When cancer becomes an enemy to a man, women, or child, the number one and most effective treatment of the cancer is chemotherapy. To an outside observer, chemotherapy is just another method of cancer treatment. When in fact, there is much more to the process. Not many people actually know what chemotherapy is nor do they know how it is applied. Chemotherapy is a form of cancer treatment in which medical drugs are taken orally, injected into the bloodstream, or a cream to rub on the skin. The chemotherapy can be used to cure cancer, lessen the chance it will return or stop or slow the growth of the cancer cells. Along with the cancer comes side effects. Chemotherapy can also be used to shrink tumors that are causing pain and other problems