
Herceptin (trastuzumab) is designed to target HER2+ cancer cells. Based on laboratory studies, Herceptin is thought to work in two ways to stop the HER2+ cancer cell from growing. 1

Adjuvant Care Is defined as additional treatment given after the main treatment plan to decrease the chance of recurrence. Adjuvant therapy for breast cancer can include chemotherapy, hormone therapy, radiation therapy, or biological therapy
Metastatic Breast Cancer Breast cancer that has spread to other sites in the body; also referred to as invasive or infiltrating