What to expect from Plan B®
When did you have sex
without a contraceptive or have a contraceptive accident?
Plan B® is effective
Although few women experience vomiting with Plan B®, if you vomit within two hours of taking Plan B®, you might not have absorbed the medication contained in the pill. Call your healthcare professional, as you might need another dose.
After you’ve taken Plan B®, you should get your next period at the expected time, or a few days early or late. You may experience spotting a few days after taking Plan B®, but this is not your period.
If you’ve taken Plan B® because of missed birth control pills, start your birth control pills right away.
For any questions, you can call the Plan B® medical information line at 1‑888‑919‑0782 (Canadian residents only).
When it should not be used:
Do not use Plan B if:
- You have a confirmed or suspected pregnancy
- You are allergic to levonorgestrel or to any ingredients in the formulation (see non-medicinal ingredients below)
- You have abnormal vaginal bleeding
Side effects of the morning-after pill
It’s very unlikely that you will have any severe reactions to Plan B®. You may have some temporary side effects that will usually pass within 24 hours.
Most common Plan B® side effects
Like all medications, Plan B® can cause some side effects:
- Abdominal pain
- Breast tenderness
- Irregular menstrual bleeding: Some women may experience spotting after taking Plan B®. The majority of women will have their next menstrual period at the expected time or early. When Plan B® is used repeatedly (more than once in a menstrual cycle, or more than occasional once-a-month use), menstrual changes may occur, including a shorter or longer cycle and a heavier or lighter period than normal.
Serious Warnings and Precautions
Plan B® provides no protection against HIV/AIDS and other sexually transmitted diseases (STDs), such as syphilis, gonorrhea, chlamydia, and herpes. If you are worried about whether you may have been infected with HIV/AIDS, or other sexually transmitted diseases, talk to your health professional about your concerns and ask how you can protect yourself in the future.
If your period is delayed more than 1 week, you should contact your doctor and have a pregnancy test done.
Call your doctor immediately if the following symptoms and signs of serious adverse effects occur:
- Itching and rash
- Cramping or severe pain in your stomach or belly prior to your next normal period, since this can be a warning sign of tubal (ectopic) pregnancy – a serious medical problem.
- Uterine hemorrhage
- Vaginal hemorrhage
For more details, download the abbreviated Plan B® Product Monograph (Part III):Product Monograph (Part III): Plan B® 1.5 mg