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 i had unprotected sex after i took the plan b pill will the plan b pill work 4 days after i took it or should i take another and start birth control?
Hi Curious,

Plan B is not intended to be used prior to having sex as birth control so no, it won't work 4 days later.  Use another form of protection, such as a condom.
 
Plan B is also not meant to be taken multiple times during your cycle.  It is a very large dose of hormones.

You should consider starting daily birth control.  Most take at least 7 days to become effective however.

Hope it helps.
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I know its not meant to be taken before sex, and it was stupid of me. But I thought we were covered and I'm hoping for the chance that the hormones that stop ovulation/fertilization would have still been at work. Would you know if it helps at all if you have unprotected sex about 10 hours after taking it?
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10 hours after, it'll will probably help, as it will be in your bloodstream, although that is not the intended use.

No guarantees.
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