Erlotinib is a type of targeted therapy drug called a tyrosine kinase inhibitor. Kinases are proteins that help control how cells grow and divide.
Erlotinib blocks (inhibits) signals within the cancer cells and stops the action of a protein called epidermal growth factor receptor (EGFR). Blocking the signals causes the cells to die. This may shrink a cancer or stop it growing for a time.
It is best to read this with our general information about the type of cancer you have. During treatment, you will see a cancer doctor and a cancer nurse. This is who we mean when we mention a doctor or nurse in this information.