Similar association has been studied with docetaxel. In a phase I trial combining docetaxel and estramustine19, 53% of patients reported a decrease in narcotic use and 63% experienced a PSA response. In another phase I trial, a reduction in PSA of 50% or more was observed in 14 of 17 patients (82%)20. In a phase II trial involving 35 patients, a PSA response was reported in 74% of the patients and objective response in 4 out of 7 patients with measurable disease21. Median survival 22 months in this last study. These studies as well as other support the combination of estramustine and docetaxel in the treatment of HRPC22, 23.