(5-Fluorouracil, 5-FU)

5-Fluorouracil (5-FU) is a chemotherapy drug used to treat certain cancers. It works by interfering with the ability of rapidly dividing cancer cells to produce DNA and RNA, which are essential for cell growth and survival. By blocking these processes, 5-FU helps slow down or stop the spread of tumor cells. It is typically administered through injections or topical creams, depending on the cancer type. While effective, it can also affect healthy fast-dividing cells, leading to side effects like skin irritation, mouth sores, or reduced blood cell production.