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A member asked:
How long after taking plan b until the side effects start?
A doctor has provided 1 answer
Within 24 hours: Some side effects may start as early as 1 hour like vomiting and headache, and allergic reaction to the medicine and others may come within 24 hours and mestrual changes if any at next period but not every one who takes Plan B gets the all or some of the side effects.
Answered 6/30/2014
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Took 2 Plan B in one day. Thought it wouldn't work after taking it the first time and had sex again. Are side effects a week and a half later normal?
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