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KEYTRUDA is an anti-PD-1 therapy developed by Merck. Credit: Copyright © 2023 Merck & Co., Inc., Rahway, NJ, USA and its affiliates. All rights reserved. Keytruda 100mg/4mL Vial and Carton 2015 Merck has secured approval from the US Food and Drug Administration (FDA) for KEYTRUDA (pembrolizumab) in combination with Padcev (enfortumab vedotin-ejfv) for first-line treatment of some adult patients with locally advanced or metastatic urothelial carcinoma (la/mUC). KEYTRUDA is an anti-PD-1 therapy developed by Merck , while Padcev has been developed by Astellas and Seagen . The combination therapy can be used to treat la/mUC patients who do not qualify for cisplatin-containing chemotherapy. Merck stated that the regulatory approval represents the first of its kind received by an anti-PD-1 therapy in combination with an antibody-drug conjugate for use in targeted patients in the US. It is supported by objective response rates (ORR) and median duration of response (DOR) in combined dose escalation/cohort A and cohort K of the Phase lb/ll KEYNOTE-869 study, also known as the EV-103 trial . The trial was jointly conducted by Seagen and Astellas. Results showed that patients treated with Padcev along with KEYTRUDA achieved a confirmed ORR of 68%. 12% experienced a complete response and 55% a partial response. Merck Research Laboratories senior vice-president, global clinical development head and chief medical officer Dr Eliav Barr said: “This approval is a major milestone in the treatment of patients with locally advanced or metastatic urothelial carcinoma because it is the first approved combination of an immunotherapy and an antibody-drug conjugate for these patients. “This expands the use of KEYTRUDA-based regimens to more patients with advanced urothelial carcinoma, and demonstrates the value of collaboration in creating new combination approaches for patients in need of more options.”