Can Bepirovirsen Hepatitis B Treatment Offer a Functional Cure?
Source PublicationNew England Journal of Medicine
Primary AuthorsHou, Lim, Buti et al.

Imagine your immune system is a security guard trying to catch an intruder who has copied the master key to your home. The intruder keeps printing copies of these keys, completely overwhelming your defences. A new drug called bepirovirsen acts like a molecular shredder, destroying the genetic blueprints before those viral keys can ever be made.
This approach could change how we treat chronic infections. In new clinical trials, bepirovirsen hepatitis B therapy was evaluated in adults already taking standard antiviral medication to see if they could safely stop daily treatment.
Testing Bepirovirsen Hepatitis B Efficacy
In two phase 3 trials, researchers evaluated weekly injections of either the drug or a placebo for 24 weeks. Patients stopped all medications at week 48. By week 72, the trials measured a clear difference:
- Approximately 20% of patients treated with the drug achieved a functional cure, meaning the virus remained undetectable.
- No patients in the placebo group achieved this drug-free state.
- Adverse events were more common with the active drug, including temporary liver enzyme spikes in 6% of participants.
How This Might Change Medicine
These trials suggest that a finite course of therapy could help some patients control the virus without lifelong medication. While the drug carries a higher risk of side effects, the data suggest a realistic path toward remission. Future research may help doctors identify which patients are most likely to benefit from this genetic defence system.