GSK’s bepirovirsen, branded Hibsago, has received its first global approval in Japan for adults with chronic hepatitis B. Japanese regulators describe it as the country’s first and only approved treatment offering a “functional cure”—sustained control without ongoing antiviral therapy. The approval was supported by the Phase III B-Well 1 and B-Well 2 trials. Among patients with lower hepatitis B surface-antigen levels, about 19% achieved a functional cure. GSK says the drug could offer a finite, roughly six-month treatment course rather than lifelong daily pills, though its precise use depends on the approved patient criteria. Bepirovirsen is an antisense oligonucleotide designed to reduce viral replication and hepatitis B surface-antigen levels while enhancing the immune response. GSK has also submitted it for review in Europe, and U.S. review has priority status; it is not yet approved in those regions. For Trodelvy, the European Commission has granted another expanded authoriz...
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