Abstract
Bemnifosbuvir, a novel, oral, nonmutagenic, nonteratogenic nucleotide analogue inhibits SARS-CoV-2 replication in vitro. Adults in hospital settings with moderate COVID-19 were randomized 1:1 bemnifosbuvir/placebo. Study amended to two parts after interim analysis; part B enrollment limited owing to evolving standard of care. Although the study ended early and did not meet the primary efficacy end point, bemnifosbuvir was well tolerated and did not contribute to all-cause mortality. Compared with placebo, bemnifosbuvir treatment resulted in 0.61log10 greater viral load mean change on day 2; trend sustained through day 8. Treatment-emergent adverse events were similar in both groups; most were mild/moderate, unrelated to study drug. Our results suggest a potential role for bemnifosbuvir in blunting COVID-19 progression. NCT04396106 (ClinicalTrials.gov).
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