Gemcitabine Injection 1gm is a chemotherapy drug used to treat cancers such as pancreatic, breast, lung, and ovarian cancer. A healthcare professional administers it intravenously. This injection works by interfering with the growth and division of cancer cells, slowing or stopping cancer spread. Gemcitabine Injection 1gm can, however, affect normal cells, resulting in side effects such as nausea, vomiting, fatigue, and decreased blood cell counts. This injection should be used as per the requirements and prescription of your doctor.