Treatment Chemotherapy

The underlying principle of chemotherapy is to kill the cancer by treating them with chemicals that interfere with the process of cell division. They do this either by damaging the proteins involved, or by damaging the DNA itself. This causes the damaged cells to commit suicide (by apoptosis).
Chemotherapy drugs are effective against cancer cells because these cells divide rapidly, whereas most normal cells in your body do not. However, some cells in your body, such as bone marrow cells, immune cells and hair follicle cells also divide rapidly and are often damaged during chemotherapy. As a result, chemotherapy drugs often have unpleasant side effects such as nausea, hair loss and vomiting.

read more at http://info.cancerresearchuk.org/cancerandresearch/learnaboutcancer/treatment/chemotherapy/?a=5441