The FDA approved the monoclonal antibody Herceptin (Trastuzumab) for treatment of metastatic breast cancer

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On Sept. 25, 1998, the U.S. Food and Drug Administration (FDA) approved the monoclonal antibody Herceptin (Trastuzumab) for treatment of metastatic breast cancer in patients with tumors that produce excess amounts of a protein called HER-2.

Approximately 30% of breast cancer tumors produce excess amounts of HER-2.

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Source: U.S. Food and Drug Administration
Credit: PDF: Genentech approval letter from FDA.