Frequently asked questions
When did you have sex
without a contraceptive or have a contraceptive accident?
Sometimes you need a plan B.
If your question about Plan B® is not answered in the list below, speak to your healthcare professional for more information.
You can get pregnant at any time during your monthly cycle—from the start of one period to the beginning of the next. Although people talk about a “safe time of the month,” it’s hard to tell when this is, for many reasons. Your most fertile time of the month is when you’re ovulating (producing an egg), but most women aren’t aware when this is happening. Also, it takes several days for an egg to make its way from the ovary down the fallopian tube, and an egg can be fertilized at any point during this journey. Sperm can survive in a woman’s body for up to seven days, so even if you hadn’t ovulated when you had sex, the sperm could still fertilize the egg sometime afterwards.
Many women don’t have regular periods. The time between your periods can vary, depending on what’s happening in your life, whether you’re stressed, and whether or not you’re eating properly. This makes it even more difficult to calculate your “safe” time.
When accidents happen, such as a condom breaking, and you don’t want to get pregnant, emergency contraception is there as a plan B. It’s not something you should use regularly, and you should never think of it as an alternative to a regular method of birth control.
Absolutely not. Plan B® does not work if you are already pregnant (a fertilized egg has attached to the wall of the uterus). So if you were to take Plan B®, you will not be terminating a pregnancy.
If you already have a confirmed pregnancy, you should not use Plan B® because it will not be effective.
If you forgot to take one or more of your oral contraceptive pills for more than a 24-hour period and you engaged in unprotected intercourse during the day of the missed pill or within five days after the missed pill, consider taking Plan B® to prevent an unwanted pregnancy.
Plan B® has no long-term effect on your menstrual cycle. Most women will get their next period when expected, and their cycle will continue as normal. For some women, their period can come earlier or later than usual and be lighter or heavier. If your period is delayed more than a week, or if you have any other cause for concern, contact your healthcare professional. More than occasional use (more than once within a menstrual cycle or more than once a month) may impact your menstrual cycle. You may also experience a few days of spotting after taking Plan B®, which is normal.
In a province or territory where Plan B® is kept over the counter, you will find it in one of the following sections: Birth Control, Contraceptives, Feminine Hygiene, or Family Planning.
In Québec where Plan B® is kept behind the pharmacy counter, the pharmacist may ask you a few simple questions before giving you, or prescribing you (in Québec), Plan B® to ensure it’s right for you. These professionals have been trained to handle requests for emergency contraception sympathetically and confidentially. In some cases, your pharmacist may refer you to a doctor or clinic for emergency contraception instead.
Plan B® emergency contraception should not be used as a regular method of birth control. However, if you have already used Plan B, it can be safely used again after another instance of unprotected sex or birth control failure. It will not affect a woman’s future fertility.
Plan B doesn’t provide long-term protection against future pregnancy—it works to help prevent pregnancy after only one act of unprotected sex or birth control failure.
Plan B® is available at pharmacies across Canada without a prescription from your doctor. Plan B® is available over the counter in Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Nova Scotia, Nunavut, the Northwest Territories, Ontario, Prince Edward Island, Saskatchewan, and Yukon. It can be found in any of these sections of your pharmacy: Birth Control, Contraceptives, Feminine Hygiene, or Family Planning. It is available under prescription by your pharmacist in Québec.
Plan B® helps prevent pregnancy by temporarily delaying ovulation. That is, it works by stopping the release of an egg from the ovary, so there’s no egg to meet the sperm. No egg, no fertilization, no pregnancy.
The sooner you take Plan B®, the more effective it is. It can prevent pregnancy if taken within 72 hours and preferably within 12 hours of unprotected sex. If you take it within 24 hours of unprotected sex, it is 95% effective.
Severe reactions to Plan B® are uncommon. Temporary side effects, however, may occur and usually pass within 24 hours. The most common side effects include nausea, abdominal pain, fatigue, headache, dizziness, breast tenderness, vomiting, diarrhea, and irregular menstrual bleeding. Less common reactions are migraine or severe headache, lower abdominal pain, painful menstruation, and vaginal discharge. If your period is more than a week late or if these symptoms continue for more than 48 hours or are severe, see a healthcare professional.
Be sure to contact a healthcare professional immediately if you experience any of the following serious side effects: itching and rash, cramping or severe pain in your stomach or belly before your next normal period, uterine hemorrhage, vaginal hemorrhage. If you vomit within two hours of taking Plan B®, you may need to take another dose.
If you have had unprotected sex or a contraceptive accident, emergency contraception should be taken as soon as possible to prevent pregnancy. Although there is some data that levonorgestrel (the main ingredient in Plan B®) may be less effective in women with increasing weight or higher BMI (body mass index), the data is limited and inconclusive. If you have any questions about this, please speak to your healthcare provider.
If you have any questions, you can call the Plan B® medical information line toll-free at 1‑888‑919‑0782 (Canadian residents only).