<qa>  What is the triple drug combination of gemcitabine, trastuzumab, andRationale: Previous studies have demonstrated the anti-tumor efficacy of gemcitabine and trastuzumab against metastatic breast cancer when given alone and in combination. Yet, research indicates that the two drugs given together work more effectively than either alone. Laboratory studies testing the combination of trastuzumab and cisplatin have shown synergistic anti-tumor activity with the two drugs. In addition, clinical studies suggest a high level of anti-tumor activity with the combination of gemcitabine and cisplatin. Researchers are testing the triple drug combination of gemcitabine, trastuzumab, and cisplatin in the current study to evaluate the potential for enhanced responsiveness in patients with Her-2neu overexpressing breast cancer as well as comparing it to the double drug combination of gemcitabine and trastuzumab. 