Docetaxel is a chemotherapy medication used primarily to treat various types of cancer, including breast cancer, lung cancer, and prostate cancer. It works by inhibiting cell division, which helps to slow down or stop the growth of cancer cells. Administered through an intravenous infusion, docetaxel is often part of a combination therapy to enhance its effectiveness. Common side effects may include fatigue, nausea, and hair loss, but these can vary among individuals. Regular monitoring by healthcare professionals is essential during treatment to manage any adverse effects.