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  • Title: Docetaxel/doxorubicin/cyclophosphamide in the treatment of metastatic breast cancer.
    Author: Nabholtz JM, Smylie M, Mackey JR, Noel D, Paterson AH, al-Tweigeri T, Au D, Sansregret E, Delorme F, Riva A.
    Journal: Oncology (Williston Park); 1997 Aug; 11(8 Suppl 8):37-41. PubMed ID: 9364541.
    Abstract:
    Preliminary results from phase I trials suggest that the use of docetaxel (Taxotere) and doxorubicin (Adriamycin) is a well tolerated and highly active combination regimen for patients with metastatic breast cancer. The maximum tolerated dose of this combination was 50 mg/m2 of doxorubicin given as an intravenous bolus followed 1 hour later with 75 mg/m2 of docetaxel given as a 1-hour intravenous infusion. Because cardiotoxicity was not observed with this combination, we added cyclophosphamide (Cytoxan, Neosar) in a phase II trial to determine the antitumor activity and tolerability of this 3-drug combination as first-line therapy in patients with metastatic breast cancer. Preliminary results from this study indicate that the Taxotere/ Adriamycin/Cyclophosphamide (TAC) combination produces response rates of up to 80%. However, frequent grade 4 neutropenia was seen in 68% of cycles, febrile neutropenia in 5.5% of cycles, and grade 3 to 4 infection in .8% of cycles. Cardiac toxicity was rare, with 1 case of reversible congestive heart failure (2%), which occurred 2 months after completion of chemotherapy. These preliminary data show that TAC is highly active and that docetaxel did not significantly increase the cardiotoxicity of doxorubicin. Phase III studies in both the first-line and adjuvant settings are warranted.
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