Contradicting earlier trials, Tocilizumab did not improve outcomes, with signs of harm, in patients with severe Covid-19

Effect of tocilizumab on clinical outcomes at 15 days in patients with severe or critical coronavirus disease 2019: randomised controlled trial – The BMJ

Commentaries: Conflicting COVID-19 results for Roche arthritis drug show more trials needed – Reuters AND Covid-19: Arthritis drug trial for severe illness is stopped early after increase in deaths – The BMJ

Related research (study and commentaries): [Preprint] Randomized trial: Arthritis drugs improve survival in critically ill patients with Covid-19