🧠 TL;DR Imatinib is one of the earliest targeted cancer therapies and changed how modern cancer treatment works It blocks a specific cancer-driving protein called BCR-ABL, which is why it works so well in CML and selected other cancers Commonly used in CML, GIST, Philadelphia-positive leukemias, mastocytosis and selected rare tumors It is a tablet (not an injection) because tablet absorption is already highly effective Missing one dose usually does not cause major harm, but