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A member asked:
If i just took the plan b its only been 15 hours of unprotected sex and if i smoke weed after i take plan b can it affect the plan from not working ?
A doctor has provided 1 answer
Not a problem: The ECP should work up to its usual effectiveness regardless of weed use. It is not 100% in any situation but timing is the main limit for effectiveness and you are well within the suggested interval.
Answered 12/31/2020
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