Systematic Review on Treatment Trials of Tocilizumab: A Repurposing Drug against COVID-19.

Abstract

Coronavirus disease (COVID-19) caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) has become a global issue today. There exists an ongoing health crisis all over the world, and efficacious drugs against COVID-19 are not available yet. Therefore, on an urgent basis, scientists are looking for safe and efficacious drugs against SARSCoV- 2. The reported individual patient data and clinical outcomes, including the rate of recovery and mortality, patients' characteristics, and complications, are reviewed. Randomized controlled trials, single-center cohort studies, and different case studies are provided, and the PICO model is used to illustrate the outcomes. There exist several FDA (U.S Food and Drug Administration) approved anti coronavirus drugs that sometimes are unsuccessful in curing COVID-19 critical conditions. It has been observed that a humanized monoclonal antibody, Tocilizumab (licensed for the treatment of rheumatoid arthritis), targeting the interleukin-6 (IL-6) receptor, has an integral role in the treatment of COVID-19. The cause behind the mortality of COVID-19 patients was found to be the Cytokine Release Syndrome (CRS). Therefore, besides other antiviral drugs, the utilization of tocilizumab should also be considered as it can effectively block IL-6 and reduce the inflammatory signal.