Herceptin Trastuzumab Injection 150 mg (RX) * Refrigeration Required *Herceptin Trastuzumab Injection 150 mg is a type of biologic cancer treatment medicine that is used to treat certain types of breast cancer, stomach cancer, and esophageal cancer. It contains the active ingredient trastuzumab, which works by targeting and blocking a protein called HER2 on the surface of cancer cells. This protein helps these cells grow and divide, and by blocking it, Herceptin can slow or stop the growth of cancer cells. This item is