About this medication
- Levonorgestrel (Plan B) is an emergency contraceptive pill used to help prevent pregnancy after unprotected sex or a birth control mistake, such as a broken condom or a missed pill.
Reduces pregnancy risk after contraceptive failure or unprotected intercourse.
How to use it
- Swallow the tablet whole with a glass of water.
- You can take this medicine with or without food.
- Take this medicine exactly as directed on the package or by the Care365 care team. It is a single dose taken as soon as possible, and within a few days, after unprotected sex.
- If you vomit within 2 hours of taking the tablet, contact your healthcare professional, since you may need another dose.
If you miss a dose
- This medicine is a one-time dose, so there is no ongoing schedule to miss. If you have unprotected sex again after taking it, you will need a new dose, since it does not protect against future acts of intercourse.
Take promptly; the referenced label specifies within 72 hours. After that, urgently discuss other options. Vomiting soon after dosing needs advice.
Pregnancy and breastfeeding
- Do not take this medicine if you are already pregnant — it will not work and is not meant to end a pregnancy.
- If you are breastfeeding, this medicine is generally considered compatible with breastfeeding, but check with your healthcare professional.
Not useful in established pregnancy; breastfeeding counselling is available.
Before you use it
- Tell your healthcare professional if you think you might already be pregnant, since this medicine will not work if you are already pregnant.
- Tell your healthcare professional about any liver problems you have or have had.
- Tell your healthcare professional about all medicines, herbal products, and supplements you take, since some can make this medicine less effective.
- This medicine works best the sooner it is taken after unprotected sex.
Important warnings
- This medicine does not protect against HIV or other sexually transmitted infections. Use condoms if you want protection against infections.
- This medicine is meant for occasional emergency use, not as your regular method of birth control.
- If your period is more than a week late after taking this medicine, take a pregnancy test and talk to your healthcare professional.
- Get medical care right away if you have severe lower belly pain after taking this medicine, especially if your period is late, since this could be a sign of a pregnancy that has implanted outside the womb.
Does not end an existing pregnancy or protect subsequent intercourse.
Possible side effects
- Nausea or vomiting
- Lower belly pain or cramping
- Tiredness
- Headache
- Dizziness
- Breast tenderness
- Diarrhea or constipation
- Acne
- Spotting or light bleeding between periods
- A period that comes earlier, later, heavier, lighter, or more painful than usual
Nausea, cramps, fatigue and menstrual changes.
When to get help
When to get emergency help
- Severe lower belly pain, especially if it is one-sided or your period is late.
- Signs of a severe allergic reaction, such as swelling of the face or throat, hives, or trouble breathing.
When to contact a healthcare professional
- If your period is more than a week late.
- If you have unusual or heavy vaginal bleeding.
- If you get new or unusually severe headaches or migraines.
- If you think you might be pregnant.
- If you need emergency contraception more than once in the same cycle, so you can talk about a regular birth control method.
Severe lower abdominal pain or a period over a week late requires assessment.
Other medicines and products
- Tell the Care365 care team about all medicines you take, including seizure medicines, certain HIV medicines, and the herbal product St. John's wort, since these can make this medicine less effective.
- You can take this medicine with or without food.
- There are no specific alcohol restrictions with this medicine.
Enzyme-inducing medicines may reduce effectiveness.
Missed doses, storage and accidental exposure
- Store at room temperature and away from high humidity, such as a bathroom cabinet.
- Keep out of reach of children.
Follow your own product’s missed-dose instructions. If you are unsure, ask the Care365 clinical team before taking an extra dose. Contraceptives, injections and modified-release medicines may need a specific plan.
Keep the original packaging and follow its storage, expiry and disposal instructions. Keep medicines away from children and pets. Ask about refrigeration, after-opening limits and safe sharps disposal when relevant.
For suspected overdose or accidental swallowing, contact poison control or urgent medical care promptly. Call emergency services for breathing difficulty, collapse or a seizure.
Key points to remember
- This medicine works best the sooner you take it after unprotected sex, and becomes less effective the longer you wait.
- This medicine does not protect against future acts of unprotected sex — use another method of birth control until your next period.
- Talk to the Care365 care team about regular, more effective birth control options if you find yourself needing emergency contraception often.
These practical points come from the Pharmasist patient handout for the same product monograph cited by this guide.