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CompletedPhase 2

A Phase 2, Safety and Efficacy of Bemnifosbuvir (BEM) and Ruzasvir (RZR) in Subjects With Chronic HCV

Key facts

Who runs it
Atea Pharmaceuticals, Inc.
Where
San Antonio, United StatesSee the siteAlso in 13 other countries, 49 sites
Status
Completed
Phase
Phase 2
People taking part
275 people enrolled
Started
30 May 2023
Ended
28 Jan 2025
Type of study
Interventional
Treatments tested
  • Bemnifosbuvir
  • Ruzasvir
Record updated
21 October 2025

Who can take part

Age
18 years to 85 years
Sex
Women and men
Healthy volunteers
Cannot take part

The registry criteria, word for word

Show all 17 criteriaShow less

Who can take part

  • Willing and able to provide written informed consent
  • Male or female subjects between ≥ 18 years of age (or the legal age of consent per local regulations) and ≤ 85 years of age
  • Female subjects of childbearing potential: agreement to remain abstinent (refrain from heterosexual intercourse) or to the use of an acceptable effective contraception
  • Females must have a negative pregnancy test at Screening and at Day 1 prior to dosing
  • Subjects must be direct-acting antiviral (DAA)-treatment-naïve, defined as never exposed to an approved or experimental DAA for HCV
  • Documented medical history compatible with chronic HCV
  • Liver disease staging assessment as follows:; Absence of cirrhosis (F0 to F3); Compensated cirrhosis (F4)

Who cannot take part

  • Abuse of alcohol and/or illicit drug use that could interfere with adherence to study requirements as judged by the investigator
  • Prior exposure to any HCV DAA
  • Use of other investigational drugs within 30 days of dosing or plans to enroll in another clinical trial of an investigational agent while participating in the present study
  • Co-infected with hepatitis B virus (HBV; positive for hepatitis B surface antigen [HBsAg]) and/or human immunodeficiency virus (HIV)
  • Subject with known allergy to the study medications or any of their components
  • History or signs of decompensated liver disease: ascites, variceal bleeding, hepatic encephalopathy, spontaneous bacterial peritonitis, or other clinical signs of portal hypertension or hepatic insufficiency
  • History of hepatocellular carcinoma (HCC) or findings suggestive of possible HCC
  • Any other clinically significant medical condition that, in the opinion of the investigator, would jeopardize the safety of the subject or impact the validity of the study results
  • Female subject is pregnant or breastfeeding
  • Cirrhotic and has a Child-Pugh score >6, corresponding to a Child-Pugh Class B or C

Where in United States

Also in 13 other countries, 49 sites

  • San Antonio, TexasHospital not named in the registryNo longer taking part

About the trial

What the trial wants to find out

This is an open-label trial to evaluate safety and efficacy of treatment with BEM + RZR in subjects with chronic HCV infection.

The group in the trial

  • Bemnifosbuvir and RuzasvirTreatment being tested

    Bemnifosbuvir (BEM; AT-527) Tablets Ruzasvir (RZR; AT-038) Capsules

    Treatment: Bemnifosbuvir and Ruzasvir

Data and sources

Registry record
Listed on ClinicalTrials.gov and on the EU's official list of trials (CTIS).
Official title
A Phase 2, Open-label Study to Assess the Safety and Efficacy of Bemnifosbuvir (BEM) and Ruzasvir (RZR) in Subjects With Chronic Hepatitis C Virus (HCV) Infection
Record updated
21 October 2025