Sarilumab Pharmaceutical Description DescriptionSarilumab is a human monoclonal antibody against the interleukin-6 receptor. Regeneron Pharmaceuticals and Sanofideveloped the drug for the treatment of rheumatoid arthritis, for which it received US FDA approval on 22 May 2017 and European Medicines Agency approval on 23 June 2017. Wikipedia Bioavailability: 80% Target: IL-6R Elimination half-life: 21 days (steady-state, estimated) Formula: C6388H9918N1718O1998S44