Ella (ulipristal) is a prescription emergency contraceptive medication, sometimes called the "morning after pill." It's used to prevent pregnancy after unprotected sex or if your birth control fails, like a missed pill or broken condom. Ella (ulipristal) works best when you take the tablet as soon as possible, within 5 days after unprotected sex. It isn't regular birth control and won't stop a pregnancy that's already started. Common side effects include headache, nausea, and stomach pain.
Ella (ulipristal) is a progestin agonist / antagonist. This means it can both block and act like the natural hormone progesterone in your body. The medication mainly works by delaying or preventing ovulation, which keeps an egg from being released so fertilization doesn’t happen. It might also thin the lining of the uterus, making it harder for a fertilized egg to implant.
Source: DailyMed
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Less common
Dizziness
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
Single pill that's taken as a one-time dose
Works up to 5 days after unprotected sex
Most effective emergency contraception pill available
Most side effects are mild
Requires a prescription
Won't end a pregnancy that's already started
Can interact with some hormonal birth control pills
Might not work as well for those with a larger body size
You can take Ella (ulipristal) with or without food at any time.
You must take Ella (ulipristal) within 5 days after unprotected sex. The sooner you take it, the better it works to prevent pregnancy.
If you vomit within 3 hours of taking Ella (ulipristal), call your prescriber right away. You might need to take another dose for it to work.
Don't take Ella (ulipristal) more than once during the same menstrual cycle. It isn’t known if taking it more often is safe.
After taking Ella (ulipristal), use a reliable barrier method like condoms until your next period. This will help continue to prevent pregnancy.
Don’t take hormonal birth control within 5 days of taking Ella (ulipristal). Doing so can make the medication work less well.
After Ella (ulipristal), your next period might come a few days early or late. If it’s more than 7 days late, take a home pregnancy test to check if you're pregnant.
Ella (ulipristal) doesn't protect you from HIV or other sexually transmitted infections (STIs). You’ll still need protection like condoms to reduce this risk.
Ella (ulipristal) can cause some serious health issues. This risk may be even higher for certain groups. If this worries you, talk to your doctor or pharmacist about other options.
Ella (ulipristal) only works to prevent pregnancy after unprotected sex. It won't work if you're already pregnant. If you are considering ending a pregnancy, talk with your OB-GYN provider since Ella (ulipristal) isn't a safe or effective option for that.
An ectopic pregnancy happens when a fertilized egg grows outside your uterus. This can be life-threatening and sometimes need to be treated with surgery. Ella (ulipristal) doesn't cause an ectopic pregnancy, but it's still possible to have one after taking it. If you experience unexplained or severe pelvic pain along with unusual vaginal bleeding after taking Ella (ulipristal), let your OB-GYN provider know.
It isn't known if Ella (ulipristal) is safe to take more than once in the same menstrual cycle. Don't use it as your regular birth control. If you need birth control, your OB-GYN provider can help you pick one that works best for you. After taking Ella (ulipristal), make sure to use a barrier method like condoms your next period.
After you take Ella (ulipristal), you can get pregnant again once the medication wears off after a few days. To be safe, use a reliable barrier method like condoms until your next period. If you want to start hormonal birth control, wait at least 5 days after taking Ella (ulipristal), and keep using condoms until your next period.
After you take Ella (ulipristal), your period might come a few days earlier or later than usual. In studies, periods were delayed by about 2.5 days on average but went back to normal the next month. If your period is late by more than a week, take a home pregnancy test to rule out pregnancy.
Ella (ulipristal) doesn't protect against HIV or other sexually transmitted infections (STIs). You’ll still need to use condoms or other barrier methods to lower your risk of getting or spreading an STI.
| Dosage | Quantity | Price as low as | Price per unit | 
|---|---|---|---|
| 30mg | 1 tablet | $42.84 | $42.84 | 
The typical dose is to take 30 mg (one tablet) by mouth as soon as possible within 5 days of unprotected sex.
Using this medicine with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.
Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
Use while already pregnant
Emergency contraception
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HRA PHARMA AMERICA, INC. (2025). ELLA- ulipristal acetate tablet [package insert]. DailyMed.
Moreau, C., et al. (2012). Results from pooled Phase III studies of ulipristal acetate for emergency contraception. Contraception.
Planned Parenthood. (n.d.). What’s the ella morning-after pill?
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