👉 Fluorouracil, also known as 5-fluorouracil (FUR), is a drug used to treat certain types of cancer. It works by inhibiting DNA repair mechanisms in cells that are damaged or have undergone genetic mutations. This can help prevent the growth and spread of cancer cells. In clinical practice, fluorouracil is often given as a pill or chewable tablet. The exact mechanism of action for fluorouracil varies between different types of cancer