How to Get the Morning After Pill: OTC and Rx Options

Levonorgestrel emergency contraceptive pills, sold under brand names like Plan B One-Step, are available over the counter at pharmacies across the United States without a prescription or age restriction. A second, prescription-only pill called ulipristal acetate (sold as ella) works effectively over a longer window. Beyond these two pills, a copper or hormonal IUD placed by a clinician within days of unprotected sex is the most effective emergency contraceptive available. Which route makes sense for you depends on how much time has passed, your body weight, what medications you take, and what is actually available at your local pharmacy.

Buying Levonorgestrel Without a Prescription

Levonorgestrel is the active ingredient in Plan B One-Step and its generic equivalents (Take Action, My Way, Aftera, and others). Since 2013, the FDA has allowed these products to be sold over the counter to anyone, regardless of age, with no prescription or ID required.¹ You can find them at chain pharmacies, grocery-store pharmacies, and online retailers. A single 1.5 mg tablet is the standard dose, taken as soon as possible after unprotected intercourse.

In practice, “over the counter” does not always mean “grab it off the shelf.” A study of pharmacies in Colorado found that while about 87% had levonorgestrel in stock, only about 23% displayed it on open shelves where you could pick it up yourself. Roughly 42% kept it behind the pharmacy counter, and 56% asked for documentation like proof of age at the register, even though no legal age restriction exists.² A separate study in South Texas confirmed similar patterns: purchasers of levonorgestrel faced access barriers not associated with other reproductive health products, including reduced privacy and added delays.³

If the product is behind the counter or locked in a case, you can ask any pharmacy employee to retrieve it for you. You do not need to show ID, and no one needs to approve your purchase. If an employee tells you otherwise, they are giving you incorrect information, which happens more often than you might expect. One study that called pharmacies posing as customers found that staff gave wrong information about age restrictions roughly half the time.⁴ Men can also buy it; in that same study, only seven pharmacy employees incorrectly said males could not purchase Plan B, though male callers were more likely to be transferred to another person before getting an answer.

Getting Ulipristal Acetate With a Prescription

Ulipristal acetate, branded as ella, requires a prescription in the United States. It works by binding to progesterone receptors and delaying ovulation, even after the hormonal surge that normally triggers egg release has already started.⁵ This mechanism is what gives it a practical advantage over levonorgestrel: it stays effective for a full five days (120 hours) after unprotected sex, and its effectiveness does not decline much over that window.⁶ Clinical trials showed ulipristal was at least as effective as levonorgestrel overall and clearly superior when taken on days four and five.⁷

You can get a prescription through your regular doctor, an urgent care clinic, a Planned Parenthood or similar reproductive health clinic, or through telehealth services. Several online platforms now offer consultations specifically for emergency contraception and can send a prescription to your pharmacy electronically. The prescription requirement does add a step, but it also means ella is more likely to be covered by insurance, since the Affordable Care Act’s contraceptive coverage mandate generally applies to prescribed methods.

In a handful of states, pharmacists themselves can prescribe emergency contraception under statewide protocols. California, for example, allows pharmacists to prescribe both levonorgestrel and ulipristal acetate directly, bypassing the need for a separate doctor visit.⁸ Research suggests that pharmacists in these states provide more accurate counseling about emergency contraception compared to those in states without prescribing authority.⁹ Oregon, Washington, New Mexico, and several other states have similar arrangements, though the exact rules vary. If you live in one of these states and need ella quickly, calling your nearest pharmacy to ask whether they can prescribe it directly could save you hours.

Why Timing Matters and How to Choose

Every hour counts with levonorgestrel. It works best when taken within the first 24 hours and becomes less reliable as time passes. By 72 hours after unprotected sex, it still offers meaningful protection, but the pregnancy prevention rate has dropped compared to early use. Ulipristal acetate, by contrast, maintains relatively steady effectiveness across the full five-day window.

This timing difference should guide your decision. If you are within the first day or two and a levonorgestrel pill is available right now at your local pharmacy, that is a perfectly good option. If it has been more than 48 hours, or if getting to a pharmacy quickly is difficult and you expect a delay, ella becomes the stronger choice despite the prescription step. A teenager randomized to receive emergency contraception in advance used it an average of about 14 hours after unprotected intercourse, compared to roughly 25 hours for those who had to seek it out on demand.¹⁰ That gap of nearly half a day could be meaningful for levonorgestrel’s effectiveness.

When Body Weight Changes the Equation

This is one area where the evidence genuinely matters for your decision. Levonorgestrel becomes significantly less effective in people with higher body weight. A pooled analysis of WHO-sponsored studies found that women with a BMI over 30 had dramatically higher odds of pregnancy after using levonorgestrel compared to women at lower BMIs.¹¹ A separate systematic review estimated about a four-fold increase in pregnancy risk for women with obesity using levonorgestrel, and found that at weights above roughly 176 pounds (80 kg), the pregnancy rate after levonorgestrel use rose above the background rate you would expect without any contraception at all. Below about 165 pounds (75 kg), the pregnancy rate stayed under 2%.¹²

Ulipristal acetate also appears to lose some effectiveness at higher body weights, but the decline is less steep than with levonorgestrel. For people weighing over 165 pounds, ella or a copper IUD are generally the better choices. For people well over 200 pounds, an IUD is the most reliable emergency contraceptive option, because its effectiveness does not depend on body weight at all. This is a practical consideration that pharmacy labeling and counseling often fail to mention.

IUDs as Emergency Contraception

The copper IUD (ParaGard) is the gold standard for emergency contraception when effectiveness is the priority. Inserted within five days of unprotected sex, it prevents essentially all expected pregnancies. In a recent study, zero pregnancies occurred among 318 copper IUD recipients, preventing 100% of the pregnancies that would have been expected based on the timing and frequency of unprotected intercourse reported.¹³ It then continues to work as highly effective ongoing contraception for up to ten years.

What may surprise you is that hormonal IUDs containing levonorgestrel (like Mirena or Liletta) also appear to work as emergency contraception. In the same study, only one pregnancy occurred among 312 women who received a levonorgestrel 52 mg IUD, preventing roughly 94 to 96% of expected pregnancies.¹³ Another study found zero pregnancies among levonorgestrel IUD users who reported intercourse within seven days before placement.¹⁴ This is relatively new evidence that is changing clinical practice; the hormonal IUD was not traditionally recommended for emergency use, but recent data suggest it works nearly as well as copper for this purpose.

The obvious barrier with IUDs is access. You need a clinician appointment, the device itself, and a provider trained in insertion, all within five days. Same-day IUD insertion is available at some clinics and Planned Parenthood locations, but not everywhere. If you are considering an IUD for ongoing contraception anyway, seeking emergency placement can serve both purposes at once.

The Yuzpe Method as a Backup Plan

Before dedicated emergency contraceptive pills existed, doctors used specific combinations of ordinary birth control pills, known as the Yuzpe regimen, for emergency contraception. This involves taking a calculated dose of combined oral contraceptive pills containing both estrogen and a progestin. Estimates put the Yuzpe regimen’s effectiveness at preventing about 74 to 75% of expected pregnancies, with individual study estimates ranging widely from the mid-50s to nearly 90%.¹⁵¹⁶

The Yuzpe regimen is less effective than either levonorgestrel or ulipristal, and it causes substantially more nausea and vomiting because of the estrogen component.¹⁷ It is not a first choice. But it matters as a backup option because if you already have regular birth control pills at home and cannot get to a pharmacy for Plan B or ella, certain pill formulations can be used in the correct doses. The number of pills needed varies by brand. Reproductive health hotlines and websites maintain updated charts showing which brands work and how many pills to take. If you go this route, taking an anti-nausea medication like meclizine beforehand helps reduce vomiting.

Drug Interactions That Can Undermine Effectiveness

Both levonorgestrel and ulipristal acetate are broken down in the liver by the same enzyme pathway. Drugs that speed up that enzyme’s activity can reduce blood levels of either emergency contraceptive enough to compromise effectiveness. A review of drug interaction data confirmed a significant decrease in levonorgestrel exposure when co-administered with certain medications, and the levonorgestrel label was updated in 2016 to reflect this risk.¹⁸

The medications most likely to cause problems include certain drugs used for epilepsy, tuberculosis, and HIV. The herbal supplement St. John’s wort is also a known enzyme inducer that could reduce the pill’s effectiveness. If you take any of these medications regularly, a copper IUD is the most reliable emergency option, since its mechanism is unaffected by other drugs. Mention your current medications to whoever is prescribing or dispensing your emergency contraception.

What It Costs and How Insurance Fits In

Generic levonorgestrel pills typically cost between $10 and $50 at a pharmacy, depending on the brand and retailer. The branded Plan B One-Step tends to sit at the higher end. Ella generally costs $40 to $90 when purchased with a prescription, though prices vary by pharmacy. IUD insertion is significantly more expensive upfront, potentially several hundred dollars or more, but the long-term contraceptive value often makes it the most cost-effective choice over time.

Insurance coverage creates a somewhat paradoxical situation. The ACA requires most insurance plans to cover FDA-approved contraceptives without cost-sharing, but this mandate generally applies to prescribed methods. When you buy levonorgestrel over the counter without a prescription, your insurance typically will not cover it. If you get a prescription for levonorgestrel first, even though you do not technically need one, insurance is more likely to cover the cost. Research has noted that higher-income individuals use emergency contraception at higher rates, suggesting that cost is a real barrier, and that the structure of insurance coverage may inadvertently make OTC emergency contraception more expensive for some people than the prescription option.¹⁹ If money is tight, ask your provider to write a prescription for levonorgestrel so you can run it through your insurance, even though you could buy it without one.

Keeping Emergency Contraception on Hand

Given how much timing matters, having a pill at home before you need it makes practical sense. Studies on advance provision consistently show that people who already have emergency contraception on hand use it sooner after unprotected sex. Swedish teenagers who received pills in advance used them an average of about 14 hours after unprotected intercourse, compared to about 25 hours for those who had to go get them.¹⁰ A systematic review of multiple trials confirmed that people given advance supplies were two to seven times more likely to use emergency contraception when needed.²⁰

A concern sometimes raised about advance provision is whether having a pill available might lead people to use less reliable contraception in general. The evidence does not support this. The same systematic review found no difference in patterns of regular contraceptive use, pregnancy rates over 12 months, or rates of sexually transmitted infections between people who received advance supplies and those who did not.²⁰ A cost-effectiveness analysis projected that advance provision could prevent a greater percentage of unintended pregnancies compared to on-demand access, and that every dollar spent on advance pills saved more than a dollar in averted pregnancy costs.²¹

Levonorgestrel pills are shelf-stable for several years (check the expiration date on the box). Since they are available without a prescription, you can buy one now and keep it in a drawer. For ulipristal acetate, you would need a prescription, but some telehealth services offer advance prescriptions that you can fill ahead of time. Having either option ready eliminates the scramble of finding an open pharmacy or scheduling a last-minute appointment during the exact hours when speed counts most.

Side Effects and What to Expect Physically

Levonorgestrel and ulipristal acetate are both well tolerated. The most common side effects are nausea, headache, fatigue, and some irregular bleeding or spotting in the days or weeks that follow. Nausea tends to be milder with modern single-dose levonorgestrel compared to the older Yuzpe regimen. A systematic review found no significant difference in nausea between single-dose and split-dose levonorgestrel.¹⁷ If you vomit within two hours of taking either pill, the dose may not have been fully absorbed, and you should contact a pharmacist or provider about whether to take another.

One important note: ulipristal acetate and hormonal birth control pills can interfere with each other. If you take ella, you should wait at least five days before starting or restarting hormonal contraception, because the progestin in birth control pills can reduce ella’s effectiveness. Use a barrier method in the interim. Levonorgestrel does not have this interaction, so you can resume your regular birth control right away after taking it.

Neither emergency contraceptive pill will terminate an existing pregnancy. They work by delaying or preventing ovulation. If you are already pregnant when you take the pill, it will not cause harm to the pregnancy, but it also will not end it. If your period is more than a week late after taking emergency contraception, take a pregnancy test.