222 patients with disseminated breast cancer have been randomised to receive either a combination of hormone therapies using tamoxifen, aminoglutethimide with hydrocortisone, and danazol (TAD), or tamoxifen alone. The response to the combination was significantly better (43%) than that to tamoxifen alone (31%). Patients who relapsed after response or failed to respond to tamoxifen were subsequently treated with aminoglutethimide and then, if possible, with danazol. Some patients who received TAD were subsequently treated with alternative endocrine therapy, which was usually medroxyprogesterone acetate. Of the 111 patients who initially received tamoxifen, 43 responded to the tamoxifen and/or subsequent endocrine therapy. Of the 111 patients who initially received TAD, 50 responded. Although the duration of response to TAD was the same as for tamoxifen, the TAD patients achieved remission more quickly. The total time in endocrine remission for patients receiving TAD is 303 months to date, compared with 264 months for patients receiving tamoxifen. Survival for patients randomised to receive TAD or tamoxifen is the same.