Medication abortion, often called the abortion pill, is a common method used to end an early pregnancy with medicines rather than a procedure. The standard medication abortion regimen commonly involves mifepristone and misoprostol. In the United States, the FDA-approved mifepristone regimen is for medical termination of pregnancy through 10 weeks, or 70 days, of gestation.
Most people who use abortion pills experience expected symptoms such as cramping, bleeding, nausea, diarrhea, chills, tiredness, or a mild fever. These symptoms can feel intense, especially after misoprostol, because the uterus contracts and empties. However, some symptoms may signal a serious complication and should not be ignored. Understanding abortion pill side effects can help someone know what is normal, what needs a call to a healthcare provider, and what requires emergency medical help.
This article explains common side effects, warning signs, and when to seek urgent care.
What Are the Most Common Abortion Pill Side Effects?
The most common abortion pill side effects are related to the way the medication works. Mifepristone helps stop the pregnancy from continuing, while misoprostol causes the uterus to contract and expel pregnancy tissue. Because of this process, bleeding and cramping are expected. ACOG describes medication abortion as a safe and effective method, and Planned Parenthood notes that serious problems are rare, though medical support is important when warning signs appear.
Common side effects may include:
- Vaginal bleeding
- Blood clots
- Cramping or abdominal pain
- Nausea
- Vomiting
- Diarrhea
- Chills or shivering
- Mild fever
- Headache
- Dizziness
- Fatigue
For many people, the heaviest bleeding and strongest cramping happen within several hours after taking misoprostol. Bleeding may then become lighter over the next few days, though spotting or light bleeding can continue for longer. Cleveland Clinic notes that bleeding can be heavier for one to two days and may lessen over two to three weeks.
Bleeding After the Abortion Pill: What Is Normal?
Bleeding is one of the most expected abortion pill side effects. It may be heavier than a regular period, especially when the pregnancy tissue is passing. Clots can also occur. Some cramping and bleeding usually mean the medicine is working.
Normal bleeding may include:
- Bleeding heavier than a period for a short time
- Passing small or medium-sized clots
- Cramping that comes and goes
- Bleeding that becomes lighter after the heaviest phase
- Spotting for days or weeks afterward
However, bleeding should not be so heavy that it causes weakness, fainting, or soaking through pads continuously. Heavy bleeding that does not slow down can become dangerous.
When Heavy Bleeding Needs Emergency Help
Seek emergency medical help right away if bleeding is extremely heavy or you feel faint, weak, or unable to stand. Planned Parenthood advises calling a doctor or nurse if someone feels very sick, has heavy bleeding, or has symptoms that could suggest infection. Cleveland Clinic lists severe bleeding, such as soaking more than two thick pads within an hour, as a reason to contact a provider.
Emergency warning signs may include:
- Soaking through two or more large pads per hour for two hours
- Passing very large clots repeatedly
- Feeling dizzy, faint, confused, or extremely weak
- Pale, cold, or clammy skin
- Rapid heartbeat
- Bleeding that suddenly becomes much heavier after it had slowed
Heavy bleeding can sometimes mean incomplete abortion, retained tissue, or another complication. Do not wait for symptoms to “settle” if the bleeding feels extreme or you feel physically unwell.
Cramping and Pain: What Is Expected?
Cramping is another common abortion pill side effect. Misoprostol causes the uterus to contract, so cramps can be stronger than menstrual cramps. Pain may come in waves and may be most intense when bleeding is heaviest.
Expected pain may include:
- Lower abdominal cramping
- Back pain
- Pelvic pressure
- Pain that improves after pregnancy tissue passes
- Cramping that responds to provider-approved pain medicine
But pain should not be unbearable, one-sided, or worsening over time. Severe pain may indicate a complication, especially if it comes with fever, dizziness, shoulder pain, or very heavy bleeding.
When Pain May Be an Emergency
Get urgent medical care if pain is severe, persistent, or unusual. One-sided lower abdominal pain, shoulder pain, fainting, or dizziness can be warning signs of ectopic pregnancy, which is a pregnancy outside the uterus and cannot be treated with abortion pills. Cleveland Clinic notes that medical abortion is not a safe option for ectopic pregnancy.
Seek emergency help for:
- Severe abdominal pain that does not improve
- Pain mainly on one side
- Shoulder-tip pain
- Fainting or feeling like you may pass out
- Pain with heavy bleeding
- Pain with fever or foul-smelling discharge
Even if someone has taken abortion pills, an ectopic pregnancy can still be dangerous and needs immediate medical treatment.
Fever, Chills, and Infection Warning Signs
Mild fever or chills can happen after misoprostol. This may be temporary and can occur as the body responds to the medication. However, fever that lasts too long or appears with other symptoms may suggest infection.
Planned Parenthood warns that nausea, vomiting, diarrhea, belly pain, or fever lasting more than 24 hours after taking misoprostol can be a sign of infection and should be discussed with a doctor or nurse right away. MedlinePlus also advises getting emergency medical treatment for general symptoms of illness such as weakness, nausea, vomiting, diarrhea, or fever after mifepristone when serious symptoms occur.
Call a provider urgently or seek emergency help if you have:
- Fever lasting more than 24 hours
- Fever that starts after the first day and gets worse
- Chills that do not improve
- Foul-smelling vaginal discharge
- Severe belly pain with fever
- Weakness, vomiting, or diarrhea that continues
- Feeling seriously ill or “not right”
Infection after medication abortion is rare, but it can become serious if untreated.
Nausea, Vomiting, Diarrhea, and Digestive Symptoms
Digestive symptoms are also common abortion pill side effects, especially after misoprostol. Nausea, vomiting, diarrhea, and stomach discomfort may happen because misoprostol affects smooth muscle and the digestive system.
These symptoms are usually not dangerous when they are mild and short-lived. However, they need medical attention if they continue, become severe, or are paired with fever, weakness, or dehydration.
Contact a healthcare provider if:
- Vomiting prevents you from keeping fluids down
- Diarrhea is severe or lasts more than 24 hours
- You feel weak, dizzy, or dehydrated
- Digestive symptoms come with fever or worsening pain
- You feel increasingly sick instead of better
Most people should begin feeling better the day after the abortion process, not worse. Planned Parenthood specifically notes that feeling sick with nausea, vomiting, diarrhea, belly pain, or fever for more than 24 hours after misoprostol may be a sign of infection.
No Bleeding After Misoprostol: Is It a Problem?
Some bleeding is usually expected after misoprostol. If there is no bleeding at all within 24 hours after taking misoprostol, it may mean the medication did not work or that follow-up care is needed. Cleveland Clinic lists no bleeding 24 hours after misoprostol as a reason to contact a healthcare provider.
No bleeding does not always mean an emergency, but it should be taken seriously. A provider may recommend evaluation, repeat testing, ultrasound, or other next steps depending on the situation.
Signs the Abortion May Be Incomplete
An incomplete abortion means some pregnancy tissue remains in the uterus. This can cause continued bleeding, pain, infection, or ongoing pregnancy symptoms. The WHO advises that people should be informed about symptoms such as prolonged heavy bleeding, fever, or signs of ongoing pregnancy and when to return for follow-up care.
Possible signs of incomplete abortion include:
- Heavy bleeding that continues
- Severe cramps that do not improve
- Fever or foul-smelling discharge
- Pregnancy symptoms that continue
- No period within the expected timeframe
- A positive pregnancy test weeks later
Follow-up care is important if symptoms suggest the abortion may not be complete.
Allergic Reaction: Rare but Serious
A severe allergic reaction to abortion pills is uncommon, but it can be life-threatening. Seek emergency medical help immediately if symptoms of an allergic reaction appear.
Emergency allergy symptoms include:
- Trouble breathing
- Swelling of the lips, tongue, face, or throat
- Hives or severe rash
- Chest tightness
- Sudden dizziness or fainting
Do not wait to see whether these symptoms improve. Call emergency services or go to the nearest emergency department.
Who Should Be Extra Careful?
Some people may have a higher risk of complications or may not be good candidates for medication abortion. Cleveland Clinic states that medical abortion may not be safe for people with ectopic pregnancy, certain bleeding disorders, significant anemia, chronic adrenal failure, long-term corticosteroid use, allergy to the medicines, or lack of access to emergency care.
Extra caution is important if someone:
- Has a bleeding disorder
- Has severe anemia
- Uses blood thinners
- Has an IUD that has not been removed
- Might have an ectopic pregnancy
- Is farther along in pregnancy than recommended
- Has no access to emergency medical care
- Has severe ongoing illness after taking the pills
A healthcare provider can help assess risks before or after medication use.
When to Seek Emergency Medical Help: Quick Checklist
Get emergency medical help right away if you experience:
- Very heavy bleeding
- Soaking two or more pads per hour for two hours
- Fainting, confusion, or severe weakness
- Severe abdominal pain
- One-sided pelvic pain
- Shoulder pain with dizziness or fainting
- Fever lasting more than 24 hours
- Foul-smelling discharge
- Trouble breathing or facial/throat swelling
- Feeling seriously ill after the first day
These symptoms may be rare, but they can signal bleeding, infection, allergic reaction, ectopic pregnancy, or incomplete abortion.
Final Thoughts
Most abortion pill side effects are expected and temporary. Bleeding, cramping, nausea, diarrhea, chills, and fatigue are common parts of the process for many people. However, symptoms such as extreme bleeding, severe pain, fever lasting more than 24 hours, fainting, foul-smelling discharge, or signs of allergic reaction should be treated as urgent.
Medication abortion is considered safe and effective when used appropriately, but no one should ignore warning signs. If symptoms feel severe, unusual, or frightening, it is always safer to contact a healthcare provider or seek emergency medical help.
