Genentech Flu Drug Approved by FDA
FDA has approved Genentech’s Xofluza (baloxavir marboxil) for treating acute, uncomplicated influenza in people 12 years of age and older. The first-in-class drug works by inhibiting polymerase acidic endonuclease, an enzyme essential for viral replication, the company says. “Xofluza has demonstrated efficacy against a wide range of influenza viruses, including oseltamivir-resistant strains and avian strains (H7N9, H5N1) in non-clinical studies,” it says.
Approval was based on data from the Phase 3 CAPSTONE-1 study of a single dose of Xofluza compared with placebo or oseltamivir 75 mg, twice daily for five days, in otherwise healthy people with the flu, as well as results from a placebo-controlled Phase 2 study in healthy people with the flu. “Xofluza significantly reduced the duration of flu symptoms compared to placebo, and demonstrated similar efficacy compared to oseltamivir,” Genentech says. “In clinical trials, Xofluza was safe and well-tolerated with a side effect profile similar to placebo.”