Docetaxel is widely used in the treatment of various cancers, particularly breast, prostate, gastric, and non-small cell lung cancer. It works by inhibiting cell division, effectively stopping the growth and spread of cancer cells. In breast cancer, it is often administered when the disease is locally advanced or has metastasized, and it is also used in combination with other chemotherapy drugs for better efficacy. For prostate cancer, docetaxel is typically employed in cases that are hormone-resistant, helping to prolong survival. Additionally, it plays a role in treating head and neck cancers, often in combination with radiotherapy or other chemotherapeutic agents. Its application extends to palliative care, where it helps manage symptoms and improve the quality of life for patients with advanced-stage cancers.