Mifeprex, also known as mifepristone, is a medication used to terminate early pregnancy. Unlike surgical abortion, Mifeprex can be taken in the comfort of your own home and is considered safe and effective when used as directed. #Mifeprex works by blocking the hormone progesterone, which is necessary for a pregnancy to continue. The medication is usually taken in combination with another medication, misoprostol, which causes the uterus to contract and expel the pregnancy. If you're considering your options for ending a pregnancy, talk to your healthcare provider about whether Mifeprex might be right for you.