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Osimertinib is in a class of medications called kinase inhibitors. It works by blocking the action of the abnormal protein that signals cancer cells to multiply. This helps stop or slow the spread of cancer cells and may help shrink tumors.
Osimertinib is used as the first treatment for a certain type of nonsmall-cell lung cancer (NSCLC) that has spread to other parts of the body. It is also used in people who could not be treated successfully with other similar chemotherapy medications. Osimertinib is in a class of medications called kinase inhibitors.