Changes in Biologic Drug Revenues After Administrative Patent Challenges

Raymakers AJN, Van de Wiele VL, Kesselheim AS, Tu SS - Health Affairs

  • Innovation Incentives and Competition

Summary:

Since 2012, 70-74% of biologic patents challenged via inter partes review (IPR) by biosimilar or alternative product manufacturers were invalidated, and these challenges were associated with reduced revenue for reference biologics. Policymakers should not restrict access to IPR, as it is a valuable pathway to facilitate biosimilar entry.

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The Impact of Semantics in Medicines Regulation

Costa E, Kesselheim AS - Journal of Law, Medicine, & Ethics

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Delisted Patents on Pharmaceuticals, 1998-2024

Kirby-Rivera L, Feldman WB, Kim M, Kosmopoulou G, Kesselheim AS, Tu SS - Journal of Law, Medicine, & Ethics

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Delays in Access to Generic Semaglutide Point to Key Missing Pieces in Canada’s Drug Approval System

Eisenkraft Klein D, Kesselheim AS - Health Policy

  • Innovation Incentives and Competition
  • Regulation and Clinical Evidence
Canada approved its first generic semaglutide nearly four months after market exclusivity expired, with delays arising from the absence of clear standards for demonstrating equivalence between fully synthetic generics and the brand-name product. Regulators should publish equivalence standards so manufacturers can build the required evidence into their initial submissions, helping lower-cost alternatives reach patients sooner.
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