Effect of Early Treatment with Ivermectin among Patients with Covid-19
Gilmar Reis, Eduardo A S M Silva, Daniela C M Silva, Lehana Thabane, Aline C Milagres, Thiago S Ferreira, Castilho V Q Dos Santos, Vitoria H S Campos, Ana M R Nogueira, Ana P F G De Almeida, Eduardo D Callegari, Adhemar D F Neto, Leonardo C M Savassi, Maria I C Simplicio, Luciene B Ribeiro, Rosemary Oliveira, Ofir Harari, Jamie I Forrest, Hinda Ruton, Sheila Sprague, Paula Mckay, Christina M Guo, Karen Rowland-Yeo, Gordon H Guyatt, David R Boulware, Craig R Rayner, Edward J Mills
New England Journal of Medicine, doi:10.1056/nejmoa2115869
BACKGROUND The efficacy of ivermectin in preventing hospitalization or extended observation in an emergency setting among outpatients with acutely symptomatic coronavirus disease 2019 (Covid-19), the disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is unclear.
METHODS We conducted a double-blind, randomized, placebo-controlled, adaptive platform trial involving symptomatic SARS-CoV-2-positive adults recruited from 12 public health clinics in Brazil. Patients who had had symptoms of Covid-19 for up to 7 days and had at least one risk factor for disease progression were randomly assigned to receive ivermectin (400 μg per kilogram of body weight) once daily for 3 days or placebo. (The trial also involved other interventions that are not reported here.) The primary composite outcome was hospitalization due to Covid-19 within 28 days after randomization or an emergency department visit due to clinical worsening of Covid-19 (defined as the participant remaining under observation for >6 hours) within 28 days after randomization.
RESULTS A total of 3515 patients were randomly assigned to receive ivermectin (679 patients), placebo (679), or another intervention (2157). Overall, 100 patients (14.7%) in the ivermectin group had a primary-outcome event, as compared with 111 (16.3%) in the placebo group (relative risk, 0.90; 95% Bayesian credible interval, 0.70 to 1.16). Of the 211 primary-outcome events, 171 (81.0%) were hospital admissions. Findings were similar to the primary analysis in a modified intention-to-treat analysis that included only patients who received at least one dose of ivermectin or placebo (relative risk, 0.89; 95% Bayesian credible interval, 0.69 to 1.15) and in a per-protocol analysis that included only patients who reported 100% adherence to the assigned regimen (relative risk, 0.94; 95% Bayesian credible interval, 0.67 to 1.35). There were no significant effects of ivermectin use on secondary outcomes or adverse events.
CONCLUSIONS Treatment with ivermectin did not result in a lower incidence of medical admission to a hospital due to progression of Covid-19 or of prolonged emergency department observation among outpatients with an early diagnosis of Covid-19. (Funded by FastGrants and the Rainwater Charitable Foundation; TOGETHER ClinicalTrials.gov number, NCT04727424.
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'published-online': {'date-parts': [[2022, 3, 30]]},
'container-title': ['New England Journal of Medicine'],
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'language': 'en',
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'deposited': { 'date-parts': [[2022, 3, 30]],
'date-time': '2022-03-30T21:00:31Z',
'timestamp': 1648674031000},
'score': 1,
'resource': {'primary': {'URL': 'http://www.nejm.org/doi/10.1056/NEJMoa2115869'}},
'subtitle': [],
'short-title': [],
'issued': {'date-parts': [[2022, 3, 30]]},
'references-count': 21,
'alternative-id': ['10.1056/NEJMoa2115869'],
'URL': 'http://dx.doi.org/10.1056/nejmoa2115869',
'relation': {},
'ISSN': ['0028-4793', '1533-4406'],
'issn-type': [{'value': '0028-4793', 'type': 'print'}, {'value': '1533-4406', 'type': 'electronic'}],
'subject': ['General Medicine'],
'published': {'date-parts': [[2022, 3, 30]]}}