Chemotherapy

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.