Chemotherapy is mainly used in the treatment of a tumor disease, especially used in the fight against cancer. There are the so-called adjuvant chemotherapy and neoadjuvanten. The adjuvant chemotherapy is following a surgery or a performed radiotherapy. Tumor remnants may still be available but micro-metastasis will be killed. When neoadjuvanten chemotherapy is performed, the tumor and the damaged tumor mass will be reduced before a planned surgery or radiotherapy takes place. While chemotherapy is patient with medication, known as cytostatics, treated the cells or kill the growth of malignant inhibiting cells. The used cytostatics or chemotherapeutic agents can be either naturally occurring or synthetic substances. The often-feared side effects of chemotherapy are now very well controlled with additional medication. Under a very specific medication to the patient / the patient agreed treatment plan, are prepared by the treating oncologist that is taking a precise plan. Thus, the nausea is not completely avoided but if significantly compared to earlier chemo, it is made more bearable. Changes in the blood are regularly monitored during chemotherapy. Chemotherapy must be changed and the physical state of the patient is to be adjusted. This can include blood transfusions to strengthen the immune system of patients. In most cases that occur in patients who receive chemotherapy, hair losses occur more frequently. This can be covered by buying good wigs, of which the health insurance subsidy cost per part, with headscarves or obscure hats are included. It is important to have a good and nutritious diet during chemotherapy to ensure obtainable body forces. Side effects The side effects of chemotherapy depend on the type of therapy and individual tolerance. The individual effects are independently and can be completely absent or occur in different thicknesses. They are referred to the Common Toxicity Criteria. In addition to the listed side effects, there may be a temporary or permanent infertility. Therefore, in men, if desired by the patient before beginning treatment is to have a precautionary donor sperm for later in vitro fertilization is made. Fertility-preserving measures for women are possible, however, some of which are still experimental.