What is chemotherapy made up of?

Different medicines: Chemotherapy is a group of medicines, given through the vein or by mouth, that can kill cancer cells. The first "chemotherapy" was a chemical used in warfare, which is how it got the name. The medicines block different pathways used by the cancer cell to survive. There are hundreds of different chemotherapy medicines.

Medicines: These are drugs and medications that are given by intravenous, intraarterial, or oral routes in most cases. The drugs are made by companies (pharmaceutical) who manufacture them from chemicals and molecules.

Chemicals: Chemotherapy consists of chemicals made in the lab or from naturally occuring substances. These chemicals are manifactured like other drugs such as antibiotics but they preferably attack and damage cancer cells causing them to be damaged and their subsequent death.