Plan B One-Step

Generic Name: Levonorgestrel

  • What is this medication?

    Plan B One-Step contains a higher dose of a hormone found in many birth control pills. It is intended to prevent pregnancy after you have had unprotected sex or contraceptive failure one or more times in the last 72 hours (3 days).
  • Are there any warnings associated with Plan B One-Step?

    If you experience severe abdominal pain, you may have an ectopic pregnancy and should get immediate medical attention.

    The only way of knowing whether Plan B One-Step has worked is when you get your next period, which should come at the expected time or within a week of the expected time. If your period if more than 7 days late, you may be pregnant.

    Plan B One-Step is less likely to work if you have unprotected sex, or contraceptive failure again in the same menstrual cycle after taking Plan B One-Step; if you've already had unprotected sex or contraceptive failure earlier in your menstrual cycle; or if you vomit within two hours of taking Plan B One-Step (talk to your healthcare provider if this happens).

    Do not use Plan B One-Step if you are already pregnant (because it won't work).

    Do not use Plan B One-Step if you're allergic to levonorgestrel or any of the ingredients in this product.

    Do not use Plan B One-Step in place of regular birth control. Plan B One-Step should not be used as routine birth control, as it isn't effective.

    Plan B One-Step will not protect you from HIV infection (the virus that causes AIDS) or any other sexually transmitted diseases (STDs).

    If you have unprotected sex after taking Plan B One-Step, it cannot protect you from getting pregnant.

    Plan B One-Step doesn't provide long-term protection against future pregnancy. It only works to prevent this one incident. If you are sexually active, even occasionally, see your healthcare professional or clinic to find a method of birth control and STD prevention that suits you.

    You should resume your regular method of contraception (or start one if you don't have a regular method) right away since Plan B One-Step does not reliably protect against pregnancy beyond the day it is used. You do not need to use additional back-up contraception to your birth control pills after using Plan B One-Step.

    Plan B One-Step should only be used in emergencies, but there is no medical reason why you can't use it more than once. Don't be afraid to use Plan B One-Step when you need to, but remember that it should never replace routine methods of contraception, as it simply isn't as effective.

  • Should I talk to my doctor before taking Plan B One-Step?

    Ask a healthcare professional if you have any questions or need more information about this product.

    Talk to your doctor if you have any health concerns that could lead to unwanted side effects related to this product.

  • What are the possible side effects of Plan B One-Step?

    Some women may experience side effects similar to those of many birth control pills, including changes in your period (a heavier or lighter next period, or a period that is early or late), nausea, lower abdominal pain, fatigue, headache, dizziness, and breast tenderness.

    If your period is more than a week late, you may be pregnant. If you experience severe abdominal pain, you may have an ectopic pregnancy and should get immediate medical attention.

    Side effects cannot always be anticipated. If any develop or change in intensity, tell your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue using this product.

  • What should I avoid while taking Plan B One-Step?

    Do not use Plan B One-Step in place of regular birth control.
  • What are possible food and drug interactions associated with Plan B One-Step?

    If Plan B One-Step is taken with certain other drugs, the effects of either could be increased, decreased, or altered. Always check with your doctor before combining Plan B One-Step with any other medication.
  • What is the usual dosage of Plan B One-Step?

    Adults and children 17 years: Take the one pill within 72 hours (3 days) after unprotected sex or contraceptive failure.
  • Children <17 years:

    See your healthcare professional.
  • How should I store Plan B One-Step?

    Store at room temperature.