Chemotherapy is a drug treatment to kill cancer cells and can be used as a solo treatment or in combination to treat many types of cancers. Considering these chemicals are very powerful, they are bound to cause side effects. Different chemotherapy drugs have different side effects. Fatigue, hair loss, body ache, and appetite change are some of them. Dr Pooja Babbar, Medical Oncologist, American Oncology Institute, Gurugram, lists common side effects of chemotherapy.