Atea Pharmaceuticals, Inc. announced the dosing of the first patient in the Phase 2 bemnifosbuvir and ruzasvir combination study for the treatment of Hepatitis C Virus (HCV) infection. The open label Phase 2 study is designed to enroll approximately 280 HCV-infected, direct-acting antiviral naive patients across all genotypes, including a 60 patient lead-in cohort. Patients will be administered 550 mg bemnifosbuvir in combination with 180 mg ruzasvir once-daily for eight weeks.

The primary endpoints of the study are safety and sustained virologic response (SVR) at Week 12 post-treatment. Other virologic endpoints include virologic failure, SVR at Week 24 post-treatment and resistance. Preliminary data from the 60 patient lead-in cohort are anticipated in the fourth quarter of 2023.