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Quizartinib

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Quizartinib

Quizartinib, sold under the brand name Vanflyta, is an anti-cancer medication used for the treatment of acute myeloid leukemia.

It is a small molecule receptor tyrosine kinase inhibitor. Its molecular target is FLT3, also known as CD135 which is a proto-oncogene. FLT3 mutations are among the most common mutations in acute myeloid leukemia due to internal tandem duplication of FLT3, and the presence of this mutation is a marker of adverse outcome.

The most common side effects of include low white blood cell counts with or without fever, reduced levels of electrolytes (potassium, magnesium or calcium) in blood, increased levels of liver or muscles enzymes, diarrhea, ulcers or redness inside the mouth (mucositis), nausea, abdominal pain, sepsis (serious infection throughout the body and organs), headache, vomiting, and upper respiratory tract infection.

It was approved for medical use in Japan in October 2019, in the United States in July 2023, and the European Union in November 2023.

Quizartinib is indicated, in combination with standard cytarabine and anthracycline induction and cytarabine consolidation, and as maintenance monotherapy following consolidation chemotherapy, for the treatment of newly diagnosed acute myeloid leukemia with FLT3 internal tandem duplication (ITD)-positive.

The US Food and Drug Administration (FDA) label includes a boxed warning noting QT prolongation, torsades de pointes, and cardiac arrest.

Quizartinib may cause harm to an unborn baby (embryo-fetal toxicity).

Quizartinib selectively inhibits class III receptor tyrosine kinases, including FMS-related tyrosine kinase 3 (FLT3/STK1), colony-stimulating factor 1 receptor (CSF1R/FMS), stem cell factor receptor (SCFR/KIT), and platelet derived growth factor receptors (PDGFRs).

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