 <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] umab 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 Trastuzumab-Dkst 420 Mg Intravenous Solution 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 prescription drugs, nonprescription drugs, and herbal products). Use this medication regularly to get the most benefit from it. To help you remember, mark the days on the calendar when you need to receive the medication. Your doctor may prescribe other medications (such as acetaminophen, diphenhydramine) for </s>