There is no known dangerous overdose of Plan B at the doses involved. If you have taken two pills, or a second dose, you are very likely fine. The main thing extra hormone does is increase side effects like nausea, without making the pill any more effective, because the standard single dose is already the studied effective amount. The one situation worth flagging is that if you vomited within about two hours of taking it, you may genuinely need to repeat the dose, which is not the same as overdosing. This guide explains what too much actually does, the different ways people end up taking it twice, whether you can crush it, and when to seek help.
The short answer
If you are worried because you took more Plan B than you meant to, the reassuring news is that there is no known dangerous overdose of levonorgestrel at these doses. The drug’s own manufacturer notes that there are no data on overdose, with the main expected effect simply being nausea and possibly some vomiting. Taking two pills, or a second dose, is not going to seriously harm you.
The catch is that more does not mean better. The standard single dose is already the amount that has been studied and shown to work, so extra hormone does not increase your protection against pregnancy in any way; it only raises your chances of feeling unwell afterward. There is, though, one legitimate reason to repeat a dose: if you vomited within about two hours of taking the pill, you may need another, because the first may not have been absorbed. That is a sensible and recommended repeat, not an overdose at all.
This article is about acute dosing — taking too much at once, a second dose, or crushing a pill. For the separate question of whether using emergency contraception repeatedly over time affects fertility, see taking Plan B too many times. The emergency contraception calculator can help with timing.
So the headline is that taking too much is not dangerous, it does not boost effectiveness, and the only worthwhile repeat is after vomiting. The rest of this guide walks through the specific situations people find themselves in and what to do in each.
It is worth saying directly, because so many people arrive at this question in a state of quiet panic, that an extra pill is not the kind of mistake that causes lasting harm. Plan B is a single hormone in a modest amount, not a toxic substance, and your body simply processes the extra and moves on. If you took two and have been bracing for something to go wrong, you can let that fear go and focus on the practical details instead.
What taking too much does
To understand why extra pills are pointless rather than helpful, it helps to see what an additional dose actually changes, and what it does not.
Effectiveness at preventing pregnancy
An extra pill does not add protection. The standard single dose is already the studied effective amount, so doubling it gains you nothing.
Side effects like nausea and vomiting
More hormone means a higher chance of feeling nauseous, queasy, tired, or dizzy, and possibly some irregular bleeding, all with no upside.
That is the whole trade-off in a nutshell. The active ingredient works by delaying ovulation, and a single dose is entirely enough to do that; piling on more hormone does not somehow delay ovulation any harder or for longer. What it does do is give your body more of a hormonal jolt to react to, which is why the most common consequence of taking too much is feeling more nauseated. Serious or life-threatening overdose from levonorgestrel is extremely rare, so while you may feel unwell, you are not in danger from an extra pill or two. The hormone in Plan B is the same kind found in many ordinary birth control pills, just in a larger single dose, and accidentally taking a couple of those is well understood not to be hazardous. That track record is part of why the manufacturer and health bodies treat an accidental extra dose as a matter of side effects rather than safety.
So if you took more than the single dose, expect possibly stronger side effects rather than better protection. Those effects, and how long they last, are covered in our side effects guide. The Waldev calculator can help with the timing of your actual dose.
Why people end up taking too much
Taking more Plan B than intended is a common situation, and the reasons behind it are usually understandable rather than careless. Naming them helps put the worry in perspective.
The instinct that more is safer
The most common reason is simple anxiety. When the stakes feel high, the instinct to double up, on the logic that more must mean better protection, is very human. It is the same impulse that makes people take an extra painkiller hoping for faster relief. With Plan B, though, that instinct does not pay off, because one dose is already the full effective amount, so the extra pill adds side effects rather than safety.
Confusion, vomiting, and mixed messages
Other reasons are about confusion. Some people still picture emergency contraception as a two-pill product, a holdover from an older regimen we will come to shortly. Others take a pill, feel queasy, and take another to be sure it counted. A few misread the instructions, find two tablets and assume both are meant to be taken together, or act on well-meaning but mistaken advice from a friend or partner. None of these is a disaster.
So if any of these describe how you ended up taking extra, you are not in trouble, and the worst likely outcome is feeling more nauseated for a day. Understanding why it happened can also help you avoid it next time. The emergency contraception calculator can help you plan the timing of a single dose.
The point of walking through these reasons is reassurance as much as anything. People rarely take too much out of recklessness; they do it out of worry or a genuine mix-up, and in almost every such case the outcome is harmless. Knowing that can take a lot of the fear out of the moment.
The three twice situations
People end up taking Plan B twice for very different reasons, and the right way to think about it depends entirely on which situation you are in.
This is a needed repeat, not an overdose. If you happen to throw up within roughly two hours of taking the pill, it may not have fully absorbed into your system, so taking another one is genuinely the right move. The standard guidance is to call a pharmacist or healthcare professional to confirm, but repeating the pill in this particular case restores the intended dose rather than overdosing on it.
This is an appropriate second dose. Because each separate dose works and then clears independently of the others, as we explain in detail in how long Plan B stays in your system, a fresh encounter that needs covering can warrant a fresh dose. The earlier pill simply does not protect against any later sex, so a fresh new dose for a genuinely new situation is perfectly reasonable.
This is harmless but pointless. Taking a second pill at the same moment, whether by simple accident or in the hope of somehow being extra protected, does not add any benefit at all, since one dose is the full effective amount. You may just feel more nauseated. There is genuinely no danger in it, but there is also no advantage to be gained.
So before worrying, identify which situation applies. A vomit-related repeat and a dose for a new encounter are both sensible; a doubled dose taken for reassurance simply adds side effects without benefit. Once you place your own situation into the right one of these three boxes, the anxiety usually eases, because each box has a clear and reassuring answer. There is no scenario among them where you have done yourself harm; the only differences are whether the second dose was useful or merely unnecessary. For how repeated use over time relates to fertility, see taking Plan B too many times.
The old two-dose regimen vs today’s single dose
A surprising amount of the confusion about taking two pills comes down to history, so it is worth clearing up directly.
Two pills used to be the protocol
Older emergency contraception came as two levonorgestrel tablets of 0.75 milligrams each, taken twelve hours apart, which added up to a total of 1.5 milligrams. So for a long time, two pills was simply the correct regimen, not an overdose. If you have seen older instructions, or heard from someone who remembers it that way, that two-pill image is where it comes from. It was never about taking a double dose; it was the dose, split into two halves.
Today it is one tablet
Modern Plan B and most generics deliver the same 1.5 milligrams in a single tablet taken once. So with today’s products, one pill is the full, complete dose, and there is no second tablet to take twelve hours later. Taking two of today’s single-dose pills together would be double the studied amount, which, as covered above, is not dangerous but offers no added benefit. The thing to do is check your specific package, which will tell you it is a one-tablet product, as nearly all now are.
This shift to a single pill was made specifically to simplify things and reduce mistakes, since a one-step dose is harder to get wrong than a two-part schedule where someone might forget the second tablet or take both at once. So the modern design is on your side: with one pill to take, there is far less room for the kind of confusion that the old regimen sometimes caused.
So if you were unsure whether you were supposed to take two, the answer with a current single-dose product is no: one tablet is everything you need. This is a common and understandable mix-up, especially given how the regimen has changed over the years.
Clearing this up resolves a lot of needless worry. Someone who took two pills under the old understanding did exactly the right thing for that era, and someone who has a modern single-dose pill needs only the one. Either way, the amount of hormone involved is modest and safe.
Can you crush Plan B?
A question that comes up, often from people worried about swallowing or about keeping a pill down, is whether you can crush Plan B. The short answer is that it is not the intended way to take it.
Plan B is designed and studied to be swallowed whole as an intact tablet, and there is no established benefit whatsoever to crushing it first. Crushing is not a tested method of taking it, so how it might affect absorption or how well it works is simply not known, and it would likely taste unpleasant. For these reasons, the sensible default is to take the tablet whole with water, as directed on the package.
If you have genuine difficulty swallowing pills, the right step is to ask a pharmacist rather than improvising. They can advise you on the single best approach for your situation, or point you toward other forms of emergency contraception entirely. A pharmacist is genuinely easy to reach, and asking a quick question is far better than guessing on your own with a time-sensitive medication.
So unless a pharmacist tells you otherwise for your specific situation, take Plan B as a whole tablet. Crushing it offers no proven advantage and introduces unknowns you do not want when the goal is for the dose to work reliably.
The same caution applies to other improvised ways of taking it, such as dissolving it in a drink or splitting it. These are not how the pill was tested, so their effect on absorption is simply unknown, and with a time-sensitive, one-shot medication, the safe path is to follow the standard instructions exactly. If swallowing a tablet is a real barrier for you, that is a worthwhile thing to raise with a pharmacist ahead of time, so you have a plan that does not rely on guesswork in the moment.
Too much in one cycle
A related worry is using Plan B more than once in the same menstrual cycle, for separate encounters. This is not dangerous, but it does have downsides worth understanding.
Not harmful, but more disruptive
Taking emergency contraception several times within one cycle will not harm you or your fertility in any way, but each dose can nudge your hormones and your cycle, so using it repeatedly tends to cause more irregular spotting and bleeding and makes the cycle that much harder to track. We cover those cycle effects in can Plan B mess up your cycle. The medication itself remains entirely safe; the trade-off is unpredictability in your bleeding and cycle. None of that damages your body, but it can make the weeks afterward harder to read, which is its own kind of stress that a steady method would spare you.
A sign to consider regular birth control
If you find that you are reaching for Plan B fairly often, that is usually a clear signal that a regular, ongoing contraceptive method would serve you much better. Plan B is designed as a backup, not a primary method, and it is less effective and more disruptive than ongoing options. The difference between the two is the subject of is Plan B the same as birth control.
So repeated use in a cycle is safe but messy, and frequent need is best met with a regular method rather than repeated emergency doses. For the longer-term fertility question specifically, see taking Plan B too many times, and the calculator can help with timing in the meantime.
Managing the side effects of an extra dose
If you took extra and now feel queasy or off, the discomfort is usually manageable at home and short-lived. A few simple steps help you ride it out.
Easing nausea, fatigue, and bleeding
For nausea, eating something plain like crackers or toast, trying a little ginger, sipping water, and resting can all take the edge off. If queasiness is bothering you, a pharmacist can suggest an over-the-counter anti-nausea option suited to you. For tiredness or dizziness, the best response is simply to rest and stay hydrated rather than pushing through. And if you notice some irregular spotting, a panty liner and a bit of patience are usually all that is needed, since it tends to settle as your hormones rebalance.
How long it lasts
The encouraging part is that these effects are temporary, because they track the drug being in your system, which clears over several days, as we explain in how long Plan B stays in your system. Most people find the worst of it passes within a day or two. The full range of effects and their usual timelines are covered in our side effects guide.
When should you reach out? If vomiting is severe or persistent, or any symptom genuinely worries you, call a pharmacist or clinician for advice. Otherwise, the effects of an extra dose are a matter of comfort, not safety, and they will ease on their own as the hormone clears.
It can also help simply to expect the discomfort rather than be alarmed by it. Knowing in advance that an extra dose may make you queasy for a day means that if it happens, you can recognize it as the predictable, harmless reaction it is, rather than reading it as a sign that something has gone wrong. Anticipating the feeling tends to make it much easier to sit with.
So treat the aftermath of an extra dose the way you would a passing bout of nausea: gently, with rest and bland food, and without alarm. It is your body processing a bit more hormone than usual, and it will return to normal within a couple of days.
If you think you took too much
If you have realized you took more than the single dose, here is how to handle it calmly, along with the situations that do call for help.
For an everyday extra dose
If you simply took two pills, or a dose more than intended, you are very likely fine and do not need emergency care. Manage any nausea with rest and bland food, and know in advance that some irregular bleeding or a slightly shifted period is possible as the extra hormone gradually clears from your system. There is no antidote needed and nothing whatsoever to flush out; the effects will simply pass on their own over the next day or two.
When to call for help
The picture is different for a genuinely large overdose, such as someone swallowing many pills at once, or a child getting into the medication. In those particular cases, contact a Poison Control Center right away, which in the United States is reachable at 1-800-222-1222, or otherwise seek medical help. Likewise, any signs of a severe allergic reaction, such as sudden trouble breathing or swelling of the face, lips, or throat, should be treated as a genuine emergency.
Keep Plan B out of reach of children. If a child swallows any, or if anyone takes a large number of pills, contact Poison Control or emergency services right away rather than waiting to see what happens.
So for a routine extra dose, calm self-care is all that is needed. Reserve urgent action for a true large overdose, a child ingesting pills, or a severe allergic reaction, none of which describe the everyday situation of having taken one pill too many.
Red flags worth knowing
Most situations involving too much Plan B need no medical attention at all. A few specific symptoms, though, are worth acting on, whether or not you took an extra dose.
Severe lower-abdominal pain, especially weeks later. Significant one-sided or severe belly pain in the weeks following a dose should be checked promptly by a clinician, as it can rarely signal an ectopic pregnancy, as noted in how to know if Plan B failed.
Signs of a severe allergic reaction. Trouble breathing, or swelling of the face, lips, or throat, needs emergency care right away.
Very heavy or prolonged bleeding. Soaking through pads quickly, or bleeding that goes on much longer than expected, is worth a call to a clinician.
A period more than a week late. If your period is over a week overdue, take a pregnancy test, as covered in when to test after Plan B.
These particular flags are uncommon and are not specific to taking too much in any way; they apply equally to any use of the pill. Listing them is about completeness, not alarm. The everyday reality of an accidental extra dose is mild side effects that fade quickly on their own, not anything resembling an emergency.
So keep these few signs in the back of your mind, but do not let them overshadow the main message. An extra pill is not dangerous, and the symptoms that warrant a call are rare and would matter regardless of how many pills you took.
More isn’t better
If there is one idea to take from all of this, it is that with Plan B, more is simply not better. The single dose is calibrated to do the job.
Taking extra does not strengthen the pill in any way or improve your odds of preventing pregnancy; it only loads on the side effects you really do not need. The only two repeats that make any sense at all are a dose after vomiting within two hours, or a dose for a genuinely new and separate encounter. Doubling up out of pure anxiety, on the other hand, is completely understandable but ultimately unhelpful, and it is worth gently resisting the urge, since it simply trades a little comfort now for queasiness later with nothing at all gained.
And if you find yourself reaching for emergency contraception often enough to wonder about doubling doses, that is the real cue to look at a regular method, which is more effective and far less disruptive, as discussed in is Plan B the same as birth control. The calculator can help with timing whenever you do use a single dose.
So trust the standard dose, repeat it only for the two valid reasons, and treat the impulse to take more as a feeling to manage rather than an instruction to follow. That keeps you both protected and comfortable, which is exactly the point.
It is also worth being kind to yourself if anxiety has driven you to consider, or actually take, an extra pill. The wish to do everything possible to prevent an unwanted pregnancy is completely understandable, and reaching for a second dose comes from that same caring place. The gentle correction is just that, in this particular case, the extra effort does not translate into extra safety, so you can channel that care into getting the timing right and, if the worry is recurring, into a more reliable everyday method.
When a repeat dose is the right call: a quick guide
Pulling the threads together, here is a simple guide to when repeating a dose makes sense and when it does not, so you can decide quickly and confidently.
You vomited within about two hours: repeat it. The first dose may not have absorbed, so take another and call a pharmacist or professional to confirm. This restores the dose rather than overdosing.
You had more unprotected sex afterward: take a new dose. The earlier pill does not cover a later encounter, so a fresh dose for the new situation is appropriate.
You’re not sure you swallowed it, or spat it out: ask a pharmacist. Rather than guessing, a quick question clears up whether you need another. A pharmacist is easy to reach and happy to help.
You just want to feel safer, with no vomiting or new sex: don’t. One dose is the full effective amount, so an extra pill only adds side effects with no benefit.
Alongside this, remember that timing is what most affects whether a single dose works, so taking it as soon as possible matters more than taking more of it. Our guide on how long Plan B is effective explains that window in detail.
So the rule of thumb is to repeat only for a vomit within two hours or a genuinely new encounter, to ask a pharmacist when unsure, and to skip the extra pill otherwise. The calculator can help you get the timing of a single dose right.
Related guides
If your real question is about repeated use, side effects, or your cycle, these companion guides go deeper.
See taking Plan B too many times, side effects, cycle changes, and how long it stays in your system, or use the emergency contraception calculator.
Frequently asked questions
What happens if you take too much Plan B?
Mainly more side effects, not danger. There is no known harmful overdose of levonorgestrel at these doses, and the main expected effect of taking too much is nausea and possibly vomiting. It does not increase your protection against pregnancy. Serious overdose is extremely rare, so an extra pill or two is not dangerous, just potentially more uncomfortable.
Is it dangerous to take two Plan B pills?
No. Taking two pills is not dangerous; the most likely result is feeling more nauseated. It also does not make the pill more effective, since one dose is the studied effective amount. If you took two by accident or to feel safer, you can relax: there is no harm, only the chance of stronger side effects.
Does taking more Plan B make it more effective?
No. The standard single dose is already the amount studied to work. Taking extra does not delay ovulation any harder or improve your odds of preventing pregnancy; it only raises the chance of side effects like nausea. More hormone does not equal more protection, so there is no reason to take more than one dose for a single situation.
I vomited after taking Plan B, do I need to take another?
Possibly. If you vomited within about two hours of taking the pill, it may not have absorbed, so you may need to repeat the dose. Call a pharmacist or healthcare professional to confirm. This is a needed repeat to restore the dose, not an overdose, so do not worry that taking another in this case is harmful.
Can I take Plan B twice or take a second dose after more sex?
Yes, for a new encounter. Because each separate dose works and clears independently, if you have more unprotected sex after taking a dose, then a second dose to cover that new encounter is entirely appropriate, since the earlier pill does not protect against later sex. This is different from doubling up at once, which adds side effects without benefit.
Can you crush Plan B?
It is not the intended way to take it. Plan B is designed to be swallowed whole, and there is no established benefit to crushing it, plus how crushing affects absorption is not known. Take the tablet whole with water as directed. If you have trouble swallowing pills, ask a pharmacist about the best approach rather than improvising.
What should I do if I think I overdosed on Plan B?
For a routine extra dose, like taking two pills, you are very likely fine; just manage any nausea and expect possible irregular bleeding. For a genuinely large overdose, or if a child swallows pills, contact a Poison Control Center right away, in the US at 1-800-222-1222, or seek medical help. Signs of a severe allergic reaction are also an emergency.
Can taking Plan B too many times in one cycle hurt me?
It will not harm you or your fertility, but using it repeatedly in one cycle tends to cause more irregular bleeding and makes your cycle harder to track. Plan B is only meant to be a backup, so a frequent need for it is a clear sign that a regular contraceptive method would be both more effective and far less disruptive than repeated emergency doses.
The bottom line
Taking too much Plan B is not dangerous. There is no known harmful overdose at these doses, and the main effect of extra hormone is more nausea, not more protection, since the single dose is already the effective amount. The only repeats that make sense are a dose after vomiting within about two hours, or a dose for a genuinely new encounter. Doubling up out of anxiety just adds side effects. Take the tablet whole rather than crushing it, keep it away from children, and contact Poison Control for a true large overdose or a child ingesting pills. If you are reaching for it often, a regular birth control method is the better answer.
Use the free emergency contraception calculator, read about side effects, learn about repeated use, or browse our health guides.
Sources & references
This article is based on the manufacturer’s labeling and reputable health publishers. Always confirm details with a current source, a pharmacist, or a clinician.
The Plan B label states there are no data on overdose, with nausea and vomiting the anticipated effects, and advises contacting Poison Control in case of overdose. accessdata.fda.gov
The consumer label notes the pill works mainly by preventing ovulation, advises repeating the dose if you vomit within two hours, and to keep it out of reach of children. dailymed.nlm.nih.gov
If you vomit within two hours, call a professional about repeating the dose; severe stomach pain after a dose should be checked, as it can rarely signal an ectopic pregnancy. webmd.com
Levonorgestrel is for occasional emergency use, not a regular method, and you should call a doctor if you vomit within two hours of taking it. mayoclinic.org
Important disclaimer
This guide is for general education only and is not medical advice, nor a substitute for care from a qualified clinician, pharmacist, or poison-control service. It does not diagnose, treat, or create a doctor–patient relationship. In any case of a suspected large overdose, a child ingesting medication, a severe allergic reaction, or symptoms that concern you, contact Poison Control or emergency services right away. Always follow the directions on your specific package. Medication labeling can change and differ by country. Waldev is an independent education and tools website and is not affiliated with, endorsed by, or sponsored by Plan B One-Step, ella, the FDA, or any product or organization named on this page. Brand names are used only for identification.