Ulipristal
Ella is a prescription emergency contraception medication containing ulipristal acetate. It is used to prevent pregnancy after unprotected sex or contraceptive failure, such as a broken condom or missed birth control pills. It is the only FDA-approved emergency contraceptive that remains effective for up to 5 days (120 hours) after intercourse.
Ella is a prescription emergency contraception pill that can be taken within 5 days of unprotected sex to help prevent unintended pregnancy.
Key facts at a glance
- RxNorm
- 1005925
- Generic
- Ella
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Emergency contraception to prevent pregnancy after unprotected intercourse or contraceptive failure (e.g., broken condom, missed birth control doses). It is not intended for routine contraception and will not terminate an existing pregnancy.
Ella is a selective progesterone receptor modulator (SPRM) that works primarily by inhibiting or delaying ovulation. It may also alter the uterine lining to potentially interfere with implantation, though this mechanism is not fully established.
Must be taken within 120 hours (5 days) of unprotected sex for maximum effectiveness. Available by prescription only. Common side effects may include headache, abdominal pain, nausea, and menstrual changes. Should not be used during confirmed or suspected pregnancy. Effectiveness may be reduced in patients with a BMI above 35. Does not protect against sexually transmitted infections.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed July 26, 2026. · Read our editorial policy