Definition of methylnaltrexone bromide - NCI Dictionary of Cancer Terms

Page Options

	Quick Links


	Director's Corner Updates from the Director Dictionary of Cancer Terms Cancer-related terms NCI Drug Dictionary Definitions, names, and links Funding Opportunities Research and training NCI Publications Order/download free booklets Advisory Boards and Groups Information, meetings, reports Science Serving People Learn more about NCI Español Información en español

Questions about cancer?


	1-800-4-CANCER

	LiveHelp® online chat

Quit Smoking Today

	NCI Highlights


	Report to Nation Finds Declines in Cancer Incidence, Death Rates High Dose Chemotherapy Prolongs Survival for Leukemia Prostate Cancer Study Shows No Benefit for Selenium, Vitamin E The Nation's Investment in Cancer Research FY 2009 Past Highlights

Search for

Starts with

Contains

In English En español

methylnaltrexone bromide (MEH-thul-nal-TREK-sone BROH-mide)

A drug used to relieve certain side effects caused by treatment with opiods (pain killers similar to morphine), such as constipation (hard, dry stools), itching, and low urine flow. Methylnaltrexone bromide binds to opioid receptors outside the brain and may block the side effects of opioid drugs without affecting their ability to relieve pain. Methylnaltrexone bromide is a type of peripheral opioid receptor antagonist. Also called Relistor.

Previous Definitions:	methotrexate, methoxsalen, methoxypolyethylene glycol epoetin beta, methyl-5-aminolevulinate, methylnaltrexone
Next Definitions:	methylphenidate, methylprednisolone, metoclopramide, metronidazole, metronomic therapy