Chemotherapy is a common treatment method for cancer that involves the use of drugs to kill cancer cells. These drugs can be delivered through pills or injections, and they work by targeting rapidly dividing cells, such as cancer cells. Chemotherapy is often used in combination with other treatments, such as surgery or radiation therapy, to help shrink tumors, prevent cancer from spreading, and alleviate symptoms. While chemotherapy can be effective in killing cancer cells, it can also have side effects, such as nausea, hair loss, and fatigue, due to the fact that it also affects healthy cells that divide rapidly. Researchers continue to study and develop new chemotherapy drugs and treatment regimens to improve outcomes and minimize side effects for patients with cancer.