Gemcitabine is primarily used as an anticancer medication, particularly in the treatment of various types of cancers. It is commonly administered for pancreatic cancer, often as a first-line treatment, and is also effective against non-small cell lung cancer, breast cancer, and ovarian cancer. The drug works by inhibiting the synthesis of DNA, thereby preventing cancer cells from multiplying and spreading. In clinical settings, it is often used in combination with other chemotherapy drugs to enhance its efficacy. Additionally, gemcitabine is sometimes employed in palliative care to alleviate symptoms and improve the quality of life for patients with advanced cancer. Ongoing research into its use for other malignancies continues to expand its application in oncology.