Mifepristone vs. Misoprostol: What Each Pill Does

Mifepristone and misoprostol are the two FDA-approved medications used in the abortion pill process. They work in two different ways and are taken at two different times. Together, they are 93 to 98% effective at ending an early pregnancy.

Mifepristone is the first pill. It blocks a hormone called progesterone that the pregnancy needs to continue growing. Without progesterone, the pregnancy stops developing. You take mifepristone at the clinic during your appointment with the provider.

Misoprostol is the second medication. It causes the uterus to contract and empty, similar to a miscarriage. You take misoprostol at home, 24 to 48 hours after mifepristone. This is the step where you will experience cramping and bleeding as the pregnancy passes.

Mifepristone blocks progesterone, a hormone your body produces during pregnancy. Progesterone keeps the lining of the uterus thick and nourished, which supports the pregnancy. When mifepristone blocks progesterone, the uterine lining begins to break down and the pregnancy cannot continue.

You take mifepristone as a single pill by mouth at the clinic. The provider will give it to you during your appointment after confirming your gestational age with an ultrasound. The pill is small and easy to swallow.

Most patients do not feel significant effects from mifepristone alone. Some experience light spotting or mild nausea, but many feel normal. The major changes happen after you take misoprostol the following day. Mifepristone is doing its work quietly, preparing your body for the second medication.

Misoprostol causes the uterus to contract and push out the pregnancy tissue. It works by softening the cervix and triggering cramping, similar to what happens during a heavy period or early miscarriage. This is the active step of the abortion pill process.

You take misoprostol at home, 24 to 48 hours after taking mifepristone. The standard method is to place four tablets between your cheeks and gums (two on each side) and let them dissolve for 30 minutes. If any tablet fragments remain after 30 minutes, you can swallow them with water.

Cramping and bleeding usually begin within 1 to 4 hours after taking misoprostol. Cramping can be strong, similar to intense menstrual cramps. Bleeding will be heavier than a normal period and you may see blood clots. Most patients pass the pregnancy within 4 to 5 hours. The provider will give you clear instructions on pain management before you leave the clinic.

The abortion pill process typically spans 2 to 3 days. Here is what to expect at each step:

Day 1 (at the clinic): You take mifepristone by mouth during your appointment. The provider performs an ultrasound, reviews your health history, and provides instructions for the next steps. This visit usually takes about an hour. You can drive yourself home and continue normal activities.

Day 2 or 3 (at home): You take misoprostol 24 to 48 hours after mifepristone. Plan to be at home for at least 4 to 6 hours after taking misoprostol. You will need access to a bathroom, a heating pad, and ibuprofen for cramping. Most patients pass the pregnancy within 4 to 5 hours.

1 to 2 weeks later: You return to the clinic for a follow-up visit to confirm the abortion is complete. This visit is included in the $380 cost. If the provider confirms everything looks normal, no further treatment is needed.

After taking misoprostol, you will experience cramping and bleeding. This is how the medication works. The cramping may feel like strong menstrual cramps, and the bleeding will be heavier than a typical period.

Most patients pass the pregnancy within 4 to 5 hours of taking misoprostol. You may see large blood clots, which is normal. The heaviest bleeding usually lasts 3 to 5 hours, then gradually decreases. Lighter bleeding or spotting may continue for 1 to 3 weeks after.

Other common side effects include nausea, vomiting, diarrhea, chills, and mild fever. These are temporary and usually resolve within 24 hours. Ibuprofen (up to 800 mg every 6 to 8 hours) is recommended for cramping. A heating pad on your lower abdomen can also help.

Contact the clinic if you soak through two or more thick pads in one hour for two or more consecutive hours, have a fever above 100.4°F lasting more than 24 hours, or experience severe pain not relieved by ibuprofen.

Using both medications together is significantly more effective than using either one alone. Studies show the two-drug combination is 93 to 98% effective, compared to about 80 to 85% for misoprostol used by itself.

Each medication plays a different role. Mifepristone stops the pregnancy from growing by blocking progesterone. Misoprostol then causes the uterus to contract and empty. By the time you take misoprostol, mifepristone has already done the work of stopping the pregnancy, so the misoprostol can complete the process more quickly and effectively.

The FDA approved this two-drug regimen in 2000, and it has been used safely by millions of patients in the United States and around the world. The combination has been studied for over 25 years and has a strong safety record.

Call The Center for Women at (708) 450-4545 to schedule your appointment. Same-day, evening, and weekend appointments are available.

The clinic is located at 10215 W. Roosevelt Rd. #101, Westchester, IL 60154. The provider will explain the entire process during your visit, including how and when to take each medication. The all-inclusive cost of $380 covers your appointment, ultrasound, both medications, and follow-up visit.