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A member asked:
How effective is an emergancy contraceptive pill like plan b? how fast do i need to take it for the maximum effect?
A doctor has provided 1 answer
Take it as soon as: possible after the episode with failed birth control. Plan B One-Step is up to 89 % effective when taken within 72 hours (3 days) after unprotected sex. It can reduce chance of pregnancy by up to 95% if used within 24 hours. It continues to reduce the risk of pregnancy up to 120 hours (5 days) after unprotected sex, but is less effective as time passes.
Answered 9/8/2017
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