Priority Review for Genentech’s flue treatment Baloxavir

Priority Review for Genentech’s flue treatment Baloxavir
Credit: Shutterstock.com/ Joe Besure

US regulators have accepted Genentech’s New Drug Application and granted Priority Review for baloxavir marboxil as a single-dose, oral treatment for acute, uncomplicated influenza in people aged 12 and older.

If approved, baloxavir marboxil would be the first oral, single-dose antiviral and the first medicine with a novel proposed mechanism of action to treat the flu in nearly 20 years.

The Food and Drug Administration is expected to make a decision on approval by December 24, 2018.

“The severity of the recent flu season underscores the need for new options beyond currently available treatments, and if approved, baloxavir marboxil would be the first flu medicine with a novel proposed mechanism of action in nearly 20 years,” said Sandra Horning, Chief Medical Officer and head of Global Product Development.

“Baloxavir marboxil has been shown in clinical trials to decrease the duration of symptoms with one dose, and demonstrated a significant reduction in viral shedding in just one day. We look forward to working with the FDA during the review process.”

Baloxavir marboxil is a first-in-class, single-dose investigational oral medicine with a novel proposed mechanism of action designed to target the flu virus, including oseltamivir-resistant strains and avian strains (H7N9, H5N1).

Unlike other currently available antiviral treatments, baloxavir marboxil is designed to inhibit the cap-dependent endonuclease protein within the flu virus, which is essential for viral replication.

The New Drug Application is based on results from the Phase III CAPSTONE-1 study of a single dose of baloxavir marboxil compared with placebo or oseltamivir 75 mg, twice daily for five days, in otherwise healthy people with the flu.

Additionally, results from a placebo-controlled Phase II study in otherwise healthy people with the flu are included as supporting data in the NDA.