What ulipristal is, in plain English
Ulipristal, sold in the United States under the brand name Ella, is a prescription emergency contraceptive pill. One tablet taken after unprotected sex, or after a birth control method fails, can lower the chance of pregnancy for up to five days. It is not routine contraception, and it does not end an existing pregnancy.
The product is an oral tablet. Under US labeling it is classed as a progesterone agonist and antagonist, which is a fancy way of saying it acts on the same receptor as the hormone progesterone, sometimes switching it on and sometimes blocking it. That single mechanism is what lets it push back the timing of ovulation.
People usually look this drug up in a hurry. A condom broke. Two or three birth control pills were missed. A contraceptive injection ran late. Sex happened without any method. In each of those situations the question is the same: what can be done now, how fast, and what does it cost. This page answers those questions in plain language and stays inside what official labeling and major medical bodies actually say.
Emergency contraception sits alongside a much longer list of ongoing options, and it is worth knowing where each one fits. You can Browse Medication Guides for other treatments covered on this site.
How the pill works and why the clock matters
Ulipristal acetate is a selective progesterone receptor modulator. In practice, it interferes with the hormone surge that releases an egg. Published reviews describe it as able to delay ovulation even after that surge has started to climb, which is the main pharmacological difference from older emergency contraceptive pills. A detailed summary of the evidence sits in a peer-reviewed review of emergency contraception published through the NIH.
Delaying ovulation only helps if the egg has not already been released. If ovulation has passed, or if a pregnancy is already established, the pill has no effect on it. That is why timing dominates every piece of guidance about this medicine: sooner is better, every day, and no emergency method works every time.
US labeling supports use as soon as possible and within 120 hours, meaning five days, of unprotected intercourse. The standard single dose is one 30 mg tablet. Do not treat that as personal instruction; the exact timing and whether this method suits you belong in a conversation with a clinician or pharmacist.
If you are not sure where you sit in your cycle, a rough estimate can make that conversation faster and more specific.
Ovulation window
The likely fertile window from your cycle, useful whether you are trying to conceive or timing a birth control switch.
Calendar estimate only. Cycles vary month to month, and this is not a contraceptive method. Ask a clinician before stopping any birth control.
Treat any cycle estimate as a ballpark. Cycles shift with stress, illness, travel and recent hormonal contraception, and no calculator can confirm whether ovulation has already happened.
What the FDA label approves, and what this drug will not do
The approved US indication is narrow and specific: preventing pregnancy after unprotected intercourse or a known or suspected contraceptive failure. The label also states plainly that the product is not intended for routine use as a contraceptive. You can look up current approval records through the FDA Drugs@FDA database of approved products.
Three limits matter enough to say directly. First, the label states the drug is not indicated for terminating an existing pregnancy; it is an emergency contraceptive, not an abortion medication, and the two work in completely different ways. Second, it offers no protection against HIV or other sexually transmitted infections, so testing may still be worth discussing. Third, it is a one-off backup, not a plan. Ongoing methods are more effective and cheaper per year than repeat emergency doses.
Searchers sometimes find references to ulipristal for uterine fibroids. Higher-dose products for fibroids have been marketed outside the United States, but that is not an FDA-approved use here, and liver safety concerns led regulators abroad to restrict those products. In the US, emergency contraception is the approved indication, and any other use is outside the label.
Ulipristal versus levonorgestrel and the copper IUD
No, this is not the same thing as Plan B. Plan B and its many store-brand equivalents contain levonorgestrel, a progestin. Ulipristal acetate is a different molecule with a different mechanism, a different prescription status, and a different effective window. Family medicine guidance summarised in an American Academy of Family Physicians review of this emergency contraceptive describes it as at least as effective as levonorgestrel when taken within 72 hours, with efficacy maintained across the full five-day window.
Emergency Contraception Options at a Glance
| Ulipristal (Ella) | Levonorgestrel (Plan B) | |
|---|---|---|
| US Status | Prescription only | Over the counter, no age limit |
| Timing Window | Up to 5 days (120 hrs) | Labeled up to 3 days |
| Mechanism | Progesterone receptor modulator | Progestin |
| Can stack together? | No, progestin blunts effect | No, blunts ulipristal |
| Option | What it is | US status | Timing window |
|---|---|---|---|
| Ulipristal acetate (Ella) | Progesterone receptor modulator, single oral tablet | Prescription only | Up to 5 days after sex |
| Levonorgestrel (Plan B and generics) | Progestin tablet | Available over the counter, no age limit | Labeled for up to 3 days; effectiveness declines with delay |
| Copper IUD | Device placed in the uterus by a clinician | Prescription and in-person placement | Up to 5 days after sex |
The copper IUD is described by major obstetric and gynecologic guidance as the most effective form of emergency contraception, and it doubles as long-term birth control once placed. Its drawback is access: it needs a clinic appointment, quickly. Patient-facing background is available in the ACOG patient FAQ on emergency contraception.
One practical warning: do not stack the two pill types. Taking levonorgestrel and ulipristal in the same cycle is not recommended, because the progestin can blunt the effect of the receptor modulator. If you have already taken one, say so before taking anything else.
Side effects people report most often
Most side effects reported in trials were mild and short-lived. Headache, nausea, abdominal or stomach pain, painful periods, tiredness and dizziness show up most frequently. A consumer-level summary of these effects appears in the Mayo Clinic entry for this oral medication.
Cycle changes are common and expected. The label notes the medicine may alter the next expected period. It may come earlier or later than usual, and it may be heavier, lighter or accompanied by spotting. That unpredictability is not a sign the drug failed; it is part of how it works.
The one timing rule worth remembering: if your period is more than a week late, take a pregnancy test. That is directly what the labeling advises, because a delayed period is the main early signal that emergency contraception did not prevent pregnancy.
Serious reactions are uncommon, but two deserve attention. Severe lower abdominal pain in the weeks after taking the dose should be evaluated for ectopic pregnancy, where a pregnancy grows outside the uterus and becomes a medical emergency; the label specifically instructs clinicians to check for it. Signs of an allergic reaction, including swelling of the face or throat, rash or trouble breathing, need emergency care.
Warnings, interactions and who needs a closer look first
Interactions matter more here than with most single-dose medicines, because there is no second chance to adjust. Drugs that speed up liver enzyme CYP3A4 can lower blood levels of this emergency contraceptive and may reduce how well it works. That group includes rifampin, the herbal supplement St John’s wort, several seizure medicines such as carbamazepine and phenytoin, and some HIV medications. Disclose every prescription, over-the-counter product and supplement, not just the ones that feel relevant.
Hormonal birth control interacts in both directions. Progestin can reduce the effect of ulipristal, and the emergency dose can also blunt the start of a new hormonal method. Public health guidance advises waiting five days after the emergency dose before starting or restarting hormonal contraception, and using condoms or another barrier method until the next period arrives. Federal contraceptive recommendations are collected at the CDC contraception guidance hub for clinicians and patients.
Two more label points are worth knowing. Fertility returns quickly, so later acts of intercourse in the same cycle are not protected by the dose you already took. And repeated use within a single cycle is not what the product was studied for; it is designed as a one-time backup.
If you are breastfeeding, ask before taking it. US labeling advises against breastfeeding for 24 hours after the dose. If you are pregnant or think you might already be pregnant, this is not the right medicine, and a test comes first. Tell your clinician about liver disease, a previous ectopic pregnancy, severe asthma treated with steroids, or any unexplained vaginal bleeding.
Body weight has been studied and the picture is incomplete. Some analyses suggest oral emergency contraceptives may work less well at higher body weights, with the evidence stronger for levonorgestrel than for this drug. The honest summary is that data are limited, and that a copper IUD is not affected by weight. Raise it if it applies to you rather than guessing.
Vomiting shortly after swallowing the tablet can mean the dose was not absorbed. Guidance generally suggests contacting a clinician or pharmacist if vomiting happens within a few hours, rather than assuming the dose counted.
Brand names, generic tablets and why it stays prescription-only
In the United States the best known brand is Ella, marketed by PMI Branded Pharmaceuticals. The active ingredient is ulipristal acetate, and it is dispensed as a single oral tablet. Other trade names appear in clinical drug references, and generic versions of the tablet exist in some markets; what your pharmacy stocks may differ from what a website pictures.
The prescription status trips people up. Levonorgestrel emergency contraception is sold over the counter in the US with no age restriction, sitting on the shelf next to pregnancy tests. Ulipristal acetate is not. It requires a prescription, which is why the search for it so often turns into a search for a clinician who can write one today. General patient background on contraceptive options is maintained at the MedlinePlus overview of birth control from the National Library of Medicine.
A prescription is only half the problem. Stocking is the other half. Not every pharmacy keeps this tablet on the shelf, and a five-day window leaves no room for a two-day special order. Calling ahead to confirm stock, before the prescription is sent anywhere, saves the most time of anything on this page.
What ulipristal costs without insurance, and what moves that number
Self-pay cost splits into two separate charges: the medicine itself, and whatever the consultation costs. Where telehealth programs in our directory publish a self-pay figure for this medicine, the lowest tracked price recorded is . Advertised prices change often, so treat any figure as a snapshot rather than a fixed rate.
Four things move the total. Brand versus generic tablet is the first. The dispensing pharmacy is the second, since cash prices for the same tablet vary widely between chains, independents and mail-order services. The third is whether a telehealth program charges a separate consultation fee or folds it into one price. The fourth is shipping: expedited delivery costs more, and with a five-day window, standard shipping may be no help at all.
On insurance, the honest framing is verify, never assume. Federal rules require most plans to cover FDA-approved prescription contraception without cost sharing, and prescribed emergency contraception is generally included, but plan design, grandfathered status, religious exemptions and pharmacy network rules all create exceptions. Policy analysis of these coverage rules is tracked by the KFF program on women’s health policy and coverage. Call the number on your card, or ask the pharmacy to run it, before you pay cash.
If you want to see how self-pay figures are laid out across programs before you commit, the Sample Savings Report shows the format, and the way provider ratings are constructed is set out on our Scoring Methodology page.
Getting a prescription online and what differs between programs
Telemedicine is a realistic route here, because the assessment is short and the medicine is a single dose. Prescribing rules are set state by state, so a program can only treat you if it holds a license where you are physically located at the time. Some services run an asynchronous questionnaire reviewed by a clinician; others require a live video or phone visit.
Fulfillment is where programs really diverge, and it is the part that decides whether the prescription arrives in time. Some send the prescription to a pharmacy near you for same-day pickup. Others ship from a mail pharmacy, which can be cheaper and slower. Ask which model applies before paying, not after.
Some clinicians will also discuss advance provision, meaning a prescription filled and kept at home before it is needed. That removes the scramble entirely, and it is a reasonable question to raise during any routine contraception visit.
Worth comparing between programs:
What to Ask Before Choosing a Telehealth Program
- Is the consultation fee separate from the medication charge?
- Can they send to a local pharmacy for same-day pickup, or is it ship-only?
- Which states are their clinicians licensed in?
- Can they bill your insurance, or is it cash pay only?
- What happens, and what does it cost, if the prescription is declined?
- Whether the consultation fee is separate from the medication charge
- Whether they can send to a local pharmacy or only ship
- Which states the clinicians are licensed in
- What happens, and what it costs, if the prescription is declined
- Whether they can bill insurance or are cash pay only
You can compare programs and patient ratings in the Telehealth Provider Directory, read our Independent Editorial Coverage of how these services operate, or use the Free Health Calculators for the numbers that come up in these conversations.
Questions worth asking, and when to seek urgent care
Bring a short list. A few minutes of specific questions gets better answers than a general one about whether the pill is safe.
- Given when I had sex, is this the right option, or would a copper IUD be more effective for me?
- Do any of my current medicines or supplements reduce how well it works?
- When can I start or restart my regular birth control, and what should I use until then?
- What should I expect from my next period, and when should I test?
- Is a generic tablet available, and can you send it to a pharmacy that has it in stock?
- If I am breastfeeding, what do you recommend about timing?
Seek medical care promptly for severe or one-sided lower abdominal pain in the weeks after taking the dose, especially with dizziness, fainting or shoulder pain, since those can signal an ectopic pregnancy. Get emergency help for swelling of the face, lips or throat, hives with breathing difficulty, or very heavy bleeding that soaks through protection quickly. Take a pregnancy test if your period is more than a week late, and follow up if the result is positive or if bleeding stays unusual for more than one cycle.
Authoritative sources
- Approved US product records and current labeling: FDA Drugs@FDA
- Contraceptive recommendations and timing guidance: CDC contraception resources
- Patient guidance on emergency options: ACOG emergency contraception FAQ
Educational content, not medical advice. Always consult a qualified clinician before starting, stopping or switching treatment.
