Over these previous years, clinicians dealing with patients with COVID infection 2019 have discovered that the abundant inflammatory response induced by the virus serves as a significant cause of the acute respiratory distress syndrome (ARDS) and multi-organ dysfunction, which happen in majority of the lethal cases. Presently, there is not a single drug available as an approved and genuine medication for corona infection, in this sphere of time immunomodulatory agents has exhibited encouraging response against coronavirus infection. The initial finding that interleukin-6 (IL-6) levels are raised in serious COVID-19 and independently foresee the risk of developing ARDS and finally death, such results had centered the clinical investigations on this pro-incendiary and pleiotropic cytokine. Tocilizumab (TCZ) is humanized anti-interleukin 6 receptor monoclonal immunizer and has been endorsed for different rheumatological ailments. Currently, many steroids as they act as an immunomodulatory agent have shown fantastic therapeutic effects while used in COVID infected peoples, such clinical data advocated the application of tocilizumab to combat corona infection. Patients who were in life threatening condition because of COVID-19 initiated pneumonia developed hyper aggravation. This medication lessens the further decay of the patient caused because of agglomeration of lymphocytic cells and diminishes the degree of high CRP (C-responsive protein). Nevertheless, several clinical investigations have been in progress to ascertain the drug profile. So that TCZ may be used in COVID patients with optimal effectiveness associated with minimum risk of adverse events. In this article, we have tried to encompass all relevant information about the pharmacology of TCZ, which will surely help to understand clinical behaviour of the drug.