Glasdegib Impurities refer to the unwanted or residual substances that may be present in the Glasdegib drug substance or finished product. These impurities can be formed during the manufacturing, storage, or transportation of the drug and can potentially pose a risk to patients if present in high levels. Therefore, it is essential to monitor and control the levels of these impurities throughout the drug development process to ensure the safety and efficacy of the final product.