The Randomised Evaluation of COVID-19 Therapy (RECOVERY) trial has demonstrated that an anti-inflammatory treatment, tocilizumab, reduces the risk of death when given to hospitalised patients with severe COVID-19. The study also showed that tocilizumab shortens the time until patients are successfully discharged from hospital and reduces the need for a mechanical ventilator.
The RECOVERY trial has been testing a range of potential treatments for COVID-19 since March 2020. Tocilizumab, an intravenous drug used to treat rheumatoid arthritis, was added to the trial in April 2020 for patients with COVID-19 who required oxygen and had evidence of inflammation. Recruitment to the tocilizumab arm stopped on 24 January 2021 since, in the view of the trial Steering Committee, sufficient patients had been enrolled to establish whether or not the drug had a meaningful benefit.