Trastuzumab, a monoclonal antibody, is used alone or with other medications to treat certain types of breast and stomach cancer. These cancers are the types who produce a lot of HER2 protein. It works by attaching to the HER2 cancer cells and blocking them from dividing and growing. It may also destroy the cancer cells or signal the body (immune system) to destroy the cancer cells.
How to use trastuzumab intravenous
Trastuzumab is not the same as trastuzumab emtansine or ado-trastuzumab emtansine. Do not substitute trastuzumab emtansine or ado-trastuzumab emtansine for trastuzumab.
This medication will be given by a health care professional. It is given slowly by vein (IV), usually once a week for breast cancer or once every 3 weeks for stomach cancer or as directed by your doctor. Your first infusion will be given over at least 90 minutes.
The dose, the speed of your injection, and the length of time you receive trastuzumab depends on your body weight, condition, other treatments, and response to trastuzumab treatment.
To get the most benefit from this medication, do not miss any doses. To help you remember, mark the days on the calendar when you need to receive the medication.
Your doctor may prescribe other medications (e.g., acetaminophen, diphenhydramine) for you to take before the start of your treatment to help prevent serious side effects.