http://youtu.be/7k2mttExDl8 Herceptin (trastuzumab) is an FDA approved targeted therapy to treat certain types of cancer that are are HER2-positive. These are cancers that are positive for the Human Epidermal Growth Factor Receptor 2 protein. In this video, Dr. Stephen Lemon will discuss how this treatment works, as well as what types of side effects it may cause. Visit https://www.lightersideofcancer.com/ to find more cancer treatment videos from Dr. Lemon.