FDA Grants Priority Review for Daiichi Sankyo's NDA for FLT3 Inhibitor Quizartinib

Daiichi Sankyo announced the U.S. Food and Drug Administration (FDA) has accepted a New Drug Application (NDA) and granted Priority Review for quizartinib for the treatment of adult patients with relapsed/refractory FLT3-ITD acute myeloid leukemia (AML).

A Priority Review designation is granted by the FDA to drugs that, if approved, would be significant improvements in the safety or effectiveness of the treatment, diagnosis or prevention of serious conditions when compared to standard applications. Under Priority Review, the FDA aims to take action on an application within six months as compared to 10 months under standard review. The FDA is expected to make a decision on approval by May 25, 2019.

The NDA is based on results of the pivotal phase 3 QuANTUM-R study of quizartinib, which 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. Topline results of the phase 3 QuANTUM-R study were presented during the plenary program at the 23rd Congress of the European Hematology Association in June 2018, and new analyses will be presented during an oral presentation at the 60th Annual Meeting of the American Society of Hematology on Monday, December 3.

"If approved, quizartinib has the potential to meaningfully advance treatment for patients with relapsed or refractory FLT3-ITD AML. Patients need more treatment options for this type of AML, which is particularly aggressive and difficult to treat. We are pleased that the FDA has filed our application for quizartinib for patients with relapsed or refractory FLT3-ITD AML, and granted priority review," said Arnaud Lesegretain, Vice President, Oncology Research and Development and Head, AML Franchise, Daiichi Sankyo. "Coupled with the recent acceptances of marketing applications for quizartinib in Japan and EU, we look forward to working with regulatory authorities in the U.S., Japan and EU to bring quizartinib to patients."

In addition to FDA priority review, quizartinib is currently under expedited regulatory review with the Japan Ministry of Health, Labour and Welfare (MHLW) and the European Medicines Agency (EMA) for the treatment of adults with relapsed or refractory AML which is FLT3-ITD positive.

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