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  • Generic company challenges flu drug Xofluza¡¯s patent
  • by Kim, Jin-Gu | translator Alice Kang | Nov 14, 2025 06:12am
Kwangdong Pharmaceutical files patent circumvention trial against Xofluza¡¯s formulation patent
First patent challenge for Xofluza... Will subsequent trials follow?
Roche's influenza treatment Xofluza (baloxavir marboxil) has become a generic company¡¯s target for patent challenge. This marks the first patent challenge against Xofluza. Industry observers predict related patent challenges will continue in the near future.

According to industry sources on the 13th, Kwangdong Pharmaceutical recently filed a passive scope of rights confirmation trial against Shionogi & Co. regarding Xofluza¡¯s formulation patent. Shionogi is the original developer of Xofluza, and Roche Korea is currently in charge of its domestic sales.

A total of 4 patents related to Xofluza are currently registered. These include two substance patents expiring in 2031 and 2036, respectively, and two formulat
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