Widely used in chemotherapy, this compound is effective against various cancers, including non-small cell lung cancer, pancreatic cancer, breast cancer, and ovarian cancer. It works by interfering with DNA synthesis, inhibiting cancer cell replication. Administered intravenously, it is often used in combination with other chemotherapeutic agents such as cisplatin or paclitaxel to enhance treatment efficacy. In pancreatic cancer, it remains a cornerstone of treatment, both in early and advanced stages. Its ability to integrate into DNA and halt chain elongation makes it particularly potent in rapidly dividing tumor cells.