Teprotumumab

Teprotumumab is a fully human IgG1 monoclonal antibody directed against the human insulin-like growth factor-1 receptor. Following a clinical trial in which its efficacy in the treatment of thyroid eye disease (TED) was assessed, it received "breakthrough therapy" designation from the FDA in 2016 and was approved by the FDA in January 2020 for the treatment of TED. Thyroid eye disease is a potentially debilitating complication of Graves' Disease involving inflammation and tissue remodeling behind the eye, and previous treatment options typically involved multiple invasive surgeries - teprotumumab is the first drug ever approved for the treatment of TED and therefore represents a significant step forward in the treatment this disease.