AstraZeneca has announced that the US Food and Drug Administration (FDA) has accepted a supplemental New Drug Application (sNDA) for the use of Tagrisso (osimertinib), a third-generation, irreversible epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor (TKI) with clinical activity against central nervous system (CNS) metastases, in the 1st-line treatment of patients with metastatic non-small cell lung cancer (NSCLC) whose tumours have EGFR mutations (exon 19 deletions or exon 21 (L858R) substitution mutations).
The FDA has granted Tagrisso Priority Review status and previously granted Breakthrough Therapy Designation in the 1st-line treatment of patients with metastatic EGFR mutation-positive (EGFRm) NSCLC.
The submission acceptance is based on data from the Phase III FLAURA trial, in which Tagrisso significantly improved progression-free survival (PFS) compared to current 1st-line EGFR-TKIs, erlotinib or gefitinib, in previously-untreated patients with locally-advanced or metastatic EGFRm NSCLC.
Lung cancer is the leading cause of cancer death among both men and women, accounting for about one-quarter of all cancer deaths, more than breast, prostate and colorectal cancers combined. Approximately 10-15% of patients in the US and Europe, and 30-40% of patients in Asia have EGFRm NSCLC.
On 28 September 2017, the National Comprehensive Cancer Network Clinical Practice Guidelines in Oncology were updated to include the use of Tagrisso in the 1st-line treatment of patients with metastatic EGFRm NSCLC. The use of Tagrisso in this indication is not yet approved by the FDA.