In Brief: Keytruda Qlex – A Subcutaneous Formulation of Pembrolizumab

The programmed death receptor-1 (PD-1) blocking antibody pembrolizumab (Keytruda – Merck), which has been available in an IV formulation since 2014 for treatment of various malignancies, has now been approved in a subcutaneous formulation as Keytruda Qlex. Keytruda Qlex is the first immune checkpoint inhibitor to become available in the US that can be administered subcutaneously. It has been approved for 38 of the 41 solid tumor indications that Keytruda is approved for. Keytruda's patent exclusivity expires in 2028.