FMS‐like tyrosine kinase 3 (FLT3) is a type III receptor tyrosine kinase validated as a therapeutic target for acute myeloid leukemia (AML) and regarded as an indicator of poor prognosis. Unfortunately, current FLT3 inhibitors, such as midostaurin, quizartinib or gilteritinib, often lead to myelosuppression or cardiovascular toxicity.