Your health condition does impact your everyday life so do not let it define who you are! HERCEPTIN (trastuzumab) is a monoclonal antibody. It is used to treat new cases of breast cancer or disease that has spread to other parts of the body. HERCEPTIN (trastuzumab) is known to prevent the growth of some breast tumors that produce extra amounts of a certain protein known as the HER2 protein. HERCEPTIN (trastuzumab) should only be used in patients whose breast tumors have been observed to produce extra amounts of HER2 protein. It can be used as a stand alone medicine or pair it up with other cancer medicines (chemotherapy) such as doxorubicin, cyclophosphamide, paclitaxel, docetaxel, and carboplatin. HERCEPTIN (trastuzumab) is also very well used in combination with cisplatin and capecitabine or 5-fluorouracil to treat malignant tumor of the stomach and esophagogastric (esophagus and stomach cancer, metastatic, HER2 overexpression.Thanks and may you have a good understanding about this drug HERCEPTIN (trastuzumab).