 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST] venous: Trastuzumab is used to treat certain types of breast, stomach, or esophagus cancer. This medication is used to treat tumors that produce more than the normal amount of a certain substance called HER2 protein. Trastuzumab belongs to a class of medications known as monoclonal antibodies. It works by slowing or stopping the growth of cancer cells.This monograph is about the following trastuzumab products: trastuzumab, trastuzumab-anns, trastuzumab-dkst, trastuzumab-dttb, trastuzumab-pkrb, trastuzumab-qyyp. How to use Herzuma 420 Mg Intravenous Solution Antineoplast EGF Receptor Blocker Recomb Monoclonal Antibody This medication is given by slow injection into a vein by a health care professional, usually once every week or once every 3 weeks. The first injection is given over at least 90 minutes. The dosage is based on your medical condition, response to treatment, weight, and other medications you may be taking. Be sure to tell your doctor and pharmacist about all the products you use (including </s>