Ontruzant Trastuzumab-Dttb Injection 150 mg Cancer Medicine **Refrigeration Required** (RX)Ontruzant Trastuzumab Dttb Injection 150 mg is a cancer medication used to treat certain types of breast, stomach, and gastroesophageal junction cancers that overexpress the HER2 protein. This injection contains the active ingredient trastuzumab dttb and belongs to a class of drugs known as monoclonal antibodies. It works by binding to the HER2 protein on cancer cells and blocking their growth and division, ultimately leading to cell death. Ontruzant