Chemotherapy is the use of anti-cancer (cytotoxic) drugs to destroy cancer cells. They work by disrupting the way cancer cells grow and divide, but they also affect normal cells.
The chemotherapy you have depends on the type of lung cancer you have, its stage and how side effects are likely to affect you.
You can have chemotherapy for different reasons, depending on your situation. Your cancer doctor and specialist nurse will explain the aims of your treatment.