EIDD-2801

Biochem/physiol Actions

EIDD-2801 is an orally active, 5′-isopropylester prodrug form of the antiviral ribonucleoside analog N4-hydroxycytidine (NHC, EIDD-1931) with known anti-viral activity against SARS-CoV, SARS-CoV-2, RSV, influenza A & B (IAV & IBV), HCV, pestivirus, bovine viral diarrhoea virus (BVDV), Ebola (EBOV), Chikungunya (CHIKV), venezuelan equine encephalitis (VEEV). EIDD-2801 is efficiently hydrolyzed to NHC in vivo, being more orally bioavailable than NHC in nonhuman primates and ferrets, while maintaining similar oral bioavailability as NHC in mice. EIDD-2801 displays in vivo efficacy against pandemic and seasonal IAV strains in ferrets (lowest ED = 2.3 and 7 mg/kg b.i.d. p.o., respectively).