Regeneron’s antibody cocktail granted Emergency Use Authorisation

The FDA has granted Emergency Use Authorisation (EUA) to Regeneron’s antibody cocktail for COVID-19.

The cocktail combines casirivimab and imdevimab administered together is the first combination therapy to receive this designation.

Casirivimab and imdevimab administered together are authorized for the treatment of mild to moderate COVID-19 in adults, as well as in paediatric patients at least 12 years of age who have received positive results of direct SARS-CoV-2 viral testing and are at high risk for progressing to severe COVID-19 and/or hospitalization.

The clinical evidence from Regeneron’s outpatient trial suggests that monoclonal antibodies such as casirivimab and imdevimab have the greatest benefit when given early after diagnosis and in patients who have not yet mounted their own immune response or who have high viral load.

The criteria for ‘high-risk’ patients are described in the Fact Sheet for Health Care Providers. Casirivimab and imdevimab are not authorized for use in patients who are hospitalized or require oxygen therapy due to COVID-19, or for people currently using chronic oxygen therapy because of an underlying comorbidity who require an increase in baseline oxygen flow rate due to COVID-19.

“This FDA Emergency Use Authorization is an important step in the fight against COVID-19, as high-risk patients in the United States will have access to a promising therapy early in the course of their infection,” said Leonard S. Schleifer, President and CEO of Regeneron.

“The science and technology investments Regeneron has made over three decades positioned us to move rapidly to invent, study and maximize production of our antibody cocktail.

“Even with these incredible efforts, demand may exceed supply initially, making it even more critical that federal and state governments ensure the casirivimab and imdevimab antibody cocktail is distributed fairly and equitably to the patients most in need.

“In the first quarter of 2021, we expect to increase available global supply as we continue our collaboration with Roche.”

Under the EUA, the recommended dose is 1,200 mg of casirivimab and 1,200 mg of imdevimab (2,400 mg total) administered as a single intravenous infusion. The authorisation is based on positive Phase 2 data announced in September and October from the first 799 adults in an ongoing randomized, double-blind, placebo-controlled trial of non-hospitalized patients with COVID-19.

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