NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,459 terms related to cancer and medicine.
We offer a widget that you can add to your website to let users look up cancer-related terms. Get NCI’s Dictionary of Cancer Terms Widget.
- naltrexone hydrochloride
- listen (nal-TREK-sone HY-droh-KLOR-ide)
- A drug that blocks the action of opiates (drugs used to treat pain). It may be used in the treatment of intravenous opiate addiction or alcohol dependence. Naltrexone hydrochloride is also being studied in the treatment of breast cancer. It may block the effects of the hormone estrogen, which causes some breast cancer cells to grow, or block the blood flow to tumors. It is a type of opiate antagonist. Also called ReVia and Vivitrol.