ArticleMuss HB, White DR, Cooper MR, Richards F, Spurr CL.
Arch Intern Med. 1977 Dec;137(12):1711-4.
A prospective randomized trial was undertaken to compare the efficacy of a three-drug regimen using cyclophosphamide, methotrexate, and fluorouracil to a five-drug regimen using vincristine sulfate and prednisone in addition to cyclophosphamide, methotrexate, and fluorouracil in advanced breast carcinoma. Seventy-two patients who had received no prior chemotherapy were randomized. Thirty-eight patients received three drugs, and 34 received five-drug therapy. The objective response rates, 34% and 50% respectively, did not differ signficantly (P = .13). As expected, myelosuppression occurred in most patients, and neurotoxicity was much more common in patients receiving vincristine. Three of 12 patients treated with the five-drug regimen after progession of disease while receiving the three-drug regiment showed an objective response to the five-drug regimen.