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Mifepristone, also known as 11β-(4-(dimethylamino)phenyl)-17α-(1-propynyl)estra-4,9-dien-17β-ol-3-one, is a synthetic estrane steroid and a derivative of steroid hormones like progesterone, cortisol, and testosterone. [48] It has substitutions at the C11β and C17α positions and double bonds at the C4(5) and C9(10) positions. [48]
Mifepristone is used in more than half of all abortions in the US. The drug was first approved for use by the US Food and Drug Administration in most cases up to 10 weeks of pregnancy in 2000.
An expert in medication abortion describes how mifepristone and misoprostol work and what to expect after using these medications known as the “abortion pill.” What a medication abortion is ...
Common abortifacients used in performing medical abortions include mifepristone, which is typically used in conjunction with misoprostol in a two-step approach. [3] Synthetic oxytocin , which is routinely used safely during term labor , is also commonly used to induce abortion in the second or third trimester .
Mifepristone is one of two drugs used in medication abortion in the U.S. But mifepristone has many uses in reproductive care and in other contexts, experts say.
The mifepristone-misoprostol combination is, by far, the most recommended drug regimen for medical abortions, but other drug combinations are available. Misoprostol alone, without mifepristone, may be used in some circumstances for medical abortion, and has even been demonstrated to be successful in the second trimester. [37]
Mifepristone is currently in the middle of a political tug-of-war, with some conservative states seeking to restrict or eliminate access to the abortion pill, while other states are trying to ...
Examples include the progesterone receptor weak partial agonist mifepristone, the selective progesterone receptor modulator (SPRM) ulipristal acetate, and the silent antagonist aglepristone. [2] [3] In medical abortion, mifepristone is combined with a prostaglandin (e.g., gemeprost), while ulipristal is used for emergency contraception. [4]