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GSK hepatitis B drug secures FDA priority review

Tue 28 April 2026 09:15 | A A A

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(Sharecast News) - Pharmaceutical giant GSK said on Tuesday that the US Food and Drug Administration had accepted its new drug application for bepirovirsen for priority review, with the drug being assessed as a potential treatment for adults with chronic hepatitis B.

GSK said the therapy had also been granted breakthrough therapy designation, which follows its receipt of fasttrack status in February 2024, intended to speed reviews for treatments addressing serious unmet need.

The FTSE 100-listed firm stated the submission and breakthrough designation were backed by positive Phase III BWell 1 and BWell 2 results, where bepirovirsen delivered "statistically significant and clinically meaningful" functionalcure rates and showed an "acceptable safety profile".

GSK noted that chronic hepatitis B affects more than 250m people worldwide and around 1.7m in the US, with current standard therapies often requiring lifelong treatment and delivering functionalcure rates of roughly 1%.

As of 1020 BST, GSK shares were down 0.74% at 2,001p.

Reporting by Iain Gilbert at Sharecast.com

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