ABSTRACT
Background: Whether ivermectin, with a maximum targeted dose of 600 mug/ kg, shortens symptom duration or prevents hospitalization among outpatients with mild to moderate coronavirus disease 2019 (COVID-19) remains unknown. Our objective was to evaluate the effectiveness of ivermectin, maximum targeted dose of 600 mug/kg, daily for 6 days compared with placebo for the treatment of early mild to moderate COVID-19. Method(s): ACTIV-6, an ongoing, decentralized, randomized, double-blind, placebo-controlled, platform trial, was designed to evaluate repurposed therapies in outpatients with mild to moderate COVID-19. A total of 1206 participants age >=30 years with confirmed COVID-19, experiencing >=2 symptoms of acute infection for <=7 days, were enrolled from February 16, 2022, through July 22, 2022, with follow-up data through November 10, 2022, at 93 sites in the US. Participants were randomized to receive ivermectin, with a maximum targeted dose of 600 mug/kg (n=602), daily vs placebo daily (n=604) for 6 days. The primary outcome was time to sustained recovery, defined as at least 3 consecutive days without symptoms. The 7 secondary outcomes included a composite of hospitalization, death, or urgent/emergent care utilization by day 28. Result(s): Among 1206 randomized participants who received study medication or placebo, median (interquartile range) age was 48 (38-58) years;713 (59%) were women;and 1008 (84%) reported >=2 SARS-CoV-2 vaccine doses. Median time to recovery was 11 (11-12) days in the ivermectin group and 11 (11-12) days in the placebo group. The hazard ratio (HR) (95% credible interval [CrI], posterior probability of benefit) for improvement in time to recovery was 1.02 (0.92-1.13;P[HR >1]=0.68). In those receiving ivermectin, 34 (5.7%) were hospitalized, died, or had urgent or emergency care visits compared with 36 (6.0%) receiving placebo (HR 1.0, 0.6-1.5;P[HR< 1]=0.53). In the ivermectin group, 1 participant died and 4 were hospitalized (0.8%);2 participants (0.3%) were hospitalized in the placebo group and there were no deaths. Adverse events were uncommon in both groups. Conclusion(s): Among outpatients with mild to moderate COVID-19, treatment with ivermectin, with a maximum targeted dose of 600 mug/kg daily for 6 days, compared with placebo did not improve time to recovery. These findings do not support the use of ivermectin in patients with mild to moderate COVID-19. Primary and secondary outcomes.