Favipiravir is a broad-spectrum antiviral drug. Its chemical name is 6-fluoro-3-hydroxypyrazine-2-carboxamide. It appears as an off-white to light yellow crystalline powder. As an RNA polymerase inhibitor, it can selectively block viral nucleic acid replication and exert potent inhibitory activity against a variety of RNA viruses.

1. Clinical:Approved for the treatment of novel and severe influenza in Japan; previously used in clinical studies of COVID-19.
2. Scientific Research:As an antiviral tool compound, it is used for in vitro and in vivo studies against various RNA viruses, including influenza, Ebola, and norovirus.