PF 00299804 filed with FDA and EMA for advanced or metastatic non-small cell lung cancer.- Pfizer.

Pfizer Inc. announced that the FDA accepted the company�s New Drug Application and granted priority review for PF 00299804 (dacomitinib) for the first-line treatment of patients with locally advanced or metastatic non-small cell lung cancer (NSCLC) with EGFR-activating mutations. The European Medicines Agency has also accepted the Marketing Authorization Application for dacomitinib for the same indication. The FDA grants Priority Review to medicines that may offer significant advances in treatment or may provide a treatment where no adequate therapy exists. The Prescription Drug User Fee Act (PDUFA) goal date for a decision by the FDA is in September 2018.

The submissions are based on results from the Phase III ARCHER 1050 study, a global head-to-head trial investigating dacomitinib (n=227) compared to gefitinib (n=225) that showed dacomitinib may offer a clinically meaningful improvement over gefitinib. Patients that received dacomitinib in the study experienced a median progression-free survival (PFS) of 14.7 months compared with 9.2 months in patients treated with gefitinib, as measured by Blinded Independent Central Review (BICR). This difference represented a 41 percent reduction in the risk of disease progression or death for patients treated with dacomitinib compared with gefitinib as a first-line treatment in locally advanced or metastatic NSCLC with EGFR-activating mutations.

The adverse events (AEs) observed with dacomitinib in the study were consistent with findings from previous trials. The most common AEs were diarrhea (87%), nail changes (62%), rash/dermatitis acneiform (49%), and mouth sores (44%). The most common Grade 3 AEs with dacomitinib were rash (14%) and diarrhea (8%). Grade 4 AEs occurred in 2 percent of dacomitinib-treated patients. There was one case of Grade 5 diarrhea and one case of Grade 5 liver disease. The discontinuation rate due to treatment-related AEs for dacomitinib was 10 percent compared to 7 percent for gefitinib.

The ARCHER 1050 results were published in Lancet Oncology, shared as an oral late-breaker presentation at the 2017 American Society of Clinical Oncology (ASCO) Annual Meeting and featured in the ASCO press program. A final assessment of overall survival from ARCHER 1050 will be presented at a medical meeting later this year.