Chemotherapy is the use of chemicals or drugs (cytotoxic agents) in the treatment of cancer given by:
Mouth - a few drugs are given as tablets or capsules
Intramuscularly - a few drugs are given by injection into a muscle or under the skin
Intravenously - most of the drugs are given by an injection into the forearm or the back of the hand. A small needle is put through the skin into a vein and a drug solution injected slowly. The drug is distributed throughout the body via the blood stream.