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- (MIH-feh-PREX) A drug used to end early pregnancies. It is also being studied in the treatment of some types of cancer and other conditions. Mifeprex blocks the action of progesterone, a hormone that helps some cancers grow. It is a type of antiprogesterone. Also called mifepristone and RU 486.
National Cancer Institute - Cite This Source - This Definition
- ACE inhibitor, angiotensin-converting enzyme inhibitor, mifepristone, RU 486