Cyclophosphamide is a widely used chemotherapy drug that is used to treat various types of cancer, including leukemia, lymphoma, and breast cancer. It works by interfering with the growth of cancer cells and is often used in combination with other chemotherapy drugs. Cyclophosphamide can be administered orally or intravenously, and may cause side effects such as nausea, hair loss, and decreased blood cell counts. Research in this area focuses on improving the effectiveness of cyclophosphamide, reducing its side effects, and identifying new ways to use this drug in cancer treatment.