Plan B One-Step is a backup or emergency method of birth control you can use when:
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When not to use Plan B One-Step .
Plan B One-Step should not be used:
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When s hould I talk to a doctor or pharmacist?
Ask a doctor or pharmacist before use if you are taking efavirenz (HIV medication) or rifampin
(tuberculosis treatment) or medication for seizures (epilepsy). These medications may reduce the
effectiveness of Plan B One-Step and increase your chance of becoming pregnant. Your doctor may
prescribe another form of emergency contraception that may not be affected by these medications.
How does Plan B One-Step work?
Plan B One-Step is one tablet with levonorgestrel, a hormone that has been used in many birth control
pills for several decades. Plan B One-Step contains a higher dose of levonorgestrel than birth control
pills, but works in a similar way to prevent pregnancy. It works mainly by stopping the release of an egg
from the ovary. It is possible that Plan B One-Step may also work by preventing fertilization of an egg
(the uniting of sperm with the egg) or by preventing attachment (implantation) to the uterus (womb).
How can I get the bes t res ults from Plan B One-Step ?
You have 72 hours (3 days) to try to prevent pregnancy after birth control failure or unprotected sex.
The s ooner you take Plan B One-Step , the better it works .
How effective is Plan B One-Step ?
If Plan B One-Step is taken as directed, it can significantly decrease the chance that you will get
pregnant. About 7 out of every 8 women who would have gotten pregnant will not become pregnant.
How will I know Plan B One-Step worked?
You will know Plan B One-Step has been effective when you get your next period, which should
come at the expected time, or within a week of the expected time. If your period is delayed beyond 1
week, it is possible you may be pregnant. You should get a pregnancy test and follow up with your
healthcare professional.
Will I experience any s ide effects?
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your regular birth control was used incorrectly or failed
you did not use any birth control method
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as a regular birth control method, because it’s not as effective as regular birth control.
if you are already pregnant, because it will not work.
if you are allergic to levonorgestrel or any other ingredients in Plan B One-Step .
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some women may have changes in their period, such as a period that is heavier or lighter or a
period that is early or late. If your period is more than a week late, you may be pregnant.
if you have severe abdominal pain, you may have an ectopic pregnancy, and should get immediate
medical attention.