Regeneron Pharmaceuticals Inc. announced the U.S. FDA updated the Emergency Use Authorization (EUA) for REGEN-COV?, lowering the dose to 1,200 mg (600 mg casirivimab and 600 mg imdevimab), which is half the dose originally authorized. As part of the updated EUA, REGEN-COV should be administered by intravenous (IV) infusion; subcutaneous (SC) injections are an alternative when IV infusion is not feasible and would lead to a delay in treatment.

"Despite increased use of vaccines, thousands of patients are still becoming infected in the U.S. every day, with many at high risk of serious complications from COVID-19. Unfortunately, to date only a fraction of patients eligible for antibody treatments have received them, which we hope will change based on this updated FDA authorization. REGEN-COV is readily available and supplied free of charge by the U.S. government," said George D. Yancopoulos, M.D., Ph.D., President and Chief Scientific Officer at Regeneron. "REGEN-COV has also demonstrated potency against the main variants of concern to date in vitro and is the only antibody therapy currently available across the U.S., including in states where variants first identified in Brazil and South Africa are circulating at a higher rate."

REGEN-COV is authorized for use under an EUA to treat mild-to-moderate COVID-19 in adults and pediatric patients (12 years of age and older weighing ≥40 kg) with positive results of direct SARS-CoV-2 viral testing, and who are at high risk for progression to severe COVID-19, including hospitalization or death. The Fact Sheet updates remove the previously authorized 2,400 mg IV REGEN-COV dose.