Plan B is available over the counter at most pharmacies, drugstores, and many grocery stores in the United States. No prescription, no ID, and no age restriction is required. You can walk in, pick it up off the shelf or ask the pharmacist, and pay at the register like any other product. The sooner you take it after unprotected sex, the better it works, so knowing your options ahead of time matters.
Where to Buy Plan B
The most common places to find Plan B or its generics are chain pharmacies like CVS, Walgreens, and Rite Aid. Target, Walmart, and many grocery stores with pharmacy sections also carry it. In some stores it’s on the shelf in the family planning aisle near condoms and pregnancy tests. In others, it’s kept behind the pharmacy counter, but you still don’t need a prescription to buy it.
If you’d rather not go to a store, several online retailers sell generic versions with standard or expedited shipping. Prices online tend to be lower, with generics starting around $25 including shipping. The tradeoff is waiting for delivery, which works against the time-sensitive nature of the pill. If you’re ordering online as a “just in case” purchase to keep on hand, that’s a practical workaround.
Planned Parenthood health centers also carry emergency contraception. Most locations let you pick it up during normal business hours without an appointment. Community health clinics and college health centers are other options, and some may offer it at a reduced cost or for free depending on your income.
What It Costs
Brand-name Plan B One-Step typically runs $40 to $50 at retail pharmacies. Generic versions contain the same active ingredient at the same dose and cost less, often in the $25 to $40 range. The cheapest generics, particularly online, hover around $25.
If you have health insurance, you can potentially get emergency contraception at no cost. Under the Affordable Care Act, marketplace insurance plans must cover FDA-approved contraceptive methods, including emergency contraception like Plan B, without a copay or coinsurance when prescribed by a provider and obtained through an in-network pharmacy. The catch is that you’ll typically need a prescription to trigger that insurance coverage, even though you don’t need one to buy it. If time is critical, paying out of pocket and skipping the prescription step may be worth it.
No Age Limit, No ID Required
The FDA approved Plan B One-Step for nonprescription use without age restrictions in 2013. The same rule applies to all its generic equivalents. A cashier or pharmacist cannot legally require you to show ID or prove your age to purchase it. If you’re a teenager or buying it for someone else, you have the same access as any adult. Some stores may still shelve it behind the counter, which can feel like a barrier, but asking the pharmacist is all it takes.
How Plan B Works
Plan B contains a synthetic hormone that primarily works by delaying or preventing ovulation. If your body hasn’t released an egg yet, the pill keeps that from happening so there’s nothing for sperm to fertilize. It does not end an existing pregnancy. If a fertilized egg has already implanted in the uterus, Plan B will not affect it.
This is why timing matters so much. The pill is most effective when taken as soon as possible after unprotected sex. It can be taken up to 120 hours (five days) afterward, but effectiveness drops with each passing day. Studies show pregnancy rates of roughly 1% to 2% when the pill is taken within the recommended window, but those numbers are best when you act within the first 24 hours.
Weight Can Affect How Well It Works
One important detail that isn’t always on the box: Plan B becomes less effective at higher body weights. Clinical guidelines from the Faculty of Sexual and Reproductive Healthcare indicate that effectiveness drops noticeably for people with a BMI over 26 or a body weight over about 155 pounds (70 kg).
If that applies to you, a different type of emergency contraception pill called ella may be a better option. Ella requires a prescription but remains more effective across a wider weight range. A copper IUD, inserted by a healthcare provider within five days, is the most effective form of emergency contraception regardless of weight and doubles as long-term birth control. Both options require a visit to a clinic or provider, so calling a Planned Parenthood or your doctor’s office quickly is the best first step.
What to Expect After Taking It
Plan B is a single pill taken by mouth. Common side effects include nausea, headache, fatigue, and lower abdominal pain. Some people experience spotting or changes to their next period. Your period might come a few days early or late, and the flow may be heavier or lighter than usual. These effects are temporary.
If your period is more than a week late after taking Plan B, take a pregnancy test. The pill reduces your chance of pregnancy significantly but is not 100% effective, and a late period is the clearest signal to follow up. Plan B is also not meant to replace regular contraception. Taking it repeatedly won’t cause long-term harm, but it’s less effective than consistent use of other birth control methods and costs more over time.
Keeping One on Hand
Because Plan B works best the sooner you take it, some people buy a dose in advance to keep at home. The pill has a shelf life of several years when stored at room temperature. Having it available eliminates the delay of a late-night pharmacy run or weekend clinic closure. Generics purchased online for around $25 make this a relatively low-cost form of preparedness.