What is chemotherapy?

Chemotherapy is the treatment of cancer with chemical drugs that are designed to destroy cancer cells. Although such treatment potentially also affects normal cells; these have the ability to repair themselves, whilst damage to cancer cells is usually of a more permanent nature. Combination chemotherapy forms the basis of most chemotherapy treatment. The goal is for different drugs to be used that complement each other in their destructive effects on cancer cells whilst reducing side effects and toxic effects on normal cells. The combination of drugs also reduces the chance of cancer becoming resistant to the treatment. This can be achieved because of their different mechanisms of action and side effect profiles.