<prompt> Tocilizumab is antibody against ?IL 2IL 4IL 6IL 8  <response>: Ans. is c i.e., IL 6 Tocilizumab It is the antibody directed against IL 6 receptor It is approved for use in : Rheumatoid ahritis Neuromyelitisoptica Castlemans disease Systemic juvenile idiopathic ahritis 