The U.S. Food and Drug Administration has approved Merck's Keytruda Qlex, a subcutaneous formulation of the cancer drug pembrolizumab, for use in adults across most solid tumor indications. Announced on September 19, 2025, this new injectable version offers a quicker administration time compared to the traditional intravenous method, potentially enhancing patient convenience and access to treatment. The approval highlights efforts to innovate drug delivery in oncology amid growing demands for efficient therapies.