Docetaxel is a chemotherapy drug used in the treatment of breast, prostate, lung, and gastric cancers, among others. It is frequently used either alone or in combination with other anticancer agents.

It is part of the taxane class of chemotherapy agents and is structurally related to paclitaxel, with similar mechanisms of action but different pharmacological properties.

Docetaxel works by interfering with the microtubule network inside cancer cells. These structures are essential for cell division, and by stabilizing them, docetaxel may prevent cancer cells from successfully completing mitosis. This disruption may lead to reduced tumor growth and eventual cell death.

Because this mechanism also affects normal rapidly dividing cells, side effects such as fatigue, lowered blood counts, and hair loss may occur. The extent of these effects can vary depending on the individual and treatment regimen.