The abortion pill is one of the most studied medications in reproductive health, and the evidence consistently shows it is safe for the vast majority of people who use it. The FDA approved mifepristone for use through ten weeks of pregnancy, and adverse event rates adjusted for estimated use have stayed at or below 1% across all time periods tracked. To put the risk in perspective, the mortality rate for induced abortion is 0.6 deaths per 100,000 procedures, compared to 8.8 deaths per 100,000 live births.
How the Abortion Pill Works
“The abortion pill” is actually two different medications taken in sequence. The first, mifepristone, blocks progesterone, the hormone your body needs to maintain a pregnancy. Without progesterone, the uterine lining thins and the pregnancy detaches. The second medication, misoprostol, is taken 24 to 48 hours later. It causes the uterus to contract and expel the pregnancy, similar to a heavy period or early miscarriage.
Most people take mifepristone at a clinic or pharmacy and then take misoprostol at home. The process typically takes several hours, with the heaviest bleeding and cramping occurring within the first few hours after the second medication.
What the Safety Data Shows
A large-scale analysis of more than 1.6 million adverse drug event reports submitted to the FDA between 1995 and 2024 found that mifepristone had significantly fewer reported problems than most other drugs under similar regulatory oversight. Monthly adverse event reports for mifepristone averaged 14.8, compared to a median of 41.6 for comparable medications. Serious reports averaged 5.6 per month versus 14.9, and fatal reports averaged 0.2 per month versus 0.9. The vast majority of flagged reports for mifepristone were effects already identified during clinical trials, like cramping and bleeding, or cases where the medication didn’t fully work.
These numbers reflect a medication with a well-understood and predictable safety profile. No medication is without any risk, but mifepristone’s track record over nearly three decades of use is strong by any standard measure.
Common Side Effects
Cramping and bleeding are not side effects in the traditional sense. They are how the medication works. You should expect bleeding heavier than a normal period, often with clots, along with strong cramps. These are most intense in the hours after taking misoprostol and generally ease over the following days. Lighter bleeding can continue for one to two weeks.
Other common effects include nausea, vomiting, diarrhea, headache, dizziness, and mild fever or chills. These tend to be short-lived, resolving within a day or so of taking misoprostol.
Serious Complications Are Rare
The most significant risks are incomplete abortion (where some pregnancy tissue remains), heavy bleeding that requires medical attention, and infection. Incomplete abortion is the most common complication and is typically resolved with a follow-up dose of medication or a brief in-clinic procedure. It’s important to attend any scheduled follow-up appointment, because incomplete abortion left untreated is a meaningful risk factor for infection.
Hemorrhage severe enough to require a blood transfusion occurs in fewer than 1% of cases. Serious infections, including sepsis, are extremely rare. When they do occur, they require emergency medical care. Signs to watch for include soaking through two or more thick pads per hour for two hours in a row, a fever above 100.4°F lasting more than 24 hours, and foul-smelling discharge. These warrant immediate medical attention.
Who Should Not Take It
The abortion pill is not appropriate for everyone. It should not be used if you have an ectopic pregnancy (a pregnancy developing outside the uterus), because this is a life-threatening condition that requires different treatment. It is also not recommended for people with certain bleeding disorders, chronic adrenal conditions, or those taking long-term corticosteroids or blood thinners. An IUD must be removed before starting the medication. A healthcare provider will screen for these situations before prescribing.
Effect on Future Fertility
Medical abortion does not appear to affect your ability to get pregnant in the future. According to Mayo Clinic, it doesn’t raise the risk of complications in later pregnancies either. Fertility can return quickly after a medication abortion, sometimes within two weeks, so contraception is worth considering soon after if you want to avoid another pregnancy.
Mental Health Outcomes
Longitudinal research in the U.S. has found that people who obtain abortions do not experience worse mental health outcomes as a direct result. A review published in the American Journal of Psychiatry noted that those who were denied access to abortion actually showed worse initial psychological outcomes than those who received one. Relief is the most commonly reported emotion after an abortion, though it’s also normal to feel a range of emotions including sadness or grief. These feelings are not the same as a clinical mental health disorder caused by the procedure.
How It Compares to Pregnancy and Childbirth
Any conversation about safety should include context. Between 1998 and 2005 in the U.S., the mortality rate associated with live birth was roughly 15 times higher than the rate associated with induced abortion. Pregnancy and childbirth carry their own significant risks, including preeclampsia, hemorrhage, infection, and gestational diabetes. Medication abortion, by comparison, carries a very low absolute risk of serious complications and a recovery measured in days rather than weeks.