The abortion pill is a two-medication regimen that ends an early pregnancy without surgery. It is FDA-approved for use through 10 weeks of gestation (measured from the first day of your last period) and can be taken at home. The process involves two different pills, taken one to two days apart, that work together to end the pregnancy and then help your body pass the tissue.
How the Two Medications Work
The term “abortion pill” is slightly misleading because it actually involves two separate medications taken at different times. The first pill, mifepristone, blocks the hormone progesterone. Progesterone is what keeps a pregnancy attached to the uterine lining and growing. Without it, the pregnancy detaches and can no longer develop.
The second pill, misoprostol, is taken 24 to 48 hours later. This medication triggers the uterus to contract and soften the cervix, causing the body to expel the pregnancy tissue. It works by activating receptors on the smooth muscle cells of the uterus, essentially mimicking the contractions that happen during a miscarriage. Together, the two medications complete the process in a matter of hours to days.
What the Process Looks Like
On day one, you take the first pill (200 mg of mifepristone) by mouth. Some people experience light nausea or spotting after this step, but many feel nothing at all.
One to two days later, you take the second medication (800 mcg of misoprostol) by placing four small tablets between your cheek and gum and letting them dissolve. This is when the main physical experience begins. Bleeding and cramping typically start one to four hours after taking misoprostol. Over the next several hours, you can expect heavy cramping, heavy bleeding, and blood clots. The sensation is most comparable to strong period cramps, though the intensity varies widely from person to person.
The heaviest bleeding generally lasts one to two days. After that, bleeding gradually tapers off over two to three weeks, similar to a long, lightening period. Some people pass visible tissue or clots during the heaviest phase, which is a normal part of the process.
How Effective It Is
Medication abortion is highly effective in early pregnancy, with success rates above 95% when used within the approved 10-week window. A small percentage of people will need a follow-up procedure if the process is incomplete. One study of adolescent patients found a 10.7% rate of surgical intervention after medical abortion, though rates vary by gestational age, individual health factors, and the specific protocol used. The earlier in pregnancy you take the medications, the higher the likelihood that they work completely on their own.
Confirming It Worked
After taking both medications, you need to confirm the abortion is complete. This is typically done 10 to 14 days after the first pill. The World Health Organization has noted that routine clinic follow-up is not always medically necessary. Many providers now offer a low-sensitivity urine pregnancy test that you can take at home instead of returning for an ultrasound. These tests are designed to turn negative once hormone levels drop enough to confirm the pregnancy has ended. A standard home pregnancy test from a drugstore is too sensitive for this purpose and may stay positive for weeks even after a successful abortion.
If your follow-up test is positive or the result is unclear, contacting your provider is important, since it could mean the process was incomplete.
Who Should Not Use It
Medication abortion is not safe for everyone. It cannot be used for an ectopic pregnancy, which is when a fertilized egg implants outside the uterus (usually in a fallopian tube). The pills will not treat an ectopic pregnancy, and a missed ectopic can become life-threatening. This is one reason an ultrasound or clinical evaluation is part of the process before the medications are prescribed.
People with certain conditions, including chronic adrenal failure, inherited disorders that affect blood clotting (called porphyrias), or those taking long-term corticosteroids, are generally not candidates. If you have an IUD in place, it needs to be removed before starting the medication. Allergies to either mifepristone or misoprostol also rule out this option.
Side Effects and Risks
The expected side effects of medication abortion, heavy bleeding and strong cramping, are a necessary part of how the process works, not a sign that something is wrong. Other common side effects include nausea, vomiting, diarrhea, chills, and fatigue. These usually resolve within a day of taking misoprostol.
Serious complications are uncommon but possible. These include very heavy bleeding (soaking through two or more thick pads per hour for two or more consecutive hours), infection, or an incomplete abortion where tissue remains in the uterus. Signs to watch for include a fever lasting more than 24 hours, foul-smelling discharge, or worsening pain days after the procedure. Any of these warrants prompt medical attention.
Effect on Future Fertility
Medication abortion does not appear to affect your ability to get pregnant in the future. According to Mayo Clinic, it does not raise the risk of complications in later pregnancies. Ovulation can return as soon as two weeks after a medication abortion, meaning pregnancy is possible again almost immediately.