasdaq: REGN) over its aflibercept biosimilar, Enzeevu (aflibercept). Under the deal, Sandoz can enter the US market in the fourth quarter of 2026, or earlier under certain conditions, removing a major hurdle to its ophthalmology push.

The settlement ends a case brought in 2024 under the Biologics Price Competition and Innovation Act. Enzeevu, approved by the US regulator in August 2024, matches the reference product’s dosage form, route, and presentation. The agency has also provisionally deemed Enzeevu interchangeable, with timing subject to existing first-interchangeable exclusivity.

Enzeevu is indicated to improve and maintain vision in neovascular age-related macular degeneration, a common cause of sight loss in people over 50. Aflibercept works by blocking VEGF-A and PlGF, proteins that drive abnormal blood vessel growth in the eye — a straightforward mechanism that helps keep the narrative easy to follow.

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