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Bemnifosbuvir · AT-527, RO7496998

Small molecule · Inhibitor of viral RNA-dependent RNA polymerase · developed by Atea Pharmaceuticals

Phase 3 Most advanced trial (none active)
AVIR Developer
17 Registered trials

What is Bemnifosbuvir?

Bemnifosbuvir is an orally bioavailable purine nucleotide prodrug that is metabolized into an active form which inhibits viral RNA-dependent RNA polymerase, terminating viral RNA transcription and replication. It is studied in COVID-19 and chronic hepatitis C virus infection.

Summary written with AI from the sources listed at the end of this page.

At a glance

Also known as
AT-527, RO7496998, AT-511
Drug type
Small molecule
Targets
viral RNA-dependent RNA polymerase
Mechanism
Inhibitor of viral RNA-dependent RNA polymerase
Pathways
viral RNA transcription, viral RNA replication
Therapy area
Infectious disease
Developer
Atea Pharmaceuticals, Inc. (AVIR)
FDA status
Investigational, not approved in the US. Most advanced trial: Phase 3
UNII
7UM3SQL968

🧪 Clinical trials

TrialPhaseConditionStatusSponsor
NCT05629962 Phase 3 Severe Acute Respiratory Syndrome Coronavirus 2 (SARS CoV 2 Infection) Completed AVIR
NCT04889040 Phase 3 COVID-19 Terminated AVIR
NCT05904470 Phase 2 Chronic Hepatitis C Virus Completed AVIR
NCT04396106 Phase 2 COVID-19 Terminated AVIR
NCT07272889 Phase 1 Healthy Volunteer Study Completed AVIR
NCT06911320 Phase 1 Healthy Volunteer Study Completed AVIR
NCT06921941 Phase 1 Healthy Volunteer Study Completed AVIR
NCT06204679 Phase 1 Healthy Volunteer Study Completed AVIR
NCT05731843 Phase 1 Healthy Volunteer Study Completed AVIR
NCT05618314 Phase 1 Healthy Volunteer Completed AVIR
NCT05256732 Phase 1 Healthy Volunteer Study Completed AVIR
NCT05154123 Phase 1 Healthy Volunteer Study Completed AVIR
NCT05137626 Phase 1 Healthy Volunteers Study Completed AVIR
NCT05004415 Phase 1 Healthy Volunteer Study Completed AVIR
NCT04865445 Phase 1 Healthy Volunteer Study Completed AVIR
NCT04849299 Phase 1 Healthy Volunteer Study Completed AVIR
NCT04711187 Phase 1 Healthy Volunteer Study Completed AVIR

Trials of the companies BioRadar tracks, from ClinicalTrials.gov, most advanced phase first.

Conditions studied

Chronic Hepatitis C VirusCOVID-19HCVHealthy VolunteerHealthy Volunteer StudyHealthy Volunteers StudyHepatic CirrhosisHepatic ImpairmentHepatitis CHepatitis C, ChronicRenal Impairment

More from Atea Pharmaceuticals

Sources

Updated Oct 11, 2026. Something wrong or missing? Report it on the AVIR page.

Follow AVIR, the company behind Bemnifosbuvir

See AVIR's upcoming FDA decisions, trial readouts, cash runway and dilution risk, updated every day from SEC, FDA and ClinicalTrials.gov filings.

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Data: FDA (Drugs@FDA, Purple Book, DailyMed), NIH (NCI Thesaurus, GSRS, RxNorm), ClinicalTrials.gov • Informational purposes only, not medical or investment advice. • All drugs A–Z

This data is for informational purposes only, not investment advice. BioRadar does not provide buy/sell recommendations. Past performance does not guarantee future results. Always do your own due diligence.