Arthritis drug Tocilizumab shows promise in tests against COVID-19: https://www.bbc.com/news/health-55002339
Another arthritis drug, baricitinib, is approved by the FDA for emergency use in COVID patients: https://www.fda.gov/news-events/press-announcements/coronavirus-covid-19-update-fda-authorizes-drug-combination-treatment-covid-19