The abortion pill is mifepristone, a prescription medication that ends an early pregnancy by blocking progesterone, the hormone the body needs to sustain it. In practice, a medication abortion involves two separate drugs taken one to two days apart: mifepristone first, then a second pill called misoprostol. Together, they are FDA-approved for ending a pregnancy up to 70 days (10 weeks) from the first day of your last menstrual period.
How the Two Pills Work Together
Mifepristone and misoprostol each play a distinct role. Mifepristone binds to progesterone receptors more tightly than progesterone itself, effectively shutting down the hormonal signal that supports the pregnancy. Without that signal, the uterine lining begins to break down and the pregnancy stops developing.
Misoprostol, taken 24 to 48 hours later, triggers the uterus to contract and the cervix to soften. This causes the body to pass the pregnancy tissue in a process similar to a heavy, crampy period. The combination is effective 95 to 97 percent of the time. About 3 to 5 percent of people need a follow-up procedure because of an ongoing pregnancy, prolonged bleeding, or personal preference.
Dosing and Timing
The standard regimen is one 200-milligram tablet of mifepristone swallowed on the first day. Then, 24 to 48 hours later, you take four small tablets of misoprostol (800 micrograms total). Rather than swallowing them, you place two tablets in each cheek and hold them there for 30 minutes. Any remaining fragments are swallowed with water after that. The timing window matters: the misoprostol should not be taken sooner than 24 hours or later than 48 hours after the mifepristone.
You can use this regimen as soon as a pregnancy is confirmed, typically around four weeks, up to the 10-week limit. Earlier in pregnancy, the process tends to be faster and involves less bleeding.
What the Experience Feels Like
After taking the first pill, most people feel little or nothing. The real physical effects begin with the second pill. Within a few hours of taking misoprostol, expect heavy cramping and bleeding that’s noticeably heavier than a normal period. Passing clots is common and expected. Many people also experience nausea, diarrhea, chills, or a low-grade fever, all of which typically resolve within a few hours.
The heaviest bleeding and cramping usually last four to six hours. After that, bleeding gradually tapers over the following one to two weeks, though light spotting can continue for several weeks. Most people feel well enough to return to normal activities within a day or two of the heaviest symptoms.
Safety and Complications
Medication abortion has a strong safety record. In a study of over 11,000 patients in California, only 0.31 percent experienced a major complication, defined as hospitalization, blood transfusion, or surgery. That makes it comparable in risk to many routine medical procedures.
Signs that something needs medical attention include soaking through two or more thick pads per hour for two consecutive hours, a fever lasting more than 24 hours, no bleeding at all after taking misoprostol (which may mean it didn’t work), or pain that doesn’t respond to over-the-counter medication.
Follow-Up After the Pill
According to World Health Organization guidance, routine follow-up isn’t strictly necessary after an uncomplicated medication abortion, as long as you know what symptoms to watch for. Some providers schedule a check-in appointment one to two weeks later to confirm the pregnancy has ended, either through a physical exam, a blood test, or an ultrasound. Others use a home pregnancy test taken several weeks later, since hormone levels need time to drop.
The key things to pay attention to afterward are whether you experienced bleeding (confirming the misoprostol worked) and whether pregnancy symptoms like nausea and breast tenderness are fading over the following week. Persistent or worsening pregnancy symptoms can signal an ongoing pregnancy that needs further care.