Review Extended on Daiichi Leukemia Drug
FDA has extended by three months the review of a Daiichi Sankyo NDA for quizartinib, an investigational FLT3 inhibitor currently under priority review for treating adult patients with relapsed/refractory FLT3-ITD acute myeloid leukemia (AML). The extension is necessary for FDA to review a agency-requested data submission, according to the company. The new user fee review action date is 8/25.
The original submission was based on data from the Phase 3 QuANTUM-R study of quizartinib, which Daiichi Sankyo says was the first randomized Phase 3 study to show that a FLT3 inhibitor prolonged overall survival as an oral, single agent compared to chemotherapy in patients with relapsed/refractory FLT3-ITD AML. FLT3 gene mutations are one of the most common genetic abnormalities in AML, the company says.