<p>Docetaxel is an antineoplastic agent, which acts by disrupting the microtubular network in cells that is essential for vital mitotic and interphase cellular functions. Docetaxel promotes the assembly of tubulin into stable microtubules while simultaneously inhibiting their disassembly. Docetaxel binds to free tubulin thereby decreasing the critical intracellular concentration of tubulin. The promoted polymerization of microtubules leads to the production of microtubule bundles without normal function and to the stabilization of microtubules, resulting in the inhibition of mitosis in cells. The binding of Docetaxel to microtubules does not alter the number of protofilaments in the bound microtubules; in that, it differs from other spindle poisons. Docetaxel was found to be cytotoxic in vitro against various murine and human tumor cell lines, and against freshly excised human tumor cells in clonogenic assays. In addition, Docetaxel was found to be active on a number of cell lines overexpressing the p-glycoprotein, which is encoded by the multidrug resistant gene.</p>