FDA gives accelerated approval to Keytruda (pembrolizumab) in recurrent or metastatic head and neck squamous cell carcinoma- Merck Inc

The FDA has approved Keytruda (pembrolizumab), from Merck Inc, at a fixed dose of 200 mg every three weeks, for the treatment of patients with recurrent or metastatic head and neck squamous cell carcinoma (HNSCC) with disease progression on or after platinum-containing chemotherapy. Under the FDA�s accelerated approval regulations, this indication for Keytruda is approved based on tumor response rate and durability of response. Continued approval for this indication may be contingent upon verification and description of clinical benefit in the confirmatory trials. For HNSCC patients, PD-L1 testing is not needed prior to use of Keytruda.

The approval is based on data from the KEYNOTE-012 study, which included patients with recurrent or metastatic HNSCC who had disease progression on or after platinum-containing chemotherapy or following platinum-containing chemotherapy administered as part of induction, concurrent, or adjuvant therapy and ECOG performance status (PS) of zero or one. The data showed an objective response rate (ORR) of 16 percent, complete response rate of five percent, with responses of six months or longer observed in 82 percent (n=23/28) of the responding patients. ORR and duration of response were similar regardless of human papilloma virus (HPV) status. Immune-mediated adverse reactions occurred with Keytruda including pneumonitis, colitis, hepatitis, endocrinopathies, and nephritis. Based on the severity of the adverse reaction, Keytruda should be withheld or discontinued and corticosteroids administered.