Herceptin is used for Her2 positive breast cancer. It is very expensive. In USA about 3 K per dose when you do it in the hospital or clinic. If she is Her2 positive, Herceptin helps. There are 1/4 breast cancer with Her2 positive. In USA Herciptin is used for years, but it has some side reactions. Usually it used with Chemo medicine. I know one person in Shanghai who has Her2 positive and used Herceptin. She may have insurance to cover it... There is no way you can get it from USA, I think. Good luck.