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c19early.org COVID-19 treatment researchBrequinarBrequinar (more..)
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0 0.25 0.5 0.75 1 1.25 1.5 1.75 2+ CRISIS2 Powers (DB RCT) -205% 3.05 [0.13-73.4] hosp. 1/56 0/59 Improvement, RR [CI] Treatment Control Tau​2 = 0.00, I​2 = 0.0%, p = 0.5 Early treatment -205% 3.05 [0.13-73.4] 1/56 0/59 205% higher risk All studies -205% 3.05 [0.13-73.4] 1/56 0/59 205% higher risk 1 brequinar COVID-19 study c19early.org November 2025 Tau​2 = 0.00, I​2 = 0.0%, p = 0.5 Effect extraction pre-specified(most serious outcome) Favors brequinar Favors control
Brequinar is an orally available, small molecule, host-acting antiviral that inhibits the host enzyme dihydroorotate dehydrogenase (DHODH) to block de novo pyrimidine biosynthesis, potentially inhibiting SARS-CoV-2 replication.
Apr 28
2021
Powers et al., NCT04575038 The CRISIS2 Study: A Phase 2, Randomized, Double Blind, Placebo-controlled, Multi-center Study Assessing the Safety and Anti-coronavirus Response of Suppression of Host Nucleotide Synthesis in Out-patient Adults With SARS-CoV-2
205% higher hospitalization (p=0.49) and 34% worse viral clearance. RCT 115 outpatients in the USA, showing no significant differences with brequinar treatment.
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