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Herceptin - Metastatic Breast Cancer Treatment Herceptin is the approved antibody for the treatment of metastatic breast cancer for patients whose tumors overexpress the HER2 protein and who have not received chemotherapy for their metastatic disease.
Breast Cancer Care - Herceptin Herceptin is a drug that treats breast cancer and improves the way the body fights the breast cancer cells. It belongs to a new group of drugs called monoclonal antibodies.