Chemotherapy uses cytotoxic drugs to destroy cancer. These drugs do not only alter the way in which cancer cells grow and divide, but they may also affect normal cells.
Chemotherapy is usually given during as part of a treatment session. Usually, after each session you will have a two-week rest period, which will allow your body to recover from the side effects.
Treatment is highly organized according to different phases, using all effective drugs available concomitantly and/or sequentially and including periods of rest. Your specialist will decide how many cycles you will have.